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WO2014117728A1 - 单片式电容触摸屏及其制作方法 - Google Patents

单片式电容触摸屏及其制作方法 Download PDF

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Publication number
WO2014117728A1
WO2014117728A1 PCT/CN2014/071654 CN2014071654W WO2014117728A1 WO 2014117728 A1 WO2014117728 A1 WO 2014117728A1 CN 2014071654 W CN2014071654 W CN 2014071654W WO 2014117728 A1 WO2014117728 A1 WO 2014117728A1
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WO
WIPO (PCT)
Prior art keywords
touch unit
electrode
color layer
substrate
touch screen
Prior art date
Application number
PCT/CN2014/071654
Other languages
English (en)
French (fr)
Inventor
陈祖辉
蔡怀清
林玉辉
Original Assignee
福建科创光电有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN2013100429031A external-priority patent/CN103257768A/zh
Priority claimed from CN2013100428880A external-priority patent/CN103257767A/zh
Priority claimed from CN201310036353.2A external-priority patent/CN103246413B/zh
Application filed by 福建科创光电有限公司 filed Critical 福建科创光电有限公司
Priority to US14/764,465 priority Critical patent/US9760227B2/en
Priority to CN201480006366.8A priority patent/CN104956298A/zh
Publication of WO2014117728A1 publication Critical patent/WO2014117728A1/zh

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • G06F3/04164Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04107Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the present invention relates to a capacitive touch screen, and more particularly to a monolithic capacitive touch screen and a method of fabricating the same.
  • touch screen As a new type of human-computer interaction interface, touch screen is widely used in various digital information systems, from small products such as mobile phones and digital products to medium-sized products such as car navigation systems, tablet computers, game consoles, household appliances, and then Touch screen products can be seen on large products such as public inquiry systems, portable computers, and medical instruments, and the market prospects are considerable.
  • the touch screen is mainly divided into two categories: resistive touch screen (also known as resistive screen) and capacitive touch screen (also known as capacitive screen).
  • resistive touch screen also known as resistive screen
  • capacitive touch screen also known as capacitive screen
  • the capacitive touch screen has become a mainstream product in the touch screen market due to its high precision, long service life and multi-touch capability, especially in the mobile phone touch screen and tablet touch screen market.
  • capacitive touch screens can be divided into two categories: surface capacitive and projected capacitive, the latter occupying a dominant position. In this paper, if not pointed out, the capacitive touch screens mentioned are all projected capacitive touch screens.
  • Capacitive touch screens are constructed by plating one or two transparent thin film conductor layers on a glass screen, such as ITO.
  • An indium tin oxide layer is formed on the conductor layer to form an array of touch units, and a plurality of electrodes connected to the touch pattern are formed on one or more sides of the touch screen to connect the control circuit of the capacitive touch screen to the touch unit.
  • the array applies and extracts electrical signals.
  • a coupling capacitor is formed between the finger and the touch unit due to the electric field of the human body, and the position of the touched point can be accurately obtained by calculating the ratio and strength of the current leaving each electrode.
  • the field of capacitive touch screens has developed a single chip (One Glass Solution, OGS) Capacitive touch screen, which uses only one glass substrate to form ITO on the surface of the glass substrate The array of touch units simultaneously functions as a protective glass.
  • OGS One Glass Solution
  • the capacitive touch screen saves a piece of glass substrate, has a simple structure, is light, thin and has good light transmission, thereby reducing production cost and improving product qualification rate.
  • Figures 1 and 2 schematically illustrate the construction of an OGS capacitive touch screen on a substrate 1
  • the middle area of the surface is an operable area (AA) of the touch screen, and an array of a plurality of touch units such as the touch unit 2 formed by the ITO film is distributed in the operable area, and the touch unit 2 is displayed here.
  • the driving part and the sensing part are formed;
  • the border area (BM) of the periphery of the visible area (VA) has an insulating color layer 3;
  • the color layer 3 The electrode has a plurality of electrodes, including an electrode connected to the driving portion of the touch unit and an electrode connected to the sensing portion of the touch unit, such as the electrode 40 and the electrode 41.
  • the former provides an electrical signal (drive signal) to the driving portion of the touch unit, and the latter leads the electrical signal (sensing signal) of the sensing portion of each touch unit; or vice versa, the former will display the sensing portion of the touch unit.
  • the electrical signal (sensing signal) is extracted, and the latter provides an electric signal (drive signal) to the driving part of each touch unit; each electrode is used for connecting the control circuit of the capacitive touch screen and the touch unit wiring for connecting the electrode and the control circuit
  • the connection method is soldering, wire bonding, hot pressing, etc., wherein hot pressing refers to bonding the electrodes of the capacitive touch screen to the electrodes of the control circuit by heating and pressing (in this paper, the electrode portion for connecting with the control circuit)
  • An external part called an electrode each touch unit is routed on the substrate 1 extends from the driving portion and the sensing portion of each touch unit, and the ends thereof are electrically connected to the respective electrodes.
  • the touch unit trace 20 extends from the driving portion of the touch unit 2, and its end and electrode 40 The electrical connection is made; the touch unit trace 21 extends from the sensing portion of the touch unit 2, and its end is electrically connected to the electrode 41.
  • the touch unit traces shown in the figure are integrally formed with the touch units, for example, by ITO.
  • the transparent conductive film of the film is formed by one photolithography.
  • each of the traces of the touch unit trace 21 extends from the touch unit to, for example, the electrode 41.
  • the electrode 41 In the path at each electrode, it is necessary to cross the step from the substrate 1 to the color layer 3, and the height of the step is the thickness of the color layer 3.
  • the color layer obtained by the existing process of making the color layer 3 The thickness of the color layer is usually 1.0 ⁇ 50.0um, and the existing touch trace is usually obtained by etching the ITO film of the touch unit, because the thickness of the general ITO film is 15 ⁇ 30nm, when depositing 15 ⁇ 10nm thick ITO film on the substrate 1, the ITO film needs to cross 1.0 ⁇ 50.0um The high step is prone to breakage at this step, causing the problem of breakage of the touch trace prepared by etching.
  • the color layer 3 is deposited on the substrate 1 prior to the ITO film, it is required to complete the color layer 3
  • the process temperature after the process should not be too high to avoid the high temperature causing the performance and color change of the color layer 3, such as a decrease in insulation and yellowing.
  • the solution to these problems in the prior art is through the ITO
  • a thin film such as OC glue or other transparent material is deposited on the film to fill the step, and an ITO film is prepared by a low temperature coating deposition process after the color layer 3 process (and such as OC).
  • a transparent film of glue or other transparent material adds a process, requires a high temperature resistant color layer material, and even requires a low temperature coating process.
  • the substrate is transported to the coating process line or even the coating process line of the external factory to complete the coating of the substrate.
  • the difficulty and complexity of the OGS capacitive touch screen manufacturing process is provided to complete the OGS capacitive touch screen manufacturing process.
  • the technical problem to be solved by the present invention is to provide a monolithic capacitive touch screen and a method for fabricating the same, by setting a process of making a color layer in a touch unit and a touch unit. After the process, the color layer and the coating process of the high temperature resistant material are avoided, and the touch unit wiring is not required to cross the step from the substrate to the color layer.
  • the present invention provides a capacitive touch screen
  • the substrate includes a substrate, a touch unit, an insulating layer, an electrode, and a touch unit.
  • the touch unit and the insulating layer are distributed on the first surface of the substrate, and the touch unit is distributed on the capacitive touch screen.
  • the illuminating layer is disposed in a frame area of the capacitive touch screen, wherein the touch unit trace extends from the touch unit on the first surface;
  • the insulating layer partially covers the touch unit trace, and the electrode and the touch unit trace are electrically connected to a portion of the touch unit trace that is not covered by the insulating layer.
  • the insulating layer is a color layer formed of one or more of a color ink, a varnish or a color photoresist.
  • the color layer has one or more through holes, one end of the one or more through holes is in contact with the touch unit trace, and the one or more through holes are along The normal direction of the first surface extends.
  • the electrode extends over the color layer and into the one or more through holes, and the electrodes are in the one or more A portion of the through hole is in contact with the touch unit wiring.
  • a method for fabricating a capacitive touch screen for manufacturing the capacitive touch screen includes:
  • the first step is to fabricate the touch unit and the touch unit trace on the substrate
  • the electrodes are fabricated, the electrodes being partially distributed within the one or more through holes.
  • the electrode extends on the color layer; the one or more The via has a conductor therein that at least partially covers the conductor and is electrically connected to the touch unit trace through the conductor.
  • a method for fabricating a capacitive touch screen for manufacturing the capacitive touch screen includes:
  • the first step is to fabricate the touch unit and the touch unit trace on the substrate
  • the electrodes are fabricated on the color layer and the conductors are arranged.
  • the conductor is further distributed outside the one or more through holes, and the conductor is in the one or more A portion other than the through hole is in contact with the electrode.
  • a method for fabricating a capacitive touch screen for manufacturing the capacitive touch screen includes:
  • the first step is to fabricate the touch unit and the touch unit trace on the substrate
  • the electrodes are fabricated on the color layer and the conductors are arranged.
  • the material of the conductor is selected from any one of carbon paste, silver paste and anisotropic conductive paste or A mixture of any two or three of carbon paste, silver paste and anisotropic conductive paste.
  • the material of the electrode is selected from any one of silver paste, carbon paste or a mixture of silver paste and carbon paste.
  • the electrode is an anisotropic conductive layer; the anisotropic conductive layer Conductive in a direction perpendicular to the first surface, non-conductive in a direction parallel to the first surface of the substrate;
  • the color layer has an opening, the electrode is at least partially in the opening, and a portion of the electrode in the opening is in contact with the touch unit; the electrode and the substrate The first surface is in contact.
  • the opening is a single hole opening or a porous opening.
  • the color of the electrode is the same as the color of the color layer.
  • anisotropic conductive layer is an ACP adhesive layer.
  • a method for fabricating a capacitive touch screen for manufacturing the capacitive touch screen includes:
  • the first step is to fabricate the touch unit and the touch unit trace on the substrate
  • the color layer is formed on the substrate, and the color layer has the opening;
  • the electrode is fabricated.
  • the second color layer is further included therein.
  • the electrode partially covers the color layer, the second color layer partially covers the touch unit trace and the electrode, and the second color layer at least partially covers the color layer;
  • the two color layers are insulated.
  • a method for fabricating a capacitive touch screen for manufacturing the capacitive touch screen includes:
  • the first step is to fabricate the touch unit and the touch unit trace on the substrate
  • the third step is to fabricate the electrode
  • the second color layer is fabricated.
  • the second color layer is selected from any one of a color ink coating, a varnish coating, and a color photoresist coating.
  • the color layer and the second color layer have the same color.
  • the material of the electrode is selected from any one of silver paste, carbon paste or a mixture of silver paste and carbon paste, and the electrodes are the same color as the color layer and the second color layer.
  • the color layer has one or more through holes, and one end surface of the electrical conductor is connected to the touch unit trace.
  • the other end face of the electrical conductor is in contact with the one or more through holes; the electrode extends over the color layer and is in contact with the electrical conductor through the one or more through holes.
  • the touch unit trace does not contact an edge of the one or more through holes; the electrodes are partially distributed in the one or more In the through hole, a portion of the electrode in the one or more through holes is in contact with the electric conductor, and the electrode is electrically connected to the touch unit wiring through the electric conductor.
  • a method for fabricating a capacitive touch screen for manufacturing the capacitive touch screen includes:
  • the first step is to fabricate the touch unit and the touch unit trace on the substrate
  • the second step is to fabricate the electrical conductor on the touch unit trace
  • the electrodes are fabricated, the electrodes being partially distributed in the one or more vias, the electrodes being in contact with the electrical conductor.
  • the material of the electrical conductor is selected from any one of carbon paste, silver paste and anisotropic conductive paste or a mixture of any two or three of carbon paste, silver paste and anisotropic conductive paste;
  • the material of the electrode is silver paste;
  • the color of the electrical conductor is the same as the color of the color layer.
  • the substrate is selected from any one of a tempered glass substrate, a tempered glass substrate, a common glass substrate, and a transparent substrate of a polymer material.
  • the touch unit and the touch unit trace are prepared from a conductive film.
  • the conductive film is a transparent conductive film
  • the transparent conductive film is selected from the group consisting of ITO Any one of a film, a graphene layer, and a carbon nanotube layer.
  • the conductive film is selected from any one of a metal mesh and a nano silver wire.
  • a second insulating layer is further included, and the second insulating layer covers the electrode.
  • a portion of the electrode for electrically connecting to a control circuit of the capacitive touch screen is an external portion of the electrode, and an external portion of the electrode is not covered by the second insulating layer.
  • a single-chip capacitive touch screen and a manufacturing method thereof are provided.
  • the capacitive touch screen includes a substrate, a plurality of touch units, a color layer, a plurality of electrodes, and a plurality of touch unit traces.
  • the color layer is distributed in the frame area of the capacitive touch screen; the plurality of touch units form an array of the touch unit; the touch unit traces extend from the respective touch units on the first surface of the substrate; the color layer partially covers each
  • the touch unit is provided with one or more through holes on a color layer of the portion of the touch unit that overlaps the electrode in the normal direction of the first surface; the two ends of the through hole are respectively touched
  • the unit traces are connected to the electrodes; conductors are arranged in the through holes, and the electrodes are electrically connected to the respective touch unit wires through the conductors in the respective through holes.
  • the method mainly comprises the steps of: forming a touch unit and a touch unit trace on a substrate by using a photolithography, etching process or a screen printing process; and forming a through hole on the substrate by using a screen printing process; a color layer; and a screen printing process to fill the vias and fabricate the electrodes.
  • a single-chip capacitive touch screen and a manufacturing method thereof are provided.
  • the capacitive touch screen includes a substrate, a plurality of touch units, a color layer, a plurality of electrodes, and a plurality of touch unit traces.
  • the color layer is distributed in the frame area of the capacitive touch screen; the plurality of touch units form an array of the touch units; the touch unit traces extend from the respective touch units on the first surface of the substrate; and the color layer has openings
  • Each electrode is electrically connected to each touch unit trace in each opening of the color layer; the material of the electrode It is an ACP adhesive layer that conducts in a direction perpendicular to the first surface of the substrate and is non-conductive in a direction parallel to the first surface of the substrate.
  • the method mainly comprises the steps of: forming a touch unit and a touch unit trace on a substrate by using a photolithography, etching process or a screen printing process; and forming a color layer on the substrate by using a screen printing process;
  • the electrodes are fabricated using a screen printing process.
  • a single-chip capacitive touch screen and a manufacturing method thereof are provided.
  • the capacitive touch screen includes a substrate, a plurality of touch units, a color layer, an electrode, and a plurality of touch unit traces.
  • the color layer is distributed in the frame area of the capacitive touch screen; the plurality of touch units form an array of the touch units; the touch unit traces extend from the respective touch units on the first surface of the substrate; and the color layer has an open a hole, the electrode is electrically connected to each touch unit trace in the opening of the color layer; the material of the electrode It is an ACP adhesive layer that conducts in a direction perpendicular to the first surface of the substrate and is non-conductive in a direction parallel to the first surface of the substrate.
  • the method mainly comprises the steps of: forming a touch unit and a touch unit trace on a substrate by using a photolithography, etching process or a screen printing process; and forming a color layer on the substrate by using a screen printing process;
  • the electrodes are fabricated using a screen printing process.
  • a single-chip capacitive touch screen and a manufacturing method thereof are provided.
  • the capacitive touch screen includes a substrate, a plurality of touch units, a color layer, a second color layer, a plurality of electrodes, and a plurality of touch unit traces.
  • the color layer and the second color layer are distributed in the frame area of the capacitive touch screen; the plurality of touch units form an array of the touch units; and the touch unit lines extend from the respective touch units on the first surface of the substrate;
  • the touch unit trace is partially covered by the color layer; the electrode partially covers the color layer, and is electrically connected to the touch unit trace at a portion where the touch unit trace is not covered by the color layer; the second color layer partially covers The touch unit traces the wires and electrodes and covers the color layer and partially exposes the respective electrodes.
  • the method mainly comprises the steps of: forming a touch unit and a touch unit trace on a substrate by using a photolithography, etching process or a screen printing process; forming a color layer on the substrate by using a screen printing process; The electrode is produced by a screen printing process; the second color layer is formed by a screen printing process.
  • a single-chip capacitive touch screen and a manufacturing method thereof are provided.
  • the capacitive touch screen includes a substrate, a plurality of touch units, a color layer, a plurality of electrodes, and a plurality of touch unit traces.
  • the color layer is distributed in the frame area of the capacitive touch screen; the plurality of touch units form an array of the touch unit; the plurality of touch unit traces extend from the respective touch units on the first surface of the substrate; and the color layer partially covers
  • Each of the touch unit lines has one or more through holes on the color layer of the touch unit trace; one end of the through hole is connected to the touch unit trace; the through hole has a conductor.
  • the conductor is also distributed outside the through hole, and the conductor outside the through hole partially covers the electrode in this embodiment;
  • Each of the electrodes is electrically connected to each of the touch unit wires through a conductor.
  • the method mainly comprises the steps of: forming a touch unit and a touch unit trace on a substrate by using a photolithography, etching process or a screen printing process; and forming a through hole on the substrate by using a screen printing process; a color layer; an electrode is formed on the color layer by a screen printing process, and a conductor is disposed in the through hole and on the electrode by a screen printing process.
  • a monolithic capacitive touch screen and a method of fabricating the same are provided
  • the substrate includes a plurality of touch units, a color layer, a plurality of electrodes, a plurality of touch unit traces, and a plurality of electrical conductors.
  • the plurality of touch units form an array of touch units, and the touch units are extended from the respective touch units on the first surface of the substrate; the color layer is distributed in the frame area of the capacitive touch screen, and has multiple passes thereon.
  • the method mainly comprises the steps of: forming a touch unit and a touch unit trace on a substrate by using a screen printing process; forming a conductive body on the touch unit trace by using a screen printing process; using a screen printing process A color layer having a through hole is formed; and an electrode is formed on the color layer by a screen printing process.
  • the monolithic capacitive touch screen of the present invention and the manufacturing method thereof enable the touch unit wiring to be sandwiched between the substrate and the color layer, and the process of forming the color layer is set in the manufacturing of the touch unit and the touch unit. After the process, in this way, the touch cell traces extend over the substrate without the need to step across the steps from the substrate to the color layer as in the prior art. Therefore, the problem of increasing process complexity and difficulty caused by the solution adopted in the prior art for solving the problem that the touch unit wiring crosses the step and the high temperature resistant ink is avoided.
  • the color layer covering the touch unit trace of the monolithic capacitive touch screen of the present invention can protect the touch unit traces to improve the reliability of the monolithic capacitive touch screen of the present invention.
  • the present invention sets the process of fabricating the color layer after the process of making the touch unit and the touch unit wiring, thereby reducing the influence of the temperature in the subsequent process on the color layer, so that the color layer is not easily discolored and does not change its insulating property. Avoid coating problems in traditional processes.
  • the monolithic capacitive touch screen of the present invention has a simple, reliable structure and low cost; and the manufacturing method of the monolithic capacitive touch screen of the present invention has fewer steps, is simple, and is easy to operate.
  • FIG. 1 is a front elevational view of a prior art monolithic capacitive touch screen.
  • Figure 2 is a cross-sectional view of the capacitive touch screen shown in Figure 1 in the AA' direction.
  • image 3 In a first embodiment, a front view of the monolithic capacitive touch screen of the present invention, wherein the portion of the touch unit trace covered by the color layer is indicated by a dashed line.
  • Figure 4 is a cross-sectional view of the capacitive touch screen shown in Figure 3 in the A1A1' direction.
  • FIG. 5 In a second embodiment, a front view of the monolithic capacitive touch screen of the present invention, wherein the portion of the touch unit trace covered by the color layer is indicated by a dashed line.
  • Figure 6 is a cross-sectional view of the capacitive touch screen shown in Figure 5 in the A2A2' direction.
  • Figure 7 In a third embodiment, a front view of the monolithic capacitive touch screen of the present invention, wherein the portion of the touch unit trace covered by the color layer is indicated by a dashed line.
  • Figure 8 is a cross-sectional view of the capacitive touch screen shown in Figure 7 in the A3A3' direction.
  • Figure 9 In a fourth embodiment, a front view of a one-piece capacitive touch screen of the present invention, wherein the portion of the electrode covered by the second color layer is indicated by a dashed line.
  • Figure 10 is a cross-sectional view of the capacitive touch screen shown in Figure 9 in the A4A4' direction.
  • Figure 11 shows the connection between the touch unit trace and the electrode
  • Figure 9 The distribution of electrodes, touch unit traces, and color layers on the capacitive touch screen is shown, wherein the portion of the touch unit trace that is covered by the color layer is indicated by a dashed line.
  • FIG. 12 In a fifth embodiment, a schematic view of the monolithic capacitive touch screen of the present invention is shown in the connection portion of the touch unit wiring and the electrodes.
  • Figure 13 is a cross-sectional view of the capacitive touch screen shown in Figure 12 in the BB' direction.
  • Figure 14 In a sixth embodiment, a front view of the connection portion of the touch unit cell and the electrode of the monolithic capacitive touch screen of the present invention, wherein the conductor and the touch unit trace are covered by the color layer and the electrode.
  • the dotted line indicates.
  • Figure 15 is a cross-sectional view of the capacitive touch screen shown in Figure 14 in the B1B1' direction.
  • the monolithic capacitive touch screen of the present invention includes a substrate 101, such as a touch unit.
  • the touch unit is composed of a driving portion and a sensing portion, such as the touch unit 102.
  • the driving layer and the sensing portion are formed;
  • the color layer 103 is an insulating layer distributed in a frame area of the capacitive touch screen; and the plurality of touch units form an array of the touch unit and distributed on the substrate 101.
  • the plurality of touch unit traces extend from the respective touch units to the bezel area on the first surface of the substrate 101, for example, the touch unit traces 120 are touched
  • Control unit The driving portion of the touch unit extends from the sensing portion of the touch unit 102; the color layer 103, the electrodes, and the touch unit are routed on the slave substrate 101.
  • the first surface is distributed along the normal direction of the first surface in the order of the touch unit traces, the color layer 103, and the electrodes, for example, as shown in FIG. 4, the color layer 103, the electrodes 141, and the touch unit traces.
  • the order of distribution in the normal direction from the first surface of the substrate 101 along the first surface is the touch unit trace 121, the color layer 103, and the electrode 141, and the substrate 101 in FIG.
  • the normal direction of the first surface is perpendicular to the paper surface, and the normal direction of the first surface of the substrate 101 is upward in FIG. 4; the color layer 103 Partially covering the touch unit traces (the 'cover' is based on the normal direction of the first surface, that is, when the normal direction of the first surface is upward, the upper layer covers the lower layer.
  • the portion of the touch unit trace in the visible area is not color layer 103 covering, in addition, a portion of the touch unit trace that coincides with the electrode in the normal direction of the first surface is also partially colored by the color layer 103 Covering; in this embodiment, the color layer 103 covering the touch unit traces overlapping the electrodes in the normal direction of the first surface has one or more through holes, that is, in the normal direction of the first surface , color layer 103 The portion sandwiched between the electrode and the touch unit trace has one or more through holes. As shown in FIG. 4, the color layer 103 is sandwiched between the electrode 141 and the touch unit trace 121.
  • Through hole 161 the through hole is sandwiched between the touch unit wiring and the electrode, preferably, the two ends thereof are respectively connected to the touch unit wiring and the electrode, as shown in FIG. 4, the through hole 161 One end portion (lower end portion) is in contact with the touch unit wiring 121, and the other end portion (upper end portion) of the through hole 161 is connected to the electrode 141.
  • the through hole has a conductor, and the touch unit is in contact with the trace of the touch unit, and the electrodes are electrically connected to the respective touch unit wires through the conductors in the respective through holes, as shown in the through hole 161 shown in FIG.
  • the conductor 171 is in contact with the touch unit trace 121 and the electrode 141, and the electrode 141 passes through the conductor 171 in the through hole 161 and the touch unit trace. Electrical connection. It should be noted that due to the influence of the process of filling the conductor into the through hole (for example, alignment deviation during screen printing, etc.), some of the conductor may be distributed outside the through hole, and at this time, the through hole is The upper end may not be connected to the electrode.
  • the color layer 103 is a case where a portion sandwiched between the electrode and the touch unit trace has a plurality of through holes, for example, the color layer 103 is sandwiched between the electrode 141 and the touch unit trace 121.
  • the case where the portion has a plurality of through holes is similar to the case of the above-mentioned one through hole, and the lower end portions of the through holes are connected to the touch unit wiring, and one or more of the through holes have conductors therein.
  • the conductor is connected to the touch unit wiring, and the electrode is connected to the conductor in the at least one through hole to be electrically connected to the touch unit wiring.
  • the material of the conductor may be selected from a carbon paste, a silver paste or a mixture of carbon paste and silver paste, and a color and color layer thereof.
  • the same color (the same color here means that the color difference between the two is below the level of small chromatic aberration, for example using CIE1976 (L*a*b*)
  • the color difference calculation formula of the color space or the color difference meter calculates or measures that the color difference value ⁇ E of the two is not more than 6, preferably not more than 3, and the description is also applicable to other parts of the text); It may be a color ink coating, a varnish coating or a photoresist coating, that is, a color ink 103 may be selected from a color ink, a varnish or a photoresist;
  • a tempered glass substrate, a tempered glass substrate or a common glass substrate may be selected, or a polymer material transparent substrate may be selected;
  • the touch unit and the touch unit trace are prepared by a conductive film, and the conductive film
  • the shorter electrode refers to the connection between the electrode and the touch unit trace to the electrode and
  • the length of the electrode between the junctions of the control circuits of the capacitive touch screen is not greater than 5mm, longer electrode means that the length is greater than 5mm.
  • the touch unit and the touch unit are routed on the substrate 101.
  • a fabrication process using a single-layer transparent conductive film is taken as an example, and the same layer of transparent conductive film is used to form a touch unit and a touch unit trace.
  • a piece of glass substrate is first taken as the substrate 101.
  • the tempered glass substrate, the tempered glass substrate or the ordinary glass substrate may be selected, or the transparent substrate of the polymer material may be selected as the substrate 101; then, the substrate 101 is cleaned, and the substrate to be cleaned is selected.
  • One surface of 101 is used as the first surface; then, a transparent conductive film is deposited on the first surface of the substrate 101.
  • an ITO film is deposited, and the thickness of the ITO film is 15 to 40 nm. , either 5 ⁇ 15nm or 40 ⁇ 60nm
  • a photoresist is coated on the conductive film, and photolithography is performed to form a pattern of the touch unit and the touch unit trace.
  • a yellow photolithography process is used.
  • the touch unit and the touch unit are removed.
  • Line pattern, remove photoresist, on substrate The first surface of the 101 forms a touch unit and a touch unit trace.
  • a conductive film of the pattern of the touch unit and the touch unit trace can be formed directly on the first surface of the substrate 101 by using a screen printing process, thereby The first surface of the 101 forms a touch unit and a touch unit trace.
  • a color layer 103 is formed on the substrate 101.
  • a color layer 103 patterned as a border region of the capacitive touch screen is formed on the first surface of the substrate 101 by a screen printing process. And having a through hole thereon; the through hole extends along a normal direction of the first surface, one end of which is connected to the touch unit trace, and the other end is used for contacting the electrode. Sandwiched between the electrode 141 and the touch unit trace as shown in FIG. A portion of the color layer 103 between 121 has a through hole 161.
  • the color layer 103 is formed by using a color ink, and the thickness of the color layer 103 is 1 to 40 ⁇ m.
  • the diameter of the through hole is 0.1 ⁇ 0.6mm.
  • the cross section of the formed through hole is not limited to a circular shape, and may be a shape of a rectangle, an ellipse or the like.
  • a conductor is placed in the through hole, and then an electrode is fabricated.
  • the material for preparing the conductor is filled in each of the through holes formed in the previous step by a screen printing process.
  • the carbon paste is selected as the material of the conductor, and the color thereof is the same as the color of the color layer 103; the filled conductor Height is 1 to 100 ⁇ m is preferably equal to the thickness of the color layer 103.
  • using a screen printing process in the color layer 103 The surface forms individual electrodes.
  • silver paste is selected as the material of the electrode, and the thickness of the electrode is 5 to 40 ⁇ m.
  • the electrode may be formed by laser etching, specifically: in the color layer 103 The surface forms a silver paste layer of the desired electrode thickness, and the silver paste layer is laser-etched to form respective electrodes on the surface of the color layer 103.
  • the material for preparing the conductor may be filled into the through hole by using a single screen printing process or a combination of screen printing and laser processing.
  • the color of the material of the electrode is preferably the color layer 103 has the same color. This method is particularly suitable for the case where the through hole is small, for example, the diameter of the through hole (or the side length of the polygonal through hole or the long axis of the elliptical through hole) is not more than 0.1 mm.
  • the diameter of the through hole is not more than 0.2 mm
  • the color difference ⁇ E between the filled conductor (or electrode) and the color layer 103 is preferably not more than 6; and the diameter of the through hole is not more than 0.05 mm
  • the color difference between the two Value ⁇ E Preferably no more than 10, or even the colors of the two can be completely different.
  • the color difference ⁇ E between the conductor (or electrode) filled therein and the color layer 103 is preferably not more than 3.
  • the electrode in order to prevent the electrode from being exposed to oxidation in the air, it is also possible to cover the electrode with an insulating layer covering the entire electrode except the external portion of the electrode, which is composed of color ink, varnish or color photosensitive glue. One or more of them are formed, the pattern of which may be the bezel area of the capacitive touch screen or only the electrodes.
  • the monolithic capacitive touch screen of the present invention includes a substrate 201, such as a touch unit.
  • the touch unit is composed of a driving part and a sensing part, such as the touch unit 202.
  • the driving unit and the sensing portion are formed; the plurality of touch units form an array of the touch units, and are distributed on the first surface of the substrate 201 and in the operable area of the capacitive touch screen; the plurality of touch units are routed on the substrate 201
  • the first surface of the touch unit extends from the touch unit.
  • the touch unit trace 220 extends from the driving portion of the touch unit 202, and the touch unit trace 221 extends from the touch unit 202.
  • the sensing portion extends; the color layer 203 partially covers the respective touch unit traces.
  • the portion of the touch unit trace in the visible region is not the color layer 203.
  • the portion of the touch unit trace that overlaps the electrode in the normal direction of the first surface is also not covered by the color layer 203.
  • the normal direction of the first surface of the substrate 201 is perpendicular to the paper surface.
  • the normal direction of the first surface of the substrate 201 is upward; in this embodiment, the color layer 203
  • the insulating layer is distributed in the frame area of the capacitive touch screen, and has an opening therein, and the lower edge of the opening is in contact with a touch unit wiring, as shown in FIG. 6 , the lower edge of the hole and the touch unit are Line 221 Contacting; each electrode is distributed in the frame area of the capacitive touch screen and at least partially in the corresponding opening to be in contact with the corresponding touch unit to achieve electrical connection with the corresponding touch unit wiring, as shown in FIGS. 5 and 6 Electrode shown 241 , which is partially in contact with the touch unit trace 221 and electrically connected in the opening 261 .
  • Figure 6 Shown in the figure is an opening corresponding to a touch unit trace and an electrode, the opening is a through hole, and a lower edge thereof is in contact with the touch unit trace, and the electrode is at least partially distributed in the opening
  • the hole is in contact with the touch unit line; it should be noted that the hole may also be composed of a plurality of through holes that are juxtaposed but not connected to each other, and the lower edges of the through holes are all connected to the touch unit.
  • the electrode is at least partially distributed in one or more of the vias to be in contact with the touch unit trace.
  • the opening of the former case will be referred to as a single hole opening, and the opening of the latter case will be referred to as a porous opening.
  • the material of the electrode is an ACP adhesive layer, or other anisotropic conductive layer, which is perpendicular to the substrate 201.
  • the direction of the first surface is electrically conductive, non-conductive in a direction parallel to the first surface of the substrate 201, and the color thereof is the same as the color of the color layer 203;
  • the color layer 203 It may be a color ink coating, a varnish coating or a photoresist coating, that is, a color ink 203 may be selected from a color ink, a varnish or a photoresist;
  • a tempered glass substrate, a tempered glass substrate or a common glass substrate may be selected, or a polymer material transparent substrate may be selected;
  • the touch unit and the touch unit trace are prepared by a conductive film, and the conductive film may be ITO Film, graphene layer, carbon nanotube layer, nano silver wire, metal mesh or other conductive material layer, that is, conductive film material can be selected from ITO , graphene, carbon nano
  • the electrode in the embodiment is short, and when the electrode is connected to the control circuit of the capacitive touch screen by means of welding, wire bonding, hot pressing or the like, the position of welding, wire bonding or hot pressing needs to be paid attention to ensure control.
  • the electrical connection between the electrodes through the electrodes and the corresponding touch unit, such as soldering, wire bonding or hot pressing, should be at an electrode portion that coincides with the corresponding touch unit trace in the normal direction of the first surface.
  • the touch unit and the touch unit are routed on the substrate 201.
  • a fabrication process using a single-layer transparent conductive film is taken as an example, and the same layer of transparent conductive film is used to form a touch unit and a touch unit trace.
  • a piece of glass substrate is first taken as the substrate 201.
  • the tempered glass substrate, the tempered glass substrate or the ordinary glass substrate may be selected, or the transparent substrate of the polymer material may be used as the substrate 201; then, the substrate 201 is cleaned, and the substrate to be cleaned is selected.
  • One surface of 201 is used as the first surface; then, a transparent conductive film is deposited on the first surface of the substrate 201.
  • an ITO film is deposited, and the thickness of the ITO film is 15 to 40 nm. , or 5 ⁇ 15nm, or 40 ⁇ 60nm
  • a photoresist is coated on the conductive film, and photolithography is performed to form a pattern of the touch unit and the touch unit trace.
  • a yellow photolithography process is used.
  • the touch unit and the touch unit are removed.
  • Line pattern, remove photoresist, on substrate The first surface of the 201 forms a touch unit and a touch unit trace.
  • a screen printing process can also be used directly on the substrate 201 A transparent conductive film of a pattern of the touch unit and the touch unit trace is formed on the first surface, thereby forming a touch unit and a touch unit trace on the first surface of the substrate 201.
  • a color layer 203 is formed on the substrate 201.
  • a color layer 203 patterned as a border region of the capacitive touch screen is formed on the first surface of the substrate 201 by a screen printing process. , having an opening therein, the opening may be a single hole opening or a porous opening; the opening is for accommodating at least a part of the electrode, and the color layer 203 as shown in FIG. 6 has an opening 261 for Accommodating electrode 241 .
  • the color layer 203 is formed by using a color ink, and the thickness of the color layer 203 is 5 to 40 ⁇ m.
  • the length and width of the opening are respectively equal to or slightly larger than the length and width of the electrode it accommodates (for example, no more than 30% of the length and width of the electrode) ) to suitably accommodate the electrodes, the height of the openings may be greater than or less than or equal to the height of the electrodes, such as the openings 261 accommodating the electrodes 241 .
  • the aperture can also accommodate a portion of the electrode.
  • the cross section of the formed opening i.e., the cross section parallel to the first surface
  • the third step is to make an electrode.
  • the respective electrodes are formed using a screen printing process, and the respective electrodes are at least partially distributed in the respective respective openings.
  • the ACP glue which is formed to conduct electricity in a direction perpendicular to the first surface of the substrate 201, is non-conductive in a direction parallel to the first surface of the substrate 201, and has an electrode thickness of 5 to 40 ⁇ m.
  • the cross section ie, the section parallel to the first surface
  • the cross section of the electrode is not limited to a rectangle, and may be a shape of a circle, an ellipse or the like.
  • Color and color layer of the electrode in the opening 203 The colors are the same. It should be noted that when the opening is a porous opening, in the case where the through hole constituting the porous opening is small, for example, the diameter of each through hole (or the side length of the polygonal through hole, or the elliptical through hole) Long axis) is not greater than In the case of 0.2 mm, the color difference ⁇ E between the electrode and the color layer 203 is preferably not more than 6; the diameter of the through hole (or the side length of the polygonal through hole, or the long axis of the elliptical through hole) no greater than In the case of 0.05 mm, the color difference ⁇ E between the two is preferably not more than 10 Even the colors of the two can be completely different.
  • the color difference ⁇ E between the electrode and the color layer 203 is Preferably it is no more than 3.
  • the electrode in order to prevent the electrode from being exposed to oxidation in the air, it is also possible to cover the electrode with an insulating layer covering the entire electrode except the external portion of the electrode, which is composed of color ink, varnish or color photosensitive glue. One or more of them are formed, the pattern of which may be the bezel area of the capacitive touch screen or only the electrodes.
  • the monolithic capacitive touch screen of the present invention includes a substrate 301, such as a touch unit. 302 multiple touch units, color layer 303, electrode 340, and multiple touch unit traces.
  • the touch unit is composed of a driving part and a sensing part, such as the touch unit 202.
  • the driving unit and the sensing part are formed; the plurality of touch units form an array of touch units, which are distributed on the first surface of the substrate 301 and in the operable area of the capacitive touch screen; and the plurality of touch units are routed on the substrate 301.
  • the first surface of the touch unit extends from the touch unit.
  • the touch unit trace 320 extends from the driving portion of the touch unit 302, and the touch unit trace 321 extends from the touch unit 302.
  • the sensing portion extends; the color layer 303 partially covers the respective touch unit traces. Specifically, the portion of the touch unit traces in the visible region is not the color layer 303.
  • the portion of the touch unit trace that overlaps the electrode in the normal direction of the first surface is also not covered by the color layer 303. In FIG. 7, the normal direction of the first surface of the substrate 301 is perpendicular to the paper surface.
  • the normal direction of the first surface of the middle substrate 301 is upward; in this embodiment, the color layer 303
  • the insulating layer is disposed in the frame area of the capacitive touch screen, and has an opening therein. The lower edge of the opening is in contact with each of the touch unit wires. Preferably, each touch unit line is exposed to the opening.
  • each of the touch unit traces has a portion exposed in the opening 360; the electrodes are distributed in the frame area of the capacitive touch screen and at least partially in the opening 360 Internally contacting the touch units of the respective touch units to realize electrical connection with the traces of the respective touch units, as shown in FIG. 8 , the electrodes 340 are partially in the openings 360 , such as the touch unit traces 321 , 331 Each touch unit is in line contact and electrical connection.
  • the opening is a single hole opening corresponding to the plurality of touch unit wires and an electrode, and the lower edge of the opening is in contact with the respective touch unit wires, and the electrodes are at least partially distributed in the opening.
  • the holes are in contact with the respective touch unit lines; the openings may also be porous openings, and the electrodes are at least partially distributed in the through holes constituting the porous openings to be in contact with the respective touch unit wires, specifically,
  • Each of the touch unit traces corresponds to a portion of the plurality of through holes constituting the porous opening, and a portion of the electrode distributed in the portion of the through holes is in contact with the touch unit wiring.
  • the material of the electrode is an ACP adhesive layer, or other anisotropic conductive layer, which is perpendicular to the substrate 301.
  • the direction of the first surface is electrically conductive, non-conductive in a direction parallel to the first surface of the substrate 301, and its color is the same as the color of the color layer 303;
  • the color layer 303 It may be a color ink coating, a varnish coating or a photoresist coating, that is, a color ink 303 may be selected from a color ink, a varnish or a photoresist;
  • the substrate 301 A tempered glass substrate, a tempered glass substrate or a common glass substrate may be selected, or a polymer material transparent substrate may be selected;
  • the touch unit and the touch unit trace are prepared by a conductive film, and the conductive film may be ITO Film, graphene layer, carbon nanotube layer, nano silver wire, metal mesh or other conductive material layer, that is, conductive film material can be selected from ITO , graphene
  • the electrode in the embodiment is short.
  • the control circuit of the capacitive touch screen is connected by soldering, wire bonding, hot pressing, etc., it is necessary to pay attention to the position of welding, wire bonding or hot pressing to ensure the control of the capacitive touch screen.
  • the electrical connection between the electrodes through the electrodes and the corresponding touch unit, such as soldering, wire bonding or hot pressing, should be at an electrode portion that coincides with the corresponding touch unit trace in the normal direction of the first surface.
  • the touch unit and the touch unit are routed on the substrate 301.
  • a fabrication process using a single-layer transparent conductive film is taken as an example, and the same layer of transparent conductive film is used to form a touch unit and a touch unit trace.
  • a glass substrate is first taken as the substrate 301.
  • the tempered glass substrate, the tempered glass substrate or the ordinary glass substrate may be selected, or the transparent substrate of the polymer material may be used as the substrate 301; then, the substrate 301 is cleaned, and the substrate to be cleaned is selected.
  • One surface of 301 is used as the first surface; then, a transparent conductive film is deposited on the first surface of the substrate 301.
  • an ITO film is deposited, and the thickness of the ITO film is 15 to 40 nm. , or 5 ⁇ 15nm, or 40 ⁇ 60nm
  • a photoresist is coated on the conductive film, and photolithography is performed to form a pattern of the touch unit and the touch unit trace.
  • a yellow photolithography process is used.
  • the touch unit and the touch unit are removed.
  • Line pattern, remove photoresist, on substrate The first surface of the 301 forms a touch unit and a touch unit trace.
  • a screen printing process can also be used directly on the substrate 301.
  • a transparent conductive film of a pattern of the touch unit and the touch unit trace is formed on the first surface, thereby forming a touch unit and a touch unit trace on the first surface of the substrate 301.
  • a color layer 303 is formed on the substrate 301.
  • a color layer 303 patterned as a border region of the capacitive touch screen is formed on the first surface of the substrate 301 by a screen printing process. Having an opening therein, the opening may be a single hole opening or a porous opening; the opening is for accommodating at least a portion of the electrode, and the color layer 303 shown in FIG. 8 has an opening 360.
  • the opening may be a single hole opening or a porous opening; the opening is for accommodating at least a portion of the electrode, and the color layer 303 shown in FIG. 8 has an opening 360.
  • a color layer 303 is formed by using a color ink, and the thickness of the color layer 303 is 5 to 40 ⁇ m, and the opening 360
  • the length and width are respectively equal to or slightly larger than the length and width of the electrode they accommodate (for example, no more than 30% of the length and width of the electrode)
  • the height of the apertures may be greater than or less than or equal to the height of the electrodes, such as apertures 360 accommodating electrodes 340 .
  • the aperture can also accommodate a portion of the electrode.
  • the cross section of the formed opening i.e., the cross section parallel to the first surface
  • the third step is to make an electrode.
  • the electrodes are formed using a screen printing process, and the electrodes are at least partially distributed within the openings.
  • ACP is adopted.
  • the glue which is formed to be electrically conductive in a direction perpendicular to the first surface of the substrate 301, is non-conductive in a direction parallel to the first surface of the substrate 301, and has an electrode thickness of 5 to 40 ⁇ m.
  • the cross section ie, the section parallel to the first surface
  • the cross section of the electrode is not limited to a rectangle, and may be a shape of a circle, an ellipse or the like.
  • Color and color layer of the electrode in the opening 303 The colors are the same. It should be noted that when the opening is a porous opening, in the case where the through hole constituting the porous opening is small, for example, the diameter of each through hole (or the side length of the polygonal through hole, or the elliptical through hole) Long axis) is not greater than In the case of 0.2 mm, the color difference ⁇ E between the electrode and the color layer 303 is preferably not more than 6; the diameter of the through hole (or the side length of the polygonal through hole, or the long axis of the elliptical through hole) no greater than In the case of 0.05 mm, the color difference ⁇ E between the two is preferably not more than 10 Even the colors of the two can be completely different.
  • the color difference between the electrode and the color layer 303 is ⁇ E.
  • ⁇ E the diameter of the through hole (or the side length of the polygonal through hole or the long axis of the elliptical through hole)
  • it is no more than 3.
  • the electrode in order to prevent the electrode from being exposed to oxidation in the air, it is also possible to cover the electrode with an insulating layer covering the entire electrode except the external portion of the electrode, which is composed of color ink, varnish or color photosensitive glue. One or more of them are formed, the pattern of which may be the bezel area of the capacitive touch screen or only the electrodes.
  • the monolithic capacitive touch screen of the present invention comprises a substrate 401, such as a touch unit.
  • the plurality of touch units of 402 include a color layer 413, a second color layer 423, a plurality of electrodes such as electrodes 440 and 441, and a plurality of touch unit traces.
  • the color layer 413 And the second color layer 423 is an insulating layer distributed in a frame area of the capacitive touch screen;
  • the touch unit is composed of a driving portion and a sensing portion, such as the touch unit 402
  • the driving unit and the sensing part are formed;
  • the plurality of touch units form an array of the touch units, which are distributed on the first surface of the substrate 401 and in the operable area of the capacitive touch screen; and the plurality of touch units are routed on the substrate 401
  • the first surface of the touch unit extends from the touch unit to the frame area.
  • the touch unit line 420 extends from the driving portion of the touch unit 402, and the touch unit line 421 extends from the touch unit 402.
  • the sensing portion extends; the color layer 413 partially covers the respective touch unit traces. Specifically, the portion of the touch unit traces in the visible region is not the color layer 413. Covering; in addition, the end of the touch unit trace may also be partially covered by the color layer 413, as shown in FIGS. 10 and 11 As shown, portions of the respective touch unit traces that coincide with the electrodes in the normal direction of the first surface are partially covered by the color layer 413; in FIGS. 9 and 11 the substrate 401 The normal direction of the first surface is perpendicular to the paper surface, and the normal direction of the first surface of the substrate 401 is upward in FIG.
  • the electrode partially covers the color layer 413 And the touch unit trace is electrically connected at a portion of the touch unit trace that is not covered by the color layer 413; the second color layer 423 partially covers the touch unit trace, the electrode, and the color layer 413 And exposing a portion of each electrode for connecting a control circuit of the capacitive touch screen (in this embodiment, as shown in FIG. 9 As shown, portions of the electrodes that are electrically connected to the touch cell traces are also exposed, but in other embodiments of the invention these portions may not be exposed). In this embodiment, as shown in FIG. As shown, the touch unit trace 421 that coincides with the electrode 441 in the normal direction of the first surface is partially covered by the color layer 413; the electrode 441 partially covers the color layer 413.
  • touch unit wiring 421 is in contact with and electrically connected to the portion of the touch unit trace 421 that is not covered by the color layer 413; the second color layer 423 partially covers the touch unit trace 421, the electrode 441 and color layer 413 partially expose electrode 441.
  • the color layer 413 and the second color layer 423 may be a color ink coating, a varnish coating or a photoresist coating, that is, a color layer.
  • the color of the 413 and the second color layer 423 may be color ink, varnish or photoresist, color layer 413 and second color layer 423
  • the color of the electrode is the same; the material of the electrode may be any one of silver paste and carbon paste or a mixture of silver paste and carbon paste. Specifically, when the electrode is short, silver paste, carbon paste or silver paste and carbon paste may be used.
  • the color and color layer of the electrode 413 and the second color layer 423 have the same color;
  • the substrate 401 A tempered glass substrate, a tempered glass substrate or a common glass substrate may be selected, or a polymer material transparent substrate may be selected;
  • the touch unit and the touch unit trace are prepared by a conductive film, and the conductive film may be ITO Film, graphene layer, carbon nanotube layer, nano silver wire, metal mesh or other conductive material layer, that is, conductive film material can be selected from ITO , graphene, carbon nanotubes, nano silver wires, metal mesh or other conductive materials.
  • the touch unit and the touch unit are routed on the substrate 401.
  • a fabrication process using a single-layer transparent conductive film is taken as an example, and the same layer of transparent conductive film is used to form a touch unit and a touch unit trace.
  • a piece of glass substrate is first taken as the substrate 401.
  • the tempered glass substrate, the tempered glass substrate or the ordinary glass substrate may be selected, or the transparent substrate of the polymer material may be used as the substrate 401; then, the substrate 401 is cleaned, and the substrate to be cleaned is selected.
  • One surface of 401 is used as the first surface; then, a transparent conductive film is deposited on the first surface of the substrate 401.
  • an ITO film is deposited, and the thickness of the ITO film is 15 to 40 nm. , either 5 ⁇ 15nm or 40 ⁇ 60nm
  • a photoresist is coated on the conductive film, and photolithography is performed to form a pattern of the touch unit and the touch unit trace.
  • a yellow photolithography process is used.
  • the touch unit and the touch unit are removed.
  • Line pattern, remove photoresist, on substrate The first surface of the 401 forms a touch unit and a touch unit trace.
  • a screen printing process can also be used directly on the substrate 401
  • a transparent conductive film of a pattern of the touch unit and the touch unit trace is formed on the first surface, thereby forming a touch unit and a trace on the first surface of the substrate 401.
  • a color layer 413 is formed on the substrate 401.
  • a color layer 413 is formed on the first surface of the substrate 401 by a screen printing process. It partially covers the touch units of each touch unit.
  • the color layer 413 is formed by using a color ink, and the thickness of the color layer 413 is 5 to 40 ⁇ m; As shown, it is stepped at the junction of the touch unit traces and the electrodes for making the electrodes only in contact with the touch unit designed to be electrically connected thereto, in other embodiments the color layer 413 Other shapes are also possible as long as they enable the electrodes to be in line contact with only the touch unit designed to be electrically connected thereto.
  • the third step is to make an electrode.
  • a first surface of the substrate 401, a touch unit trace, and a color layer 413 are employed by a screen printing process.
  • An electrode is formed on it.
  • a silver paste is used, the color of which is the same as that of the color layer 413 and the second color layer 423, and the thickness of the electrode is 5 to 40 ⁇ m.
  • the electrode may be formed by laser etching, specifically: the first surface of the substrate 401, the touch unit trace, and the color layer 413.
  • a layer of silver paste is formed on the desired electrode thickness, and a silver paste layer is laser-etched to form respective electrodes.
  • the fourth step is to make a second color layer 423.
  • a first surface of the substrate 401, a touch unit trace, an electrode, and a color layer 413 are employed by a screen printing process.
  • a second color layer 423 is formed on the frame region of the capacitive touch screen, and has an opening thereon; the second color layer 423 partially covers the substrate 401
  • the first surface, the respective touch unit traces and electrodes at least partially cover the color layer 413.
  • the second color layer 423 is formed by using a color ink, and the thickness of the second color layer 423 is 5 ⁇ 40 ⁇ m (It should be noted that Fig. 10 is a schematic diagram.
  • the thickness of the second color layer 423 may be smaller than the thickness of the electrode); the second color layer 423
  • the upper opening is for exposing portions of the respective electrodes for connecting the control circuit of the capacitive touch screen and portions of the respective electrodes electrically connected to the touch unit traces.
  • the second color layer 423 Other shapes may be used as long as they are with the previously created color layer 413
  • the pattern of the combined layer is the bezel area of the capacitive touch screen, and the combined layer has openings therein to expose portions of the respective electrodes for connecting the control circuitry of the capacitive touch screen.
  • the second color layer 423 Covering the entire electrode except the external portion of the electrode, it can be used to prevent the electrode from being oxidized by exposure to air.
  • the electrode other than the external portion of the electrode is not present in the second color layer 423
  • an insulating layer is formed by one or more of a color ink, a varnish or a color photoresist, and the pattern may be a frame area of the capacitive touch screen or only cover the electrode or cover only the above-mentioned electrode without the second color layer. 423 covered part.
  • the color layer 413 and the second color layer 423 are replaceable with each other, that is, the second color layer 523.
  • the color layer 513 as the color layer as the second color layer does not affect the implementation of the present invention.
  • the fifth preferred embodiment is similar to the first preferred embodiment in which the monolithic capacitive touch screen of the present invention includes a substrate 501 a plurality of touch units, a color layer 503, a plurality of vias such as vias 561, a plurality of electrodes such as electrodes 541, and a plurality of traces such as touch unit traces 521, color layer 503 It is an insulating layer distributed in the frame area of the capacitive touch screen.
  • the through hole has a conductor, and the conductor is connected to the touch unit wiring.
  • the through hole 561 has a conductor 571, and the conductor 571 and the touch unit are routed. Docked.
  • the conductors in this embodiment are also distributed outside the through holes, and the conductors distributed outside the through holes are in contact with the electrodes, whereby the respective electrodes are electrically connected to the respective wires through the conductors.
  • the conductor 571 is also distributed outside the through hole 561
  • the conductor 571 disposed outside the through hole 561 covers the electrode 541
  • the electrode 541 is routed through the conductor 571 and the touch unit. Electrical connection.
  • the touch unit trace can also correspond to multiple a through hole, the touch unit trace is connected to the lower end of the through hole, one or more of the through holes have a conductor therein, the conductor is connected to the touch unit trace, and the corresponding electrode and the at least one The conductors in the through holes are connected to be electrically connected to the touch unit wiring.
  • the materials for preparing the components of the monolithic capacitive touch screen of the present invention are the same as those of the first embodiment, and are not described herein.
  • Specific steps for fabricating the capacitive touch screen of the present embodiment include:
  • the first step is to make a touch unit and a touch unit trace on the substrate 501;
  • a color layer 503 is formed on the substrate 501;
  • an electrode is formed on the color layer 503, and a conductor is disposed in the through hole and on the electrode.
  • a screen printing process is employed in the color layer 103.
  • the surface forms individual electrodes.
  • silver paste is selected as the material of the electrode, and the thickness of the electrode is 5-40 ⁇ m.
  • each of the through holes formed in the second step is filled with a material for preparing the conductor by a screen printing process.
  • silver paste is selected as the material of the conductor, and the color and color layer thereof is 503.
  • the color of the filled conductor is higher than the height of the color layer, preferably 1 to 45 ⁇ m; the conductor covers the electrode, and the thickness of the conductor preferably covering the electrode is 1 to 15 ⁇ m.
  • the present embodiment shows a case where a conductor portion distributed outside the through hole covers the electrode, but in other embodiments, the electrode may be over the conductor portion or the electrode and the conductor. Partially adjacent, as long as the two are in contact.
  • the user can adjust the operation steps in the third step correspondingly, and it is feasible to arrange the conductor after the electrode is fabricated or to form the electrode after the conductor is first disposed.
  • the monolithic capacitive touch screen of the present invention includes a substrate 601. a plurality of touch units, a color layer 603, a plurality of electrodes such as electrodes 641, a plurality of touch unit traces such as touch unit traces 621, and a plurality of conductors such as conductors 671.
  • the substrate 601 The structure, the pattern, and the distribution of the touch unit, the electrode, and the touch unit are the same as those in the first embodiment, and are not described here.
  • the color layer 603 is an insulating layer distributed in the frame area of the capacitive touch screen and has a through hole therein, such as a through hole. 661.
  • a plurality of touch unit traces extend from the driving portion and the sensing portion of each touch unit to respective through holes on the color layer 603.
  • the touch unit trace 621 extends to the through hole. 661; each touch unit trace is covered by a conductor at each through hole, one end surface of the conductor is connected to the touch unit trace, and the other end surface of the conductor is connected to the through hole, specifically, the electrical conductor The other end face The lower ends of the through holes are connected to each other, and the conductive body prevents the touch unit wires from contacting the edges of the through holes.
  • the touch unit traces 621 are covered by the conductors 671, and the conductive body 671 traces the touch units.
  • the electrodes are not in contact with the edges of the through holes 661; each of the electrodes has a portion in the corresponding through hole and is in contact with each of the conductors, for example, the electrode 641 has a portion in the through hole 661 and the conductor 661 Docked.
  • the above description describes a case where the conductor covering one of the touch unit traces corresponds to one through hole and is in contact with the lower end portion of the through hole.
  • the conductor may correspond to a plurality of through holes.
  • the conductive body is connected to the lower end portions of the through holes, and the corresponding electrodes enter the at least one through hole to be in contact with the conductive body to be electrically connected to the touch unit wiring.
  • Substrate 601 in this embodiment The materials of the touch unit, the color layer, the electrodes, and the touch unit are the same as those of the first embodiment. It is not mentioned here that the material of the conductor may be carbon paste, silver paste or anisotropic conductive adhesive (Anisotropic). Conductive Pastes, ACP or Anisotropic Conductive Films, ACF) or carbon paste, silver paste and Any two or three mixtures of anisotropic conductive pastes, specifically, silver paste, carbon paste or anisotropic conductive paste, or carbon paste, silver paste, and Any two or three mixtures of anisotropic conductive pastes, preferably silver paste when the electrodes are long.
  • Conductive Pastes, ACP or Anisotropic Conductive Films, ACF Anisotropic Conductive Films, ACF
  • Any two or three mixtures of anisotropic conductive pastes specifically, silver paste, carbon paste or anisotropic conductive paste, or carbon paste, silver paste, and Any two or three mixtures of anisotropic conductive
  • the control circuit can realize electrical connection with the corresponding touch unit through the electrode, for example, soldering, wire bonding or hot pressing.
  • the position of the electrodes of the external circuit should be located at the electrode portion that coincides with the corresponding touch unit trace in the normal direction of the first surface. Color and color layer of each electrode The color of 603 is the same.
  • the touch unit and the touch unit are routed on the substrate 601.
  • a fabrication process using a single-layer conductive film is taken as an example, and the same layer of conductive film is used to form a touch unit and a touch unit trace.
  • a piece of glass substrate is first taken as the substrate 601.
  • the tempered glass substrate, the tempered glass substrate or the ordinary glass substrate may be selected, or the transparent substrate of the polymer material may be used as the substrate 601; then, the substrate 601 is cleaned, and the substrate to be cleaned is selected.
  • One surface of 601 is used as the first surface; then, a conductive film is deposited on the first surface of the substrate 601.
  • an ITO film is deposited, and the thickness of the ITO film is 5 to 60 nm.
  • a photoresist is coated on the conductive film, and photolithography is performed to form a pattern of the touch unit and the touch unit trace. In this embodiment, a yellow photolithography process is used.
  • the touch unit and the touch unit are removed.
  • Line pattern, remove photoresist, on substrate The first surface of the 601 forms a touch unit and a touch unit trace.
  • a conductive film of the pattern of the touch unit and the touch unit trace can be directly formed on the first surface of the substrate 601 by a screen printing process, thereby being on the substrate.
  • the first surface of the 601 forms a touch unit and a touch unit trace.
  • the line width of each touch unit trace is 0.003-0.1 mm, and the pitch is 0.03-0.8 mm. .
  • an electrical conductor is formed on the touch unit trace.
  • a conductive body is formed at the end of each touch unit trace (the end of the non-connected touch unit) by a screen printing process, and the color thereof is followed by a color layer 603 prepared.
  • the colors are the same.
  • the cross section of the electrical conductor ie, the cross section parallel to the first surface
  • the cross section of the electrical conductor may also be rectangular, elliptical or the like.
  • a color layer 603 is formed on the substrate 601, and the color layer 603 has a through hole.
  • a color layer of a frame region of the capacitive touch screen is formed on the first surface of the substrate 601 by a screen printing process.
  • the through hole extends along a normal direction of the first surface, one end of which is in contact with the electrical conductor and the other end of which is adapted to be in contact with the electrode.
  • the cross-section of the through-hole formed may also be rectangular, elliptical, or the like.
  • the shape is selected to match the shape of the electrical conductor.
  • an electrode is fabricated, and the electrode is connected to the electrical conductor through the through hole.
  • a silver paste is used, and a screen printing process is employed in the color layer 603.
  • the electrode is formed on the electrode, and the portion of the electrode designed to be distributed in the through hole is aligned with the through hole, and the thickness of the electrode is 5-40 ⁇ m.
  • the electrode may be formed by laser etching, specifically: in the color layer 603
  • the surface forms a silver paste layer of the desired electrode thickness, and the silver paste layer is laser-etched to form respective electrodes on the surface of the color layer 603.
  • the electrode in order to prevent the electrode from being exposed to oxidation in the air, it is also possible to cover the electrode with an insulating layer covering the entire electrode except the external portion of the electrode, which is composed of color ink, varnish or color photosensitive glue. One or more of them are formed, the pattern of which may be the bezel area of the capacitive touch screen or only the electrodes.

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Abstract

本发明公开了一种单片式电容触摸屏,包括基板、触控单元、绝缘层、电极和触控单元走线;触控单元和绝缘层分布在基板的第一表面上,前者在可操作区域,后者在边框区;触控单元走线在第一表面上从触控单元延伸;在边框区,绝缘层部分地覆盖触控单元走线,电极与触控单元走线在触控单元走线未被绝缘层覆盖的部分处电连接。本发明公开制作方法为将制作绝缘层的工序设置在触控单元和触控单元走线的工序之后。本发明解决了一般颜色油墨、光油或颜色感光胶制作的绝缘层因耐高温性能不佳而变色和绝缘性能下降的问题,并避免了传统制程中的镀膜难题和触控单元走线跨台阶的问题。本发明的单片式电容触摸屏结构简单、可靠;其制作方法工序少、易于操作。

Description

单片式电容触摸屏及其制作方法
技术领域
本发明涉及一种电容触摸屏,尤其涉及一种单片式电容触摸屏及其制作方法。
背景技术
触摸屏作为一种新型的人机交互界面,广泛地应用于各种数字信息系统上,从小型产品如手机、数码产品,到中型产品如车载导航仪、平板电脑、游戏机、家用电器,再到大型产品如公共查询系统、便携电脑、医疗仪器上都可以看到触摸屏产品,市场前景十分可观。根据其工作原理,触摸屏主要分为电阻触摸屏(又称电阻屏)和电容触摸屏(又称电容屏)两大类。其中电容触摸屏由于其具有精确度高、使用寿命长以及可实现多点触控的优点,已成为触摸屏市场,尤其是手机触摸屏以及平板电脑触摸屏市场上的主流产品。
当前电容触摸屏可分两类:表面电容式和投射电容式,后者占据主导地位。在本文中,如无指出,提到的电容触摸屏皆为投射电容式触摸屏。
电容触摸屏的构造主要是在玻璃屏幕上镀一层或两层透明的薄膜导体层,例如 ITO (氧化铟锡)层,导体层上形成触控单元的阵列,通过在触摸屏的一条或多条侧边上制作与触控图案相连的多个电极以连接电容触摸屏的控制电路来对触控单元的阵列施加以及提取电信号。在触摸屏幕时,由于人体电场,手指与触控单元间会形成一个耦合电容,通过计算离开各个电极的电流的比例及强弱,可以准确获得触摸点的位置。
近年来,电容触摸屏领域发展出了单片式( One Glass Solution, OGS )电容触摸屏,其只采用一片玻璃基板,在该片玻璃基板的表面形成 ITO 触控单元的阵列并同时起到作为保护玻璃的作用。由于相对于常规的采用两层玻璃制作的电容触摸屏,这种电容触摸屏节约了一片玻璃基板,其结构简单,轻、薄且透光性好,由此降低了生产成本并提高了产品合格率。
图 1 和 2 示意性地示出了一个 OGS 电容触摸屏的构造,在基板 1 表面的中间区域为触摸屏的可操作区域( AA ),由 ITO 薄膜形成的如触控单元 2 的多个触控单元的阵列分布于可操作区域内,这里显示的触控单元 2 由驱动部分和感应部分构成;可视区域( VA )外围的边框区( BM )具有绝缘的颜色层 3 ;颜色层 3 上具有多个电极,包括和触控单元的驱动部分相连的电极以及和触控单元的感应部分相连的电极,如电极 40 以及电极 41 ,前者给一列触控单元的驱动部分提供电信号(驱动信号),后者将各个触控单元的感应部分的电信号(感应信号)引出;或者反之,前者将一列触控单元的感应部分的电信号(感应信号)引出,后者给各个触控单元的驱动部分提供电信号(驱动信号);各个电极用于连接电容触摸屏的控制电路和触控单元走线,用于连接电极与控制电路的连接方式诸如焊接、打线、热压等,其中热压是指通过加热压合使电容触摸屏的电极与控制电路的电极贴合导通(在本文中,用于与控制电路连接的电极部分称作电极的外接部分);各个触控单元走线在基板 1 上从各个触控单元的驱动部分和感应部分延伸,其端部分别与各个电极电连接。例如触控单元走线 20 从触控单元 2 的驱动部分延伸,其端部与电极 40 电连接;触控单元走线 21 从触控单元 2 的感应部分延伸,其端部与电极 41 电连接。图中示出的各触控单元走线与各触控单元一体成形,例如,由如 ITO 薄膜的透明导电薄膜一次光刻形成。
从剖面图图 2 上可以看出,如触控单元走线 21 的各个走线在从触控单元延伸到诸如电极 41 的各个电极处的路径中,需要跨过从基板 1 到颜色层 3 的台阶,台阶的高度为颜色层 3 的厚度。由于现有制作颜色层的工艺获得的颜色层 3 的厚度通常为微米级,即颜色层的厚度在 1.0~50.0um ;而现有制作的触控走线通常通过刻蚀制作触控单元的 ITO 薄膜获得,由于一般 ITO 薄膜的厚度为 15~30nm ,由此在基板 1 上沉积 15~10nm 厚的 ITO 薄膜时,该 ITO 薄膜需要跨过 1.0~50.0um 高的台阶,其易于在此台阶处发生断裂,而致使刻蚀制备的触控走线出现断裂的问题。另外,由于颜色层 3 先于 ITO 薄膜沉积在基板 1 上,这就要求完成颜色层 3 的工序之后的工艺温度不能过高,以免高温引起颜色层 3 的性能和颜色变化,如绝缘性下降和变黄。现有技术中对这些问题的解决方法是通过在 ITO 薄膜之前沉积一层诸如 OC 胶或其它透明材料的透明薄膜以填平该台阶,并在颜色层 3 的工序之后采用低温镀膜的沉积工艺制备 ITO 薄膜(以及诸如 OC 胶或其它透明材料的透明薄膜)。但这种方法增加了工序,要求耐高温的颜色层材料,甚至还需要使用低温镀膜工艺。将基板运送到镀膜工艺线甚至外厂的镀膜工艺线来完成对基板的镀膜无疑增加了 OGS 电容触摸屏的制作工艺的难度和复杂性。
因此,本领域的技术人员致力于开发一种单片式电容触摸屏及其制作方法,其避免了耐高温材料的颜色层和镀膜工艺,也不需要触控单元走线跨过从基板到颜色层的台阶。
发明内容
有鉴于现有技术的上述缺陷,本发明所要解决的技术问题是提供一种单片式电容触摸屏及其制作方法,通过将制作颜色层的工序设置在制作触控单元和触控单元走线的工序之后,避免了耐高温材料的颜色层和镀膜工艺,同时使触控单元走线无需跨过从基板到颜色层的台阶。
为实现上述目的,本发明提供了一种电容触摸屏, 包括基板、触控单元、绝缘层、电极和触控单元走线,所述触控单元和所述绝缘层分布在所述基板的第一表面上,所述触控单元分布在所述电容触摸屏的可操作区域内,所述绝缘层分布在所述电容触摸屏的边框区,其特征在于,所述触控单元走线在所述第一表面上从所述触控单元延伸;在所述边框区,所述绝缘层部分地覆盖所述触控单元走线,所述电极与所述触控单元走线在所述触控单元走线未被所述绝缘层覆盖的部分处电连接 。
进一步地, 所述绝缘层是由 颜色油墨、光油或颜色感光胶中的一个或多个形成的颜色层。
可选地,所述颜色层上具有一个或多个通孔,所述一个或多个通孔的一个端部与所述触控单元走线相接,所述一个或多个通孔沿所述第一表面的法线方向延伸。
进一步地, 所述电极在所述颜色层上延伸并进入所述 一个或多个 通孔内,所述电极在所述 一个或多个 通孔内的部分与所述触控单元走线接触。
进一步地,提供了一种电容触摸屏的制作方法,用于制作所述的电容触摸屏,其特征在于,包括:
第一步、在所述基板上制作所述触控单元和所述触控单元走线;
第二步、在所述基板上制作所述颜色层,所述颜色层上具有所述一个或多个通孔;
第三步、制作所述电极,所述电极部分地分布在所述一个或多个通孔内。
可选地, 所述电极在所述颜色层上延伸;所述 一个或多个 通孔内有导体,所述电极至少部分地覆盖所述导体并通过所述导体与所述触控单元走线电连接。
进一步地,提供了一种电容触摸屏的制作方法,用于制作所述的电容触摸屏,其特征在于,包括:
第一步、在所述基板上制作所述触控单元和所述触控单元走线;
第二步、在所述基板上制作所述颜色层,所述颜色层上具有所述一个或多个通孔;
第三步、在所述颜色层上制作所述电极,以及布置所述导体。
可选地, 所述导体还分布在所述 一个或多个 通孔之外,所述导体在所述 一个或多个 通孔之外的部分与所述电极相接触。
进一步地,提供了一种电容触摸屏的制作方法,用于制作所述的电容触摸屏,其特征在于,包括:
第一步、在所述基板上制作所述触控单元和所述触控单元走线;
第二步、在所述基板上制作所述颜色层,所述颜色层上具有所述一个或多个通孔;
第三步、在所述颜色层上制作所述电极,以及布置所述导体。
进一步地,所述导体的材料选自 碳浆、银浆和各向异性导电胶中 的任何一个或者为 碳浆、银浆和各向异性导电胶中任意两个或三个的混合物 。
进一步地,所述电极的材料选自银浆、碳浆中的任何一个或者为银浆和碳浆的混合物。
可选地, 所述电极为各向异性导电层 ;所述各向异性导电层 在垂直于所述第一表面的方向导电,在平行于所述基板的所述第一表面的方向不导电; 所述颜色层上具有开孔,所述电极至少部分地在所述开孔内,所述电极在所述开孔内的部分与所述触控单元走线接触;所述电极与所述基板的所述第一表面接触。
进一步地, 所述开孔是单孔开孔或多孔开孔。
进一步地,所述电极的颜色与所述颜色层的颜色相同。
进一步地,所述各向异性导电层为 ACP 胶层。
进一步地,提供了一种电容触摸屏的制作方法,用于制作所述的电容触摸屏,其特征在于,包括:
第一步、在所述基板上制作所述触控单元和所述触控单元走线;
第二步、在所述基板上制作所述颜色层,所述颜色层上具有所述开孔;
第三步、制作所述电极。
可选地,其中还包括第二颜色层, 所述电极部分地覆盖所述颜色层,所述第二颜色层部分地覆盖所述触控单元走线和所述电极,所述第二颜色层至少部分地覆盖所述颜色层;所述第二颜色层是绝缘的 。
进一步地,提供了一种电容触摸屏的制作方法,用于制作所述的电容触摸屏,其特征在于,包括:
第一步、在所述基板上制作所述触控单元和所述触控单元走线;
第二步、在所述基板上制作所述颜色层;
第三步、制作所述电极;
第四步、制作所述第二颜色层。
进一步地,所述第二颜色层选自颜色油墨涂层、光油涂层和颜色感光胶涂层中的任何一个。
进一步地,所述颜色层和所述第二颜色层的颜色相同。
进一步地,所述电极的材料选自银浆、碳浆中的任何一个或者为银浆和碳浆的混合物,所述电极与所述颜色层和所述第二颜色层的颜色相同。
可选地, 所述 颜色层上具有一个或多个通孔,所述导电体的一个端面与 所述触控单元走线相接,所述 导电体的另一个端面与 所述 一个或多个 通孔相接;所述电极在所述颜色层上延伸并通过所述 一个或多个 通孔与所述导电体接触。
进一步地,所述触控单元走线不接触所述一个或多个通孔的边缘;所述电极部分地分布在所述 一个或多个 通孔中,所述电极在所述 一个或多个 通孔中的部分与所述导电体接触,所述电极通过所述导电体与所述触控单元走线电连接。
进一步地,提供了一种电容触摸屏的制作方法,用于制作所述的电容触摸屏,其特征在于,包括:
第一步、在所述基板上制作所述触控单元和所述触控单元走线;
第二步、在所述触控单元走线上制作所述导电体;
第三步、在所述基板上制作所述颜色层,所述颜色层上具有所述一个或多个通孔;
第四步、制作所述电极,所述电极部分地分布在所述一个或多个通孔中,所述电极与所述导电体接触。
进一步地,所述导电体的材料选自碳浆、银浆和各向异性导电胶中的任何一个或者为碳浆、银浆和各向异性导电胶中任意两个或三个的混合物;所述电极的材料为银浆; 所述导电体的颜色与所述颜色层的颜色相同 。
进一步地,所述基板选自钢化玻璃基板、强化玻璃基板、普通玻璃基板和高分子材料透明基板中的任何一个。
进一步地,所述触控单元和所述触控单元走线由导电膜制备。
可选地, 所述导电膜为透明导电膜, 所述透明导电膜选自 ITO 膜、石墨烯层和碳纳米管层中的任何一个。
可选地, 所述导电膜 选自金属网格和纳米银线中的任何一个。
进一步地,还包括第二绝缘层,所述第二绝缘层覆盖在所述电极上。
进一步地,所述电极的用于与所述电容触摸屏的控制电路电连接的部分为所述电极的外接部分,所述电极的外接部分未被所述第二绝缘层覆盖。
在本发明的第一个较佳实施方式中 ,提供了一种单片式电容触摸屏及其制作方法,该电容触摸屏包括基板、多个触控单元、颜色层、多个电极和多个触控单元走线。其中,颜色层分布在电容触摸屏的边框区;多个触控单元形成触控单元的阵列;各个触控单元走线在基板的第一表面上从各个触控单元延伸;颜色层部分地覆盖各个触控单元走线,覆盖在第一表面的法线方向上与电极重合的触控单元走线的部分的颜色层上具有一个或多个通孔;通孔的两个端部分别与触控单元走线和电极相接;通孔内布置有导体,各个电极通过各个通孔内的导体与各个触控单元走线电连接。制作该电容触摸屏时,主要包括步骤:采用光刻、刻蚀的工艺或丝网印刷工艺在基板上制作触控单元和触控单元走线;采用丝网印刷工艺在基板上制作具有通孔的颜色层;以及采用丝网印刷工艺在通孔内填充导体及制作电极。
在本发明的第二个较佳实施方式中 ,提供了一种单片式电容触摸屏及其制作方法,该电容触摸屏包括基板、多个触控单元、颜色层、多个电极和多个触控单元走线。其中,颜色层分布在电容触摸屏的边框区;多个触控单元形成触控单元的阵列;各个触控单元走线在基板的第一表面上从各个触控单元延伸;颜色层上具有开孔,各个电极在颜色层的各个开孔内与各个触控单元走线电连接;电极的材料 为 ACP 胶层,其 在垂直于基板的第一表面的方向导电,在平行于基板的第一表面的方向不导电。 制作该电容触摸屏时,主要包括步骤:采用光刻、刻蚀的工艺或丝网印刷工艺在基板上制作触控单元和触控单元走线;采用丝网印刷工艺在基板上制作颜色层;以及采用丝网印刷工艺制作电极。
在本发明的第三个较佳实施方式中 ,提供了一种单片式电容触摸屏及其制作方法,该电容触摸屏包括基板、多个触控单元、颜色层、电极和多个触控单元走线。其中,颜色层分布在电容触摸屏的边框区;多个触控单元形成触控单元的阵列;各个触控单元走线在基板的第一表面上从各个触控单元延伸;颜色层上具有一个开孔,电极在颜色层的该开孔内与各个触控单元走线电连接;电极的材料 为 ACP 胶层,其 在垂直于基板的第一表面的方向导电,在平行于基板的第一表面的方向不导电。 制作该电容触摸屏时,主要包括步骤:采用光刻、刻蚀的工艺或丝网印刷工艺在基板上制作触控单元和触控单元走线;采用丝网印刷工艺在基板上制作颜色层;以及采用丝网印刷工艺制作电极。
在本发明的第四个较佳实施方式中 ,提供了一种单片式电容触摸屏及其制作方法,该电容触摸屏包括基板、多个触控单元、颜色层、第二颜色层、多个电极和多个触控单元走线。其中,颜色层和和第二颜色层分布在电容触摸屏的边框区;多个触控单元形成触控单元的阵列;各个触控单元走线在基板的第一表面上从各个触控单元延伸;触控单元走线部分地被颜色层覆盖;电极部分地覆盖颜色层,且与触控单元走线在触控单元走线未被颜色层覆盖的部分处电连接;第二颜色层部分地覆盖触控单元走线和电极,且覆盖颜色层并部分地露出各个电极。制作该电容触摸屏时,主要包括步骤:采用光刻、刻蚀的工艺或丝网印刷工艺在基板上制作触控单元和触控单元走线;采用丝网印刷工艺在基板上制作颜色层;采用丝网印刷工艺制作电极;采用丝网印刷工艺制作第二颜色层。
在本发明的第五个较佳实施方式中 ,提供了一种单片式电容触摸屏及其制作方法,该电容触摸屏包括基板、多个触控单元、颜色层、多个电极和多个触控单元走线。其中,颜色层分布在电容触摸屏的边框区;多个触控单元形成触控单元的阵列;多个触控单元走线在基板的第一表面上从各个触控单元延伸;颜色层部分地覆盖各个触控单元走线,覆盖触控单元走线的颜色层上具有一个或多个通孔;通孔的一个端部与触控单元走线相接;通孔内有导体, 导体还分布在通孔之外,本实施例中在通孔之外的导体部分地覆盖电极; 各个电极通过导体与各个触控单元走线电连接。制作该电容触摸屏时,主要包括步骤:采用光刻、刻蚀的工艺或丝网印刷工艺在基板上制作触控单元和触控单元走线;采用丝网印刷工艺在基板上制作具有通孔的颜色层;采用丝网印刷工艺在颜色层上制作电极,以及采用丝网印刷工艺在通孔内以及电极上布置导体。
在本发明的第六个较佳实施方式中 ,提供了一种 单片式电容触摸屏 及其制作方法,该 电容触摸屏 包括基板、多个触控单元、颜色层、多个电极、多个触控单元走线和多个导电体。其中,多个触控单元形成触控单元的阵列,各个触控单元走线在基板的第一表面上从各个触控单元延伸;颜色层分布在电容触摸屏的边框区,其上具有多个通孔; 各个触控单元走线延伸到各个通孔处并在通孔处被导电体覆盖;各个电极分布在颜色层上并具有在通孔中的部分, 各个电极和各个触控单元走线在各个通孔处通过各个导电体实现电连接。制作该电容触摸屏时,主要包括步骤:采用丝网印刷工艺在基板上制作触控单元和触控单元走线;采用丝网印刷工艺在触控单元走线上制作导电体;采用丝网印刷工艺制作具有通孔的颜色层;以及采用丝网印刷工艺在颜色层上制作电极。
由此可见,本发明的单片式电容触摸屏及其制作方法使触控单元走线被夹在基板和颜色层之间,将制作颜色层的工序设置在制作触控单元和触控单元走线的工序之后,这样,触控单元走线在基板上延伸而无需如现有技术那样跨过从基板到颜色层的台阶。由此避免了现有技术中解决触控单元走线跨过台阶和耐高温的油墨而采用的方案带来的增加工艺复杂性和难度的问题。另外,本发明的单片式电容触摸屏的覆盖触控单元走线的颜色层可以对触控单元走线起到保护的作用,以提高本发明的单片式电容触摸屏的可靠性。本发明将制作颜色层的工序设置在制作触控单元和触控单元走线的工序之后,降低了后续工艺中的温度对颜色层的影响,使颜色层不易于变色并且不改变其绝缘性能,避免了传统制程中的镀膜难题。并且,本发明的单片式电容触摸屏结构简单、可靠,成本低廉;本发明的单片式电容触摸屏的制作方法工序少,简单、易于操作。
以下将结合附图对本发明的构思、具体结构及产生的技术效果作进一步说明,以充分地了解本发明的目的、特征和效果。
附图说明
图 1 是现有技术的单片式电容触摸屏的正视示意图。
图 2 是图 1 所示的电容触摸屏在 AA' 方向的剖面示意图。
图 3 是在第一个实施例中,本发明的单片式电容触摸屏的正视示意图,其中触控单元走线被颜色层覆盖的部分用虚线表示。
图 4 是图 3 所示的电容触摸屏在 A1A1' 方向的剖面示意图。
图 5 是在第二个实施例中,本发明的单片式电容触摸屏的正视示意图,其中触控单元走线被颜色层覆盖的部分用虚线表示。
图 6 是图 5 所示的电容触摸屏在 A2A2' 方向的剖面示意图。
图 7 是在第三个实施例中,本发明的单片式电容触摸屏的正视示意图,其中触控单元走线被颜色层覆盖的部分用虚线表示。
图 8 是图 7 所示的电容触摸屏在 A3A3' 方向的剖面示意图。
图 9 是在第四个实施例中,本发明的单片式电容触摸屏的正视示意图,其中电极被第二颜色层覆盖的部分用虚线表示。
图 10 是图 9 所示的电容触摸屏在 A4A4' 方向的剖面示意图。
图 11 显示了在触控单元走线和电极的连接部分,图 9 所示的电容触摸屏上的电极、触控单元走线和颜色层的分布,其中触控单元走线被颜色层覆盖的部分用虚线表示。
图 12 是在第五个实施例中,本发明的单片式电容触摸屏在触控单元走线和电极的连接部分的正视示意图。
图 13 是图 12 所示的电容触摸屏在 BB' 方向的剖面示意图。
图 14 是在第六个实施例中,本发明的单片式电容触摸屏在触控单元走线和电极的连接部分的正视示意图,其中导电体和触控单元走线被颜色层和电极覆盖的部分用虚线表示。
图 15 是图 14 所示的电容触摸屏在 B1B1' 方向的剖面示意图。
具体实施方式
如图 3 和 4 所示,在第一个较佳的实施例中,本发明的单片式电容触摸屏包括基板 101 、如触控单元 102 的多个触控单元、颜色层 103 、如电极 140 、 141 的多个电极和多个触控单元走线。其中,触控单元由驱动部分和感应部分构成,如触控单元 102 由驱动部分和感应部分构成;颜色层 103 是绝缘层,分布在电容触摸屏的边框区;多个触控单元形成触控单元的阵列,分布在基板 101 的第一表面上且在电容触摸屏的可操作区域内;多个触控单元走线在基板 101 的第一表面上从各个触控单元延伸到边框区,例如,触控单元走线 120 从触控单元 102 的驱动部分延伸,触控单元走线 121 从触控单元 102 的感应部分延伸;颜色层 103 、电极和触控单元走线在从基板 101 的第一表面起沿第一表面的法线方向上的分布次序为触控单元走线、颜色层 103 和电极,例如如图 4 显示的,颜色层 103 、电极 141 和触控单元走线 121 在从基板 101 的第一表面起沿第一表面的法线方向上的分布次序为触控单元走线 121 、颜色层 103 和电极 141 ,在图 3 中基板 101 的第一表面的法线方向为垂直于纸面向外,在图 4 中基板 101 的第一表面的法线方向为向上;颜色层 103 部分地覆盖各个触控单元走线(此处的'覆盖'是以第一表面的法线方向为判断依据的,即以第一表面的法线方向为向上时,上方的层覆盖下方的层,以上关于'覆盖'的描述也适用于本说明书的其它部分),具体地,触控单元走线在可视区域内的部分未被颜色层 103 覆盖,另外,在第一表面的法线方向上与电极重合的触控单元走线的部分也部分地被颜色层 103 覆盖;本实施例中,覆盖在第一表面的法线方向上与电极重合的触控单元走线的颜色层 103 部分上具有一个或多个通孔,即在第一表面的法线方向上,颜色层 103 被夹在电极和触控单元走线之间的部分具有一个或多个通孔,如图 4 所显示的,颜色层 103 被夹在电极 141 和触控单元走线 121 之间的部分具有一个通孔 161 ;通孔被夹在触控单元走线和电极之间,较佳地,其两个端部分别与触控单元走线和电极相接,如图 4 所显示的,通孔 161 的一个端部(下端部)与触控单元走线 121 相接,通孔 161 的另一个端部(上端部)与电极 141 相接;通孔内有导体,其与触控单元走线和电极皆相接触,各个电极通过各个通孔内的导体与各个触控单元走线电连接,如图 6 显示的通孔 161 内具有导体 171 ,导体 171 与触控单元走线 121 和电极 141 皆相接触,电极 141 通过通孔 161 内的导体 171 与触控单元走线 121 电连接。需要说明的是,由于受到向通孔中填入导体的工艺的影响(例如,丝网印刷时的对准偏差等),可能会有部分的导体分布在通孔外,而此时通孔的上端部可能并不与电极相接。在第一表面的法线方向上,颜色层 103 被夹在电极和触控单元走线之间的部分具有多个通孔的情况,例如颜色层 103 被夹在电极 141 和触控单元走线 121 之间的部分具有多个通孔的情况,是与上述一个通孔的情况相似的,这些通孔的下端部皆与该触控单元走线相接,它们中的一个或多个内有导体,导体与该触控单元走线相接,该电极与至少一个通孔内的导体相接以与该触控单元走线电连接。
本实施例中,导体的材料可以选用碳浆、银浆或碳浆和银浆的混合物,其颜色与颜色层 103 的颜色相同(此处的颜色相同是指两者的色差在较小色差的程度之下,例如使用 CIE1976 ( L*a*b* )色空间的色差计算公式或色差仪计算或测量得到两者的色差值 ΔE 不大于 6 ,较佳地不大于 3 ,该描述也适用于本文的其他部分);颜色层 103 可以是颜色油墨涂层、光油涂层或感光胶涂层,即颜色层 103 的材料可以选用颜色油墨、光油或感光胶;基板 101 可以选用钢化玻璃基板、强化玻璃基板或普通玻璃基板,也可以选用高分子材料透明基板;触控单元和触控单元走线由导电膜制备,导电膜可以是 ITO 膜、石墨烯层、碳纳米管层、纳米银线、金属网格( metal mesh )或其它的导电材料层,即导电膜的材料可以选用 ITO 、石墨烯、碳纳米管、纳米银线、金属网格或其它的导电材料;电极的材料可以选用银浆、碳浆中的任何一个或者为银浆和碳浆的混合物,具体地,当电极较短时可以选用银浆、碳浆或银浆和碳浆的混合物,当电极较长时较佳地选用银浆,其中电极较短是指电极与触控单元走线的连接处到电极与电容触摸屏的控制电路的连接处之间的电极的长度不大于 5mm ,电极较长是指该长度大于 5mm 。
制作本实施中的电容触摸屏的具体步骤如下:
第一步、在基板 101 上制作触控单元和触控单元走线。
本实施例中以采用单层透明导电膜的制作工艺为例进行说明,其使用同一层透明导电膜形成触控单元和触控单元走线。
具体地,在本步骤中,首先取用一片玻璃基板作为基板 101 ,其可以选用钢化玻璃基板、强化玻璃基板或普通玻璃基板,也可以选用高分子材料透明基板作为基板 101 ;然后,对基板 101 进行清洗,选定完成清洗的基板 101 的一个表面作为第一表面;然后,在基板 101 的第一表面上沉积一层透明导电膜,本实施例中沉积的为 ITO 膜,该 ITO 膜的厚度为 15~40nm ,或者为 5~15nm ,或者为 40~60nm ;然后,在导电膜上涂光刻胶,进行光刻以形成触控单元和触控单元走线的图案,本实施例中采用黄光光刻工艺;最后,刻蚀触控单元和触控单元走线的图案,去除光刻胶,在基板 101 的第一表面形成触控单元和触控单元走线。另外,还可以采用丝网印刷工艺直接在基板 101 的第一表面上形成触控单元和触控单元走线的图案的导电膜,由此在基板 101 的第一表面形成触控单元和触控单元走线。
第二步、在基板 101 上制作颜色层 103 。
具体地,采用丝网印刷工艺在基板 101 的第一表面上形成图案为电容触摸屏的边框区的颜色层 103 ,其上具有通孔;通孔沿第一表面的法线方向延伸,其一个端部与触控单元走线相接,其另一个端部用于与电极相接。如图 4 所示的被夹在电极 141 和触控单元走线 121 之间的颜色层 103 的部分具有一个通孔 161 。本实施例中,采用颜色油墨形成颜色层 103 ,颜色层 103 的厚度为 1~40μm ,通孔的直径为 0.1~0.6mm 。另外,形成的通孔的横截面(即平行于第一表面的截面)不限于圆形,还可以是矩形、椭圆形等的形状。
第三步、在通孔内布置导体,以及继而制作电极。
具体地,采用丝网印刷工艺在上一步形成的各个通孔内填充制备导体的材料,本实施例中,选用碳浆作为导体的材料,其颜色与颜色层 103 的颜色相同;填入的导体的高度为 1~100μm ,优选地与颜色层 103 的厚度相等。继而,采用丝网印刷工艺在颜色层 103 的表面形成各个电极。本实施例中,选用银浆作为电极的材料,电极的厚度为 5~40μm 。另外,还可以采用激光蚀刻的方法形成电极,具体地为:在颜色层 103 的表面形成需要的电极厚度的银浆层,使用激光蚀刻银浆层,在颜色层 103 的表面形成各个电极。
需要说明的是,在填充入通孔的导体的材料和电极的材料相同的情况下,还可以使用一次丝网印刷工艺或者结合使用丝网印刷和激光工艺,使制备导体的材料填充入通孔且形成电极,电极的材料的颜色优选地与颜色层 103 的颜色相同。这种方法尤为适合通孔较小的情况,例如通孔的直径(或多边形的通孔的边长,或椭圆的通孔的长轴)不大于 0.1mm 。
在小通孔的情况下,例如通孔的直径(或多边形的通孔的边长,或椭圆的通孔的长轴)不大于 0.2mm 的情况下,其中填入的导体(或电极)与颜色层 103 之间的色差值 ΔE 较佳地不大于 6 ;通孔的直径不大于 0.05mm 的情况下,两者之间的色差值 ΔE 较佳地不大于 10 ,甚至两者的颜色可以完全不同。而当通孔的直径(或多边形的通孔的边长,或椭圆的通孔的长轴)大于 0.2mm 时,其中填入的导体(或电极)与颜色层 103 之间的色差值 ΔE 较佳地不大于 3 。
最后,为了防止电极暴露在空气中被氧化,还可以在电极上覆盖一层绝缘层,这层绝缘层覆盖在除了电极的外接部分的整个电极上,其由颜色油墨、光油或颜色感光胶中的一个或多个形成,其图案可以是电容触摸屏的边框区或者仅覆盖电极。
如图 5 和 6 所示,在第二个较佳的实施例中,本发明的单片式电容触摸屏包括基板 201 、如触控单元 202 的多个触控单元、颜色层 203 、如电极 240 、 241 的多个电极和多个触控单元走线。其中,触控单元由驱动部分和感应部分构成,如触控单元 202 由驱动部分和感应部分构成;多个触控单元形成触控单元的阵列,分布在基板 201 的第一表面上且在电容触摸屏的可操作区域内;多个触控单元走线在基板 201 的第一表面上从各个触控单元延伸,例如,触控单元走线 220 从触控单元 202 的驱动部分延伸,触控单元走线 221 从触控单元 202 的感应部分延伸;颜色层 203 部分地覆盖各个触控单元走线,具体地,触控单元走线在可视区域内的部分未被颜色层 203 覆盖,另外,触控单元走线在第一表面的法线方向上与电极重合的部分也未被颜色层 203 覆盖,在图 5 中基板 201 的第一表面的法线方向为垂直于纸面向外,在图 6 中基板 201 的第一表面的法线方向为向上;本实施例中,颜色层 203 是绝缘层,分布在电容触摸屏的边框区,其上具有开孔,开孔的下边缘与一个触控单元走线接触,如图 6 所示的开孔 261 ,其下边缘与触控单元走线 221 接触;各个电极分布在电容触摸屏的边框区且至少部分地在对应的开孔内以与相应的触控单元走线接触,实现与相应的触控单元走线的电连接,如图 5 和 6 所示的电极 241 ,其部分地在开孔 261 内,与触控单元走线 221 接触及电连接。图 6 中示出的是一个开孔对应一个触控单元走线和一个电极的情况,该开孔是一个通孔,其下边缘与该触控单元走线接触,该电极至少部分地分布在该开孔内以与该触控单元走线接触;需要说明的是,该开孔还可以由多个并列但彼此不相接的通孔组成,这些通孔的下边缘皆与该触控单元走线接触,该电极至少部分地分布在这些通孔中的一个或多个内以与该触控单元走线接触。以下将前一种情况的开孔称作单孔开孔,将后一种情况的多个开孔称作多孔开孔。
本实施例中,电极的材料 为 ACP 胶层,也可以是其它的各向异性导电层,其 在垂直于基板 201 的第一表面的方向导电,在平行于基板 201 的第一表面的方向不导电,其 颜色与颜色层 203 的颜色相同 ; 颜色层 203 可以是颜色油墨涂层、光油涂层或感光胶涂层,即颜色层 203 的材料可以选用颜色油墨、光油或感光胶;基板 201 可以选用钢化玻璃基板、强化玻璃基板或普通玻璃基板,也可以选用高分子材料透明基板;触控单元和触控单元走线由导电膜制备,导电膜可以是 ITO 膜、石墨烯层、碳纳米管层、纳米银线、金属网格( metal mesh )或其它的导电材料层,即导电膜的材料可以选用 ITO 、石墨烯、碳纳米管、纳米银线、金属网格或其它的导电材料。需要说明的是,本实施例中的电极较短,在通过焊接、打线、热压等连接方式使电极连接电容触摸屏的控制电路时,需要注意焊接、打线或热压的位置以保证控制电路通过电极与相应的触控单元之间的电连接,例如焊接、打线或热压的位置应当位于与相应的触控单元走线在第一表面的法线方向上重合的电极部分。
制作本实施中的电容触摸屏的具体步骤如下:
第一步、在基板 201 上制作触控单元和触控单元走线。
本实施例中以采用单层透明导电膜的制作工艺为例进行说明,其使用同一层透明导电膜形成触控单元和触控单元走线。
具体地,在本步骤中,首先取用一片玻璃基板作为基板 201 ,其可以选用钢化玻璃基板、强化玻璃基板或普通玻璃基板,也可以选用高分子材料透明基板作为基板 201 ;然后,对基板 201 进行清洗,选定完成清洗的基板 201 的一个表面作为第一表面;然后,在基板 201 的第一表面上沉积一层透明导电膜,本实施例中沉积的为 ITO 膜,该 ITO 膜的厚度为 15~40nm ,或者 5~15nm ,或者为 40~60nm ;然后,在导电膜上涂光刻胶,进行光刻以形成触控单元和触控单元走线的图案,本实施例中采用黄光光刻工艺;最后,刻蚀触控单元和触控单元走线的图案,去除光刻胶,在基板 201 的第一表面形成触控单元和触控单元走线。另外,还可以采用丝网印刷工艺直接在基板 201 的第一表面上形成触控单元和触控单元走线的图案的透明导电膜,由此在基板 201 的第一表面形成触控单元和触控单元走线。
第二步、在基板 201 上制作颜色层 203 。
具体地,采用丝网印刷工艺在基板 201 的第一表面上形成图案为电容触摸屏的边框区的颜色层 203 ,其上具有开孔,开孔可以是单孔开孔,也可以是多孔开孔;开孔用于容纳至少部分的电极,如图 6 所示的颜色层 203 具有一个开孔 261 ,用于容纳电极 241 。本实施例中,采用颜色油墨形成颜色层 203 ,颜色层 203 的厚度为 5~40μm ,开孔的长度和宽度分别与其容纳的电极的长度和宽度相等或略大(例如,不大于电极的长度和宽度的 30% )以适合地容纳电极,开孔的高度可以大于或小于或等于电极的高度,例如开孔 261 容纳电极 241 。在其他实施例中,开孔也可以容纳电极的一部分。另外,形成的开孔的横截面(即平行于第一表面的截面)不限于矩形,还可以是圆形、椭圆形等的形状。
第三步、制作电极。
具体地,采用丝网印刷工艺形成各个电极,各个电极至少部分地分布在对应的各个开孔内。本实施例中,采用 ACP 胶,其形成的电极 在垂直于基板 201 的第一表面的方向导电,在平行于基板 201 的第一表面的方向不导电, 电极的厚度为 5~40μm ,横截面(即平行于第一表面的截面)为矩形。另外,电极的横截面不限于矩形,还可以是圆形、椭圆形等的形状。
开孔内的电极的颜色与颜色层 203 的颜色相同。需要说明的是,当开孔为多孔开孔时,在组成该多孔开孔的通孔较小的情况下,例如各个通孔的直径(或多边形的通孔的边长,或椭圆的通孔的长轴)不大于 0.2mm 的情况下,其中的电极与颜色层 203 之间的色差值 ΔE 较佳地不大于 6 ;通孔的直径(或多边形的通孔的边长,或椭圆的通孔的长轴)不大于 0.05mm 的情况下,两者之间的色差值 ΔE 较佳地不大于 10 ,甚至两者的颜色可以完全不同。而当通孔的直径(或多边形的通孔的边长,或椭圆的通孔的长轴)大于 0.2mm 时,其中的电极与颜色层 203 之间的色差值 ΔE 较佳地不大于 3 。
最后,为了防止电极暴露在空气中被氧化,还可以在电极上覆盖一层绝缘层,这层绝缘层覆盖在除了电极的外接部分的整个电极上,其由颜色油墨、光油或颜色感光胶中的一个或多个形成,其图案可以是电容触摸屏的边框区或者仅覆盖电极。
如图 7 和 8 所示,在第三个较佳的实施例中,本发明的单片式电容触摸屏包括基板 301 、如触控单元 302 的多个触控单元、颜色层 303 、电极 340 和多个触控单元走线。其中,触控单元由驱动部分和感应部分构成,如触控单元 202 由驱动部分和感应部分构成;多个触控单元形成触控单元的阵列,分布在基板 301 的第一表面上且在电容触摸屏的可操作区域内;多个触控单元走线在基板 301 的第一表面上从各个触控单元延伸,例如,触控单元走线 320 从触控单元 302 的驱动部分延伸,触控单元走线 321 从触控单元 302 的感应部分延伸;颜色层 303 部分地覆盖各个触控单元走线,具体地,触控单元走线在可视区域内的部分未被颜色层 303 覆盖,另外,触控单元走线在第一表面的法线方向上与电极重合的部分也未被颜色层 303 覆盖,在图 7 中基板 301 的第一表面的法线方向为垂直于纸面向外,在图 8 中基板 301 的第一表面的法线方向为向上;本实施例中,颜色层 303 是绝缘层,分布在电容触摸屏的边框区,其上具有一个开孔,开孔的下边缘与各个触控单元走线皆接触,较佳地,各个触控单元走线皆有暴露在该开孔内的部分(即以第一表面的法线方向相反的方向看开孔内部,可以看到各个触控单元走线的一部分),如图 8 所示的开孔 360 ,各个触控单元走线皆有暴露在开孔 360 内的部分;电极分布在电容触摸屏的边框区且至少部分地在开孔 360 内以与各个触控单元走线接触,实现与各个触控单元走线的电连接,如图 8 所示的电极 340 ,其部分地在开孔 360 内,与诸如触控单元走线 321 、 331 的各个触控单元走线接触及电连接。图 8 中示出的开孔是一个单孔开孔,其对应多个触控单元走线和一个电极,该开孔的下边缘与各个触控单元走线接触,该电极至少部分地分布在该开孔内以与各个触控单元走线接触;该开孔还可以是多孔开孔,电极至少部分地分布在组成该多孔开孔的通孔中以与各个触控单元走线接触,具体地,每个触控单元走线对应着组成该多孔开孔的多个通孔的一部分,电极分布在这部分通孔中的部分与该触控单元走线接触。
本实施例中,电极的材料 为 ACP 胶层,也可以是其它的各向异性导电层,其 在垂直于基板 301 的第一表面的方向导电,在平行于基板 301 的第一表面的方向不导电,其 颜色与颜色层 303 的颜色相同 ; 颜色层 303 可以是颜色油墨涂层、光油涂层或感光胶涂层,即颜色层 303 的材料可以选用颜色油墨、光油或感光胶;基板 301 可以选用钢化玻璃基板、强化玻璃基板或普通玻璃基板,也可以选用高分子材料透明基板;触控单元和触控单元走线由导电膜制备,导电膜可以是 ITO 膜、石墨烯层、碳纳米管层、纳米银线、金属网格( metal mesh )或其它的导电材料层,即导电膜的材料可以选用 ITO 、石墨烯、碳纳米管、纳米银线、金属网格或其它的导电材料。需要说明的是,本实施例中的电极较短,在通过焊接、打线、热压等方式连接电容触摸屏的控制电路时,需要注意焊接、打线或热压的位置以保证电容触摸屏的控制电路通过电极与相应的触控单元之间的电连接,例如焊接、打线或热压的位置应当位于与相应的触控单元走线在第一表面的法线方向上重合的电极部分。
制作本实施中的电容触摸屏的具体步骤如下:
第一步、在基板 301 上制作触控单元和触控单元走线。
本实施例中以采用单层透明导电膜的制作工艺为例进行说明,其使用同一层透明导电膜形成触控单元和触控单元走线。
具体地,在本步骤中,首先取用一片玻璃基板作为基板 301 ,其可以选用钢化玻璃基板、强化玻璃基板或普通玻璃基板,也可以选用高分子材料透明基板作为基板 301 ;然后,对基板 301 进行清洗,选定完成清洗的基板 301 的一个表面作为第一表面;然后,在基板 301 的第一表面上沉积一层透明导电膜,本实施例中沉积的为 ITO 膜,该 ITO 膜的厚度为 15~40nm ,或者 5~15nm ,或者为 40~60nm ;然后,在导电膜上涂光刻胶,进行光刻以形成触控单元和触控单元走线的图案,本实施例中采用黄光光刻工艺;最后,刻蚀触控单元和触控单元走线的图案,去除光刻胶,在基板 301 的第一表面形成触控单元和触控单元走线。另外,还可以采用丝网印刷工艺直接在基板 301 的第一表面上形成触控单元和触控单元走线的图案的透明导电膜,由此在基板 301 的第一表面形成触控单元和触控单元走线。
第二步、在基板 301 上制作颜色层 303 。
具体地,采用丝网印刷工艺在基板 301 的第一表面上形成图案为电容触摸屏的边框区的颜色层 303 ,其上具有一个开孔,该开孔可以是单孔开孔,也可以是多孔开孔;开孔用于容纳至少部分的电极,如图 8 所示的颜色层 303 具有一个开孔 360 ,用于容纳电极 340 。本实施例中,采用颜色油墨形成颜色层 303 ,颜色层 303 的厚度为 5~40μm ,开孔 360 的长度和宽度分别与其容纳的电极的长度和宽度相等或略大(例如,不大于电极的长度和宽度的 30% )以适合地容纳电极,开孔的高度可以大于或小于或等于电极的高度,例如开孔 360 容纳电极 340 。在其他实施例中,开孔也可以容纳电极的一部分。另外,形成的开孔的横截面(即平行于第一表面的截面)不限于矩形,还可以是圆形、椭圆形等的形状。
第三步、制作电极。
具体地,采用丝网印刷工艺形成电极,电极至少部分地分布在开孔内。本实施例中,采用 ACP 胶,其形成的电极 在垂直于基板 301 的第一表面的方向导电,在平行于基板 301 的第一表面的方向不导电, 电极的厚度为 5~40μm ,横截面(即平行于第一表面的截面)为矩形。另外,电极的横截面不限于矩形,还可以是圆形、椭圆形等的形状。
开孔内的电极的颜色与颜色层 303 的颜色相同。需要说明的是,当开孔为多孔开孔时,在组成该多孔开孔的通孔较小的情况下,例如各个通孔的直径(或多边形的通孔的边长,或椭圆的通孔的长轴)不大于 0.2mm 的情况下,其中的电极与颜色层 303 之间的色差值 ΔE 较佳地不大于 6 ;通孔的直径(或多边形的通孔的边长,或椭圆的通孔的长轴)不大于 0.05mm 的情况下,两者之间的色差值 ΔE 较佳地不大于 10 ,甚至两者的颜色可以完全不同。而当通孔的直径(或多边形的通孔的边长,或椭圆的通孔的长轴)大于 0.2mm 时,其中的电极与颜色层 303 之间的色差值 ΔE 较佳地不大于 3 。
最后,为了防止电极暴露在空气中被氧化,还可以在电极上覆盖一层绝缘层,这层绝缘层覆盖在除了电极的外接部分的整个电极上,其由颜色油墨、光油或颜色感光胶中的一个或多个形成,其图案可以是电容触摸屏的边框区或者仅覆盖电极。
如图 9-11 所示,在第四个较佳的实施例中,本发明的单片式电容触摸屏包括基板 401 、如触控单元 402 的多个触控单元、包括颜色层 413 、第二颜色层 423 、如电极 440 和 441 的多个电极和多个触控单元走线。其中,颜色层 413 和第二颜色层 423 是绝缘层,分布在电容触摸屏的边框区;触控单元由驱动部分和感应部分构成,如触控单元 402 由驱动部分和感应部分构成;多个触控单元形成触控单元的阵列,分布在基板 401 的第一表面上且在电容触摸屏的可操作区域内;多个触控单元走线在基板 401 的第一表面上从各个触控单元延伸到边框区,例如,触控单元走线 420 从触控单元 402 的驱动部分延伸,触控单元走线 421 从触控单元 402 的感应部分延伸;颜色层 413 部分地覆盖各个触控单元走线,具体地,触控单元走线在可视区域内的部分未被颜色层 413 覆盖;另外,触控单元走线的端部也可以部分地被颜色层 413 覆盖,如图 10 和 11 所示,各个触控单元走线在第一表面的法线方向上与电极重合的部分是部分地被颜色层 413 覆盖的;在图 9 和 11 中基板 401 的第一表面的法线方向为垂直于纸面向外,在图 10 中基板 401 的第一表面的法线方向为向上;电极部分地覆盖颜色层 413 ,且与触控单元走线在触控单元走线未被颜色层 413 覆盖的部分处电连接;第二颜色层 423 部分地覆盖触控单元走线、电极和颜色层 413 并使各个电极的用于连接电容触摸屏的控制电路的部分露出(本实施例中,如图 9 所示,还露出了各个电极与触控单元走线电连接的部分,但在本发明的其他实施例中这些部分是可以不暴露的)。本实施例中,如图 9 所显示的,在第一表面的法线方向上与电极 441 重合的触控单元走线 421 部分地被颜色层 413 覆盖;电极 441 部分地覆盖颜色层 413 ,且与触控单元走线 421 在触控单元走线 421 未被颜色层 413 覆盖的部分处接触及电连接;第二颜色层 423 部分地覆盖触控单元走线 421 、电极 441 和颜色层 413 并使电极 441 部分地露出。
本实施例中,颜色层 413 和第二颜色层 423 可以是颜色油墨涂层、光油涂层或感光胶涂层,即颜色层 413 和第二颜色层 423 的材料可以选用颜色油墨、光油或感光胶,颜色层 413 和第二颜色层 423 的颜色相同;电极的材料可以选用银浆、碳浆中的任何一个或者为银浆和碳浆的混合物,具体地,当电极较短时可以选用银浆、碳浆或银浆和碳浆的混合物,当电极较长时较佳地选用银浆,电极的颜色与颜色层 413 和第二颜色层 423 的颜色相同;基板 401 可以选用钢化玻璃基板、强化玻璃基板或普通玻璃基板,也可以选用高分子材料透明基板;触控单元和触控单元走线由导电膜制备,导电膜可以是 ITO 膜、石墨烯层、碳纳米管层、纳米银线、金属网格( metal mesh )或其它的导电材料层,即导电膜的材料可以选用 ITO 、石墨烯、碳纳米管、纳米银线、金属网格或其它的导电材料。
制作本实施中的电容触摸屏的具体步骤如下:
第一步、在基板 401 上制作触控单元和触控单元走线。
本实施例中以采用单层透明导电膜的制作工艺为例进行说明,其使用同一层透明导电膜形成触控单元和触控单元走线。
具体地,在本步骤中,首先取用一片玻璃基板作为基板 401 ,其可以选用钢化玻璃基板、强化玻璃基板或普通玻璃基板,也可以选用高分子材料透明基板作为基板 401 ;然后,对基板 401 进行清洗,选定完成清洗的基板 401 的一个表面作为第一表面;然后,在基板 401 的第一表面上沉积一层透明导电膜,本实施例中沉积的为 ITO 膜,该 ITO 膜的厚度为 15~40nm ,或者为 5~15nm ,或者为 40~60nm ;然后,在导电膜上涂光刻胶,进行光刻以形成触控单元和触控单元走线的图案,本实施例中采用黄光光刻工艺;最后,刻蚀触控单元和触控单元走线的图案,去除光刻胶,在基板 401 的第一表面形成触控单元和触控单元走线。另外,还可以采用丝网印刷工艺直接在基板 401 的第一表面上形成触控单元和触控单元走线的图案的透明导电膜,由此在基板 401 的第一表面形成触控单元和走线。
第二步、在基板 401 上制作颜色层 413 。
具体地,采用丝网印刷工艺在基板 401 的第一表面上形成颜色层 413 ,其部分地覆盖各个触控单元走线。本实施例中,采用颜色油墨形成颜色层 413 ,颜色层 413 的厚度为 5~40μm ;如图 11 所示,其在触控单元走线和电极的连接处呈阶梯形,用于使电极仅和设计为与其电连接的触控单元走线接触,在其它实施例中颜色层 413 也可以是其它的形状,只要其能使电极仅和设计为与其电连接的触控单元走线接触。
第三步、制作电极。
具体地,采用丝网印刷工艺在基板 401 的第一表面、触控单元走线以及颜色层 413 上形成电极。本实施例中,采用银浆,其颜色与颜色层 413 和第二颜色层 423 的颜色相同,电极的厚度为 5~40μm 。另外,还可以采用激光蚀刻的方法形成电极,具体地为:在基板 401 的第一表面、触控单元走线以及颜色层 413 的上形成需要的电极厚度的银浆层,使用激光蚀刻银浆层,形成各个电极。
第四步、制作第二颜色层 423 。
具体地,采用丝网印刷工艺在基板 401 的第一表面、触控单元走线、电极以及颜色层 413 上形成图案为电容触摸屏的边框区的第二颜色层 423 ,其上具有开孔;第二颜色层 423 部分地覆盖基板 401 的第一表面、各个触控单元走线和电极,其至少部分地覆盖颜色层 413 。本实施例中,采用颜色油墨形成第二颜色层 423 ,第二颜色层 423 的厚度为 5~40μm (需要说明的是,图 10 为示意图,实际使用时,第二颜色层 423 的厚度可能比电极的厚度小);第二颜色层 423 上的开孔用以露出各个电极的用于连接电容触摸屏的控制电路的部分和各个电极与触控单元走线电连接的部分。在本发明的其它实施例中,第二颜色层 423 也可以是其它的形状,只要其与之前制作的颜色层 413 的组合层的图案为电容触摸屏的边框区,并且该组合层上具有开孔以露出各个电极的用于连接电容触摸屏的控制电路的部分。较佳地,第二颜色层 423 覆盖在除了电极的外接部分的整个电极上,其可以用于防止电极暴露在空气中被氧化。
另外,当电极的外接部分之外的电极存在未被第二颜色层 423 覆盖的部分时,还可以在该部分上覆盖一层绝缘层,以防止该部分暴露在空气中被氧化。这层绝缘层由颜色油墨、光油或颜色感光胶中的一个或多个形成,其图案可以是电容触摸屏的边框区或者仅覆盖电极或仅覆盖上述的电极未被第二颜色层 423 覆盖的部分。
另外,本实施例中,颜色层 413 和第二颜色层 423 是可以彼此替换的,即将第二颜色层 523 作为颜色层而将颜色层 513 作为第二颜色层,并不影响本发明的实施。
第五个较佳的实施例与第一个较佳的实施例类似,其中的本发明的单片式电容触摸屏包括基板 501 、多个触控单元、颜色层 503 、如通孔 561 的多个通孔、如电极 541 的多个电极和如触控单元走线 521 的多个走线,颜色层 503 是绝缘层,分布在电容触摸屏的边框区,通孔内具有导体,导体与触控单元走线相接,如通孔 561 内具有导体 571 ,导体 571 与触控单元走线 521 相接。与第一个较佳的实施例不同地,本实施例中的导体还分布在通孔之外,分布在通孔外的导体和电极相接触,由此各个电极通过导体与各个走线电连接。如图 12 和 13 所示,导体 571 还分布在通孔 561 外,分布在通孔 561 外的导体 571 覆盖电极 541 ,电极 541 通过导体 571 与触控单元走线 521 电连接。以上描述了一个触控单元走线对应着一个通孔且与该通孔的下端部相接的情况,与第一个较佳的实施例相同地,这个触控单元走线还可以对应多个通孔,该触控单元走线与这些通孔的下端部皆相接,这些通孔中的一个或多个内有导体,导体与该触控单元走线相接,对应的电极与至少一个通孔内的导体相接以与该触控单元走线电连接。
本实施例中,制备本发明的单片式电容触摸屏各组成部分的材料与第一个实施例相同,在此不赘述。制作本实施中的电容触摸屏的具体步骤包括:
第一步、在基板 501 上制作触控单元和触控单元走线;
第二步、在基板 501 上制作颜色层 503 ;
第三步、在颜色层 503 上制作电极,以及在通孔内和电极上布置导体。
以上步骤中的第一、二步与第一个实施例相同,在此不赘述,以下仅对第三步进行描述。
在第三步中,具体地,采用丝网印刷工艺在颜色层 103 的表面形成各个电极。本实施例中,选用银浆作为电极的材料,电极的厚度为 5~40μm ;继而采用丝网印刷工艺在第二步中形成的各个通孔内填充制备导体的材料,本实施例中,选用银浆作为导体的材料,其颜色与颜色层 503 的颜色相同;填入的导体的高度超过颜色层的高度,优选地为 1~45μm ;导体覆盖在电极上,优选地覆盖在电极上的导体的厚度为 1~15μm 。
需要说明的是,本实施例示出的是分布在通孔之外的导体部分覆盖在电极上的情况,但在其他的实施例中还可以是电极覆盖在该导体部分之上或者电极与该导体部分相邻接,只要保证两者相接触即可。使用者可以相应地调整上述第三步内的操作步骤来实现,先制作电极后布置导体或者先布置导体后制作电极都是可行的。
如图 14 和 15 所示,在第六个较佳的实施例中,本发明的单片式电容触摸屏包括基板 601 、多个触控单元、颜色层 603 、如电极 641 的多个电极、如触控单元走线 621 的多个触控单元走线以及如导电体 671 的多个导电体。其中,基板 601 、触控单元、电极和触控单元走线的结构、图案和分布情况与第一个实施例相同,在此不赘述。颜色层 603 是绝缘层,分布在电容触摸屏的边框区,其上具有通孔,如通孔 661 ;在基板 601 上,多个触控单元走线从各个触控单元的驱动部分和感应部分延伸到颜色层 603 上的各个通孔处,例如,触控单元走线 621 延伸到通孔 661 处;各个触控单元走线在各个通孔处被导电体覆盖,导电体的一个端面与 触控单元走线相接, 导电体的另一个端面与 通孔相接,具体地, 导电体的另一个端面与 通孔的下端部相接, 导电体使触控单元走线不接触通孔的边缘,例如,触控单元走线 621 被导电体 671 覆盖,导电体 671 使触控单元走线 621 不接触通孔 661 的边缘;各个电极 皆具有一部分在对应的通孔中, 并与各个导电体相接,例如,电极 641 具有一部分在通孔 661 中,并与导电体 661 相接。以上描述了覆盖一个触控单元走线的导电体对应着一个通孔且与该通孔的下端部相接的情况,与之前的实施例相同地,这个导电体还可以对应多个通孔,该导电体与这些通孔的下端部皆相接,对应的电极进入至少一个通孔内以与该导电体接触,从而与该触控单元走线电连接。
本实施例中的基板 601 、触控单元、颜色层、电极和触控单元走线的材料和第一个实施例相同,在此不赘述,导电体的材料可以选用碳浆、银浆或 各向异性导电胶( Anisotropic Conductive Pastes , ACP 或者 Anisotropic Conductive Films , ACF )或者为碳浆、银浆和 各向异性导电胶中任意两个或三个的混合物 ,具体地,当电极较短时可以选用银浆、碳浆或 各向异性导电胶, 或者为碳浆、银浆和 各向异性导电胶中任意两个或三个的混合物 ,当电极较长时较佳地选用银浆。选用 各向异性导电胶制作电极时,需要 注意保证通过焊接、打线或热压的连接方式使电极连接电容触摸屏的控制电路时,控制电路能通过电极实现与相应的触控单元之间的电连接,例如以焊接、打线或热压的外部电路的电极的位置应当位于与相应的触控单元走线在第一表面的法线方向上重合的电极部分。各个电极的颜色与颜色层 603 的颜色相同。
制作本实施中的电容触摸屏的具体步骤如下:
第一步、在基板 601 上制作触控单元和触控单元走线。
本实施例中以采用单层导电膜的制作工艺为例进行说明,其使用同一层导电膜形成触控单元和触控单元走线。
具体地,在本步骤中,首先取用一片玻璃基板作为基板 601 ,其可以选用钢化玻璃基板、强化玻璃基板或普通玻璃基板,也可以选用高分子材料透明基板作为基板 601 ;然后,对基板 601 进行清洗,选定完成清洗的基板 601 的一个表面作为第一表面;然后,在基板 601 的第一表面上沉积一层导电膜,本实施例中沉积的为 ITO 膜,该 ITO 膜的厚度为 5~60nm ;然后,在导电膜上涂光刻胶,进行光刻以形成触控单元和触控单元走线的图案,本实施例中采用黄光光刻工艺;最后,刻蚀触控单元和触控单元走线的图案,去除光刻胶,在基板 601 的第一表面形成触控单元和触控单元走线。另外,还可以采用丝网印刷工艺直接在基板 601 的第一表面上形成触控单元和触控单元走线的图案的导电膜,由此在基板 601 的第一表面形成触控单元和触控单元走线。
本实施例中,各个触控单元走线的线宽为 0.003-0.1mm ,间距为 0.03-0.8mm 。
第二步、在触控单元走线上制作导电体。
具体地,使用碳浆,采用丝网印刷工艺在各个触控单元走线的端部(非连接触控单元的端部)形成导电体,其颜色与其后制备的颜色层 603 的颜色相同。较佳地,导电体的横截面(即平行于第一表面的截面)为圆形,直径约为 0.25-0.5mm 。在本发明的其他实施例中,导电体的横截面还可以是矩形、椭圆形等的形状。
第三步、在基板 601 上制作颜色层 603 ,颜色层 603 上具有通孔。
具体地,使用颜色油墨,采用丝网印刷工艺在基板 601 的第一表面上形成图案为电容触摸屏的边框区的颜色层 603 ,其厚度为 5-40μm ,其上具有通孔;通孔需与导电体对准,通孔的横截面为圆形,其直径为 0.1-0.3mm 。通孔沿第一表面的法线方向延伸,其一个端部与导电体相接,其另一个端部用于与电极相接。在其他的实施例中,形成的通孔的横截面还可以是矩形、椭圆形等的形状,较佳地,其形状的选择应当与导电体的形状相匹配。
第四步、制作电极,电极通过通孔与导电体相接。
具体地,使用银浆,采用丝网印刷工艺在颜色层 603 上形成电极,电极上设计为分布于通孔内的部分需与通孔对准,电极的厚度为 5-40μm 。另外,还可以采用激光蚀刻的方法形成电极,具体地为:在颜色层 603 的表面形成需要的电极厚度的银浆层,使用激光蚀刻银浆层,在颜色层 603 的表面形成各个电极。
最后,为了防止电极暴露在空气中被氧化,还可以在电极上覆盖一层绝缘层,这层绝缘层覆盖在除了电极的外接部分的整个电极上,其由颜色油墨、光油或颜色感光胶中的一个或多个形成,其图案可以是电容触摸屏的边框区或者仅覆盖电极。
以上详细描述了本发明的较佳具体实施例。应当理解,本领域的普通技术人员无需创造性劳动就可以根据本发明的构思做出诸多修改和变化。因此,凡本技术领域的技术人员依本发明的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案,皆应在由权利要求书所确定的保护范围内。

Claims (19)

  1. 一种电容触摸屏,包括基板、触控单元、绝缘层、电极和触控单元走线,所述触控单元和所述绝缘层分布在所述基板的第一表面上,所述触控单元分布在所述电容触摸屏的可操作区域内,所述绝缘层分布在所述电容触摸屏的边框区,其特征在于,所述触控单元走线在所述第一表面上从所述触控单元延伸;在所述边框区,所述绝缘层部分地覆盖所述触控单元走线,所述电极与所述触控单元走线在所述触控单元走线未被所述绝缘层覆盖的部分处电连接。
  2. 如权利要求1所述的电容触摸屏,其中所述绝缘层是由颜色油墨、光油或颜色感光胶中的一个或多个形成的颜色层。
  3. 如权利要求2所述的电容触摸屏,其中所述颜色层上具有一个或多个通孔,所述一个或多个通孔的一个端部与所述触控单元走线相接,所述一个或多个通孔沿所述第一表面的法线方向延伸。
  4. 如权利要求3所述的电容触摸屏,其中所述电极在所述颜色层上延伸并进入所述一个或多个通孔内,所述电极在所述一个或多个通孔内的部分与所述触控单元走线接触。
  5. 一种电容触摸屏的制作方法,用于制作如权利要求4所述的电容触摸屏,其特征在于,包括:
    第一步、在所述基板上制作所述触控单元和所述触控单元走线;
    第二步、在所述基板上制作所述颜色层,所述颜色层上具有所述一个或多个通孔;
    第三步、制作所述电极,所述电极部分地分布在所述一个或多个通孔内。
  6. 如权利要求所3述的电容触摸屏,其中所述电极在所述颜色层上延伸;所述一个或多个通孔内有导体,所述电极至少部分地覆盖所述导体并通过所述导体与所述触控单元走线电连接。
  7. 一种电容触摸屏的制作方法,用于制作如权利要求6所述的电容触摸屏,其特征在于,包括:
    第一步、在所述基板上制作所述触控单元和所述触控单元走线;
    第二步、在所述基板上制作所述颜色层,所述颜色层上具有所述一个或多个通孔;
    第三步、在所述一个或多个通孔内布置所述导体,以及制作所述电极。
  8. 如权利要求所6述的电容触摸屏,其中所述导体还分布在所述一个或多个通孔之外,所述导体在所述一个或多个通孔之外的部分与所述电极相接触。
  9. 一种电容触摸屏的制作方法,用于制作如权利要求8所述的电容触摸屏,其特征在于,包括:
    第一步、在所述基板上制作所述触控单元和所述触控单元走线;
    第二步、在所述基板上制作所述颜色层,所述颜色层上具有所述一个或多个通孔;
    第三步、在所述颜色层上制作所述电极,以及布置所述导体。
  10. 如权利要求2所述的电容触摸屏,其中所述电极为各向异性导电层;所述各向异性导电层在垂直于所述第一表面的方向导电,在平行于所述基板的所述第一表面的方向不导电;所述颜色层上具有开孔,所述电极至少部分地在所述开孔内,所述电极在所述开孔内的部分与所述触控单元走线接触。
  11. 如权利要求10所述的电容触摸屏,其中所述开孔是单孔开孔或多孔开孔。
  12. 一种电容触摸屏的制作方法,用于制作如权利要求11所述的电容触摸屏,其特征在于,包括:
    第一步、在所述基板上制作所述触控单元和所述触控单元走线;
    第二步、在所述基板上制作所述颜色层,所述颜色层上具有所述开孔;
    第三步、制作所述电极。
  13. 如权利要求2所述的电容触摸屏,其中还包括第二颜色层,所述电极部分地覆盖所述颜色层,所述第二颜色层部分地覆盖所述触控单元走线和所述电极,所述第二颜色层至少部分地覆盖所述颜色层;所述第二颜色层是绝缘的。
  14. 一种电容触摸屏的制作方法,用于制作如权利要求13所述的电容触摸屏,其特征在于,包括:
    第一步、在所述基板上制作所述触控单元和所述触控单元走线;
    第二步、在所述基板上制作所述颜色层;
    第三步、制作所述电极;
    第四步、制作所述第二颜色层。
  15. 如权利要求2所述的电容触摸屏,其中还包括导电体,所述颜色层上具有一个或多个通孔,所述导电体的一个端面与所述触控单元走线相接,所述导电体的另一个端面与所述一个或多个通孔相接;所述电极在所述颜色层上延伸并通过所述一个或多个通孔与所述导电体接触。
  16. 如权利要求15所述的电容触摸屏,其中所述触控单元走线不接触所述一个或多个通孔的边缘;所述电极部分地分布在所述一个或多个通孔中,所述电极在所述一个或多个通孔中的部分与所述导电体接触,所述电极通过所述导电体与所述触控单元走线电连接。
  17. 一种电容触摸屏的制作方法,用于制作如权利要求16所述的电容触摸屏,其特征在于,包括:
    第一步、在所述基板上制作所述触控单元和所述触控单元走线;
    第二步、在所述触控单元走线上制作所述导电体;
    第三步、在所述基板上制作所述颜色层,所述颜色层上具有所述一个或多个通孔;
    第四步、制作所述电极,所述电极部分地分布在所述一个或多个通孔中,所述电极与所述导电体接触。
  18. 如权利要求4、6、8、11、13或16所述的电容触摸屏,其中还包括第二绝缘层,所述第二绝缘层覆盖在所述电极上。
  19. 如权利要求18所述的电容触摸屏,其中所述电极的用于与所述电容触摸屏的控制电路电连接的部分为所述电极的外接部分,所述电极的外接部分未被所述第二绝缘层覆盖。
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