CN110888557A - Capacitive touch screen and manufacturing method thereof - Google Patents
Capacitive touch screen and manufacturing method thereof Download PDFInfo
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- CN110888557A CN110888557A CN201911351792.6A CN201911351792A CN110888557A CN 110888557 A CN110888557 A CN 110888557A CN 201911351792 A CN201911351792 A CN 201911351792A CN 110888557 A CN110888557 A CN 110888557A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 47
- 230000006698 induction Effects 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims description 32
- 239000011248 coating agent Substances 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 16
- 239000004020 conductor Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000007639 printing Methods 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 91
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- 238000010586 diagram Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
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- 238000010146 3D printing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000010329 laser etching Methods 0.000 description 3
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- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
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- 230000007547 defect Effects 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a manufacturing method of a capacitive touch screen and the capacitive touch screen. The manufacturing method of the capacitive touch screen comprises the steps of forming patterned induction electrode layers on two flexible substrates respectively, oppositely attaching the surfaces, provided with the induction electrode layers, of the flexible substrates, and meanwhile, arranging an insulating bonding layer between the induction electrode layers to enable a first induction electrode layer on the first flexible substrate and a second induction electrode layer on the second flexible substrate to be insulated from each other. The invention also discloses a capacitive touch screen manufactured by the method.
Description
Technical Field
The invention relates to the technical field of capacitive touch screens, in particular to a capacitive touch screen and a manufacturing method thereof.
Background
With the continuous development of the current social information interaction technology, more and more fields need self-service terminal equipment for human-computer interaction, and the touch screen is used as a main carrier of human-computer interaction touch and rapidly enters various fields of life. At present, the main capacitive touch screen on the market is designed and produced based on the screen size of a mobile phone or a Pad, and some touch requirements such as an infrared touch screen can be well adapted to a large screen and an oversized screen, but infrared touch has a series of problems of poor light interference resistance, poor touch precision and the like, and a large-size capacitive touch screen can well solve the defects of the infrared touch screen, but the large-size capacitive touch screen has the defects of low production yield, high cost, instability and the like, and currently, most manufacturers in the industry are still puzzled.
At present, several processes for manufacturing capacitive touch screens are available in the market, namely a process for manufacturing large-size capacitive screens by using ITO glass made of glass materials, namely G & G, a process for manufacturing capacitive screens by using a yellow light process, a laser etching process, an imprinting process, a transfer printing process and other technologies based on a nano silver process, a metal grid touch screen manufactured by using a yellow light or printing process, and a process for manufacturing the capacitive touch screens by printing superfine metal wires based on 3D at low cost.
Disclosure of Invention
The invention provides a capacitive touch screen and a manufacturing method thereof. The invention discloses the following technical scheme:
providing a first flexible substrate, and forming a patterned first sensing electrode layer on the first flexible substrate;
providing a second flexible substrate, and forming a patterned second sensing electrode layer on the second flexible substrate;
the first flexible substrate and the second flexible substrate are oppositely attached in a mode that the induction electrode layers face each other, and meanwhile, an insulating bonding layer is arranged between the first induction electrode layer and the second induction electrode layer, so that the first induction electrode layer on the first flexible substrate and the second induction electrode layer on the second flexible substrate are insulated from each other. The flexible touch screen or the touch membrane is manufactured in an opposite attaching mode, so that the flexible touch screen or the touch membrane is simpler, easier and more modularized to manufacture.
Preferably, the first flexible substrate of the patterned first sensing electrode layer is formed by the conductive coating liquid in a mode of interval coating; the second flexible substrate of the patterned second sensing electrode layer is formed by the conductive coating liquid in an interval coating mode; the first induction electrode layer on the first flexible substrate is attached and connected with the second induction electrode layer on the second flexible substrate in an opposite mode, and the first induction electrode layer and the second induction electrode layer are insulated from each other. The patterned induction electrode layer is formed by the way of coating the conductive coating liquid at intervals, and the patterned treatment can be carried out again without the mode of photoetching or laser etching and the like after coating, so that the manufacturing process is greatly simplified, and the manufacturing cost is reduced.
Optionally, the first sensing electrode layer on the first flexible substrate is a sensing layer TX, the second sensing electrode layer on the second flexible substrate is a sensing layer RX, and the sensing layer TX and the sensing layer RX are bonded together through a glue layer.
Optionally, the flexible substrate is a flexible transparent film made of polymers such as PET or PI.
Optionally, the first sensing electrode layer and the second sensing electrode layer are strip-shaped, and the first sensing electrode layer and the second sensing electrode layer are arranged oppositely in a crossing or orthogonal manner.
Optionally, the capacitive touch screen further includes a trace-dense area, the first sensing electrode layer or the second sensing electrode layer is connected with the trace-dense area through a connecting block, and the trace-dense area is a printed ultrafine enameled wire.
Optionally, the capacitive touch screen further includes a connection block, and the connection block is used for connecting the first sensing electrode layer or the second sensing electrode layer with the routing-dense area.
Optionally, the connecting block is made of a flexible conductive material.
Optionally, the connecting block comprises an upper connecting block and a lower connecting block, and the upper connecting block is electrically connected with the lower connecting block; the upper connecting block is electrically connected with the first sensing electrode layer or the second sensing electrode layer, and the material selected by the upper connecting block has better physical adhesion with the sensing electrode layer; the lower connecting block is electrically connected with the wiring dense area, and the material selected by the lower connecting block is a tin-plated layer or other metal layer which can be melted and wraps the conductor part of the superfine enameled wire. The flexible connection of the sensing electrode area and the wiring dense area can be better realized by the connecting block, so that several areas of the touch screen are more modularized, and the problem of touch failure caused by the compatibility problem among different conductive materials is avoided.
Optionally, the routing dense area is a conductive stripe printed by ultrafine enameled wires and used for connecting the controller and the touch area.
Optionally, the distance between the conductive stripes is between 0.01mm and 8 mm.
Optionally, the connecting block is an elongated strip and comprises a plurality of individual connecting blocks, and the connecting block may also be a single connecting block.
Optionally, an ACF conductive tape is adhered to the upper connection block, or a conductive adhesive is adhered to the upper connection block.
Optionally, the lower connecting block is provided with tin plating, and the superfine enameled wire and the lower connecting block can be welded by laser.
Furthermore, a side of the first flexible substrate, which is far away from the first sensing electrode layer, is further plated with a shadow eliminating layer, and the shadow eliminating layer is configured to eliminate color difference stripes generated by the interleaving of the first sensing electrode layer and the second sensing electrode layer.
Optionally, the conductive solution is a nano silver solution, a graphene solution, a carbon nanotube solution, a conductive polymer solution, or other conductive solutions suitable for coating various metal or non-metal products.
According to the technical scheme, the capacitive touch screen manufactured based on the conductive coating liquid at intervals is manufactured by ingeniously utilizing the interval coating technology and additionally arranging the flexible connecting block, so that several areas of the touch screen become modularized, the touch areas can be quickly and efficiently coated and produced, dense areas can be realized through an ultrafine line 3D printing process, the structure greatly improves the production efficiency of the touch areas, the yield, the price and the efficiency of the dense areas are greatly improved, the cost is greatly reduced, and the popularization and the use of large-size touch screens are facilitated.
The invention also provides a manufacturing method of the touch screen, which comprises the following steps: providing a first flexible substrate, and forming a patterned first sensing electrode layer; providing a second flexible substrate, and forming a patterned second sensing electrode layer;
and oppositely attaching and connecting the first induction electrode layer on the first flexible substrate and the second induction electrode layer on the second flexible substrate, and insulating the first induction electrode layer and the second induction electrode layer.
Preferably, the induction electrode layer for forming the patterning is manufactured by coating the conductive coating liquid at intervals.
Optionally, the induction electrode layer formed in the patterning mode is manufactured in a photoetching or laser etching mode.
Optionally, an insulating adhesive layer is disposed between the first sensing electrode layer on the first flexible substrate and the second sensing electrode layer on the second flexible substrate.
Optionally, the first sensing electrode layer and the second sensing electrode layer are strip-shaped, a distance between the two strip-shaped conductive patterns is larger than a line width of the conductive patterns, and the conductive patterns on the first sensing electrode layer and the second sensing electrode layer of the first flexible substrate are arranged in a parallel, staggered and opposite manner, so that insulation between the first sensing electrode layer and the second sensing electrode layer is ensured. The insulating layer can be omitted, and simple flexible touch control film or touch control screen can still be manufactured by utilizing the edge field effect.
Optionally, the first sensing electrode layer and the second sensing electrode layer are strip-shaped, and the two first sensing electrode layers and the second sensing electrode layer are arranged in an intersecting or orthogonal manner.
Optionally, the capacitive touch screen further includes a dense wiring area, the first sensing electrode layer or the second sensing electrode layer is connected with the dense wiring area through a connecting block, and the dense wiring area is formed by printing a superfine enameled wire.
Optionally, the capacitive touch screen further includes a connection block, and the connection block is used for connecting the first sensing electrode layer or the second sensing electrode layer with the routing-dense area.
Optionally, the connecting block is made of a flexible conductive material.
Optionally, the connecting block comprises an upper connecting block and a lower connecting block, and the upper connecting block is electrically connected with the lower connecting block; the upper connecting block is electrically connected with the first sensing electrode layer or the second sensing electrode layer, and the material selected by the upper connecting block has better physical adhesion with the sensing electrode layer; the lower connecting block is electrically connected with the wiring dense area, and the material selected by the lower connecting block is a tin-plated layer or other metal layer which can be melted and wraps the conductor part of the superfine enameled wire. The flexible connection of the sensing electrode area and the wiring dense area can be better realized by the connecting block, so that several areas of the touch screen are more modularized, and touch failure caused by compatibility problems among different conductive materials is avoided.
Optionally, the routing dense area is a conductive stripe printed by ultrafine enameled wires and used for connecting the controller and the touch area.
Optionally, the first sensing electrode layer or the second sensing electrode layer is connected with the wiring dense area through a connecting block, and the wiring dense area is formed by printing a superfine enameled wire.
Optionally, the distance between the conductive stripes is between 0.01mm and 8 mm.
Optionally, the connecting block is an elongated strip and comprises a plurality of individual connecting blocks, and the connecting block may also be a single connecting block.
Optionally, an ACF conductive tape is adhered to the upper connection block, or a conductive adhesive is adhered to the upper connection block.
Optionally, the lower connecting block is provided with tin plating, and the superfine enameled wire and the lower connecting block can be welded by laser.
Furthermore, a side of the first flexible substrate, which is far away from the first sensing electrode layer, is further plated with a shadow eliminating layer, and the shadow eliminating layer is configured to eliminate color difference stripes generated by the interleaving of the first sensing electrode layer and the second sensing electrode layer.
The manufacturing method of the capacitive touch screen is based on the capacitive touch screen manufactured by coating the conductive coating liquid at intervals, and respectively manufacturing and insulating assembling of the flexible substrates. In addition, by adding a connecting block which is compatible with different materials, parts of the touch screen can be manufactured and assembled in a modularized mode, the touch area can be coated and produced quickly and efficiently, and the dense area can be achieved through a superfine line 3D printing process. The manufacturing method greatly improves the production efficiency of the touch area, greatly improves the yield, price and efficiency of the dense area, greatly reduces the cost and is convenient for popularization and use of large-size touch screens.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments thereof, made with reference to the following drawings, which briefly describe the embodiments or the prior art descriptions in which reference is made:
FIG. 1 shows a capacitive touch panel manufactured by alternately coating conductive coating liquid according to the present invention
A schematic structural diagram of an RX sensing layer;
FIG. 2 shows a capacitive touch panel manufactured by alternately coating conductive coating liquid according to the present invention
A schematic structural diagram of a TX sensing layer;
FIG. 3 is a schematic structural diagram of a capacitive touch screen manufactured by alternately coating conductive coating liquid, wherein a dense area of the capacitive touch screen is connected with a TX channel;
fig. 4 is a schematic structural diagram of densely connected RX channels of a capacitive touch screen according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a connection block of a capacitive touch panel according to an embodiment of the present invention;
fig. 6 is a schematic view of an overall structure of a capacitive touch screen according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical solutions of the present invention and to more clearly illustrate the technical means and technical effects adopted to achieve the objects of the present invention, the following detailed descriptions of the manufacturing method of the capacitive touch screen and the combined specific implementation, structure and features of the capacitive touch screen according to the present invention are provided with reference to the accompanying drawings and the preferred embodiments.
The embodiment of the invention provides a manufacturing method of a capacitive touch screen,
as shown in fig. 1, the RX sensing layer 1 of the capacitive touch screen manufactured by coating the conductive coating liquid at intervals is schematically structured, the RX sensing layer 1 is based on a PET substrate, and is coated with spaced conductive stripes 3, the conductive stripes 3 are coated on the PET substrate by a nano silver aqueous solution and a spaced coating process, so that the formed spacing is uniform, and the width and distance of the stripes are determined according to the total size and the number of channels of the capacitive touch screen to be manufactured.
As shown in fig. 2, the schematic structure of the TX sensing layer (2) of the capacitive touch screen manufactured by alternately coating the conductive coating liquid is shown, the TX sensing layer 2 is also based on a PET substrate, and is coated with the spaced conductive stripes 3, and the structure of the TX sensing layer is the same as the principle of the RX sensing layer.
The conductive stripes 3 may also be coated with other conductive liquid suitable for coating at intervals, such as other nano-metal or coating liquid prepared from conductive materials such as carbon nanotubes, carbon fibers, etc., and the distance between the conductive stripes 3 is 0.01mm-8 mm.
It should be apparent that the drawings in the following description are merely exemplary embodiments of the present invention, and that other design drawings may be obtained by those skilled in the art without inventive exercise.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.
In the following description, further specific details are set forth to provide a thorough understanding of the present invention, but the present invention may be practiced in other embodiments that depart from the specific details disclosed herein, and such modifications may be readily apparent to those skilled in the art without departing from the spirit of the present invention and the scope of the appended claims.
As shown in fig. 3 and 4, the TX and RX channels are connected to the dense area of the capacitive touch screen manufactured by applying the conductive coating liquid at intervals, and the TX dense area 4 and the RX dense area 5 are arranged into a required pattern by the ultrafine enameled wires 8 in a 3D printing manner. As shown in fig. 5, the schematic structural diagram of the connecting block of the capacitive touch screen manufactured based on the interval coating of the conductive coating liquid, wherein the connecting block consists of two parts, the part connected with the conductive stripe 3 is an upper connecting block 6, one part connected with the dense area is a lower connecting block 7, an upper connecting block 6 is communicated with the lower connecting block 7, and the upper connecting block 6 is provided with a conductive material which is adhered or fixedly connected with the conductive stripes 3, the conductive material is ACF conductive adhesive tape, or adhesive which is adhered with conductive material and is used for bonding, a tin plating layer or other metal layers which can be melted when being welded with the superfine enameled wire 8 and can wrap the conductor part of the superfine enameled wire 8 are arranged on the lower connecting block 7, and the connecting block can be a long strip, comprises a plurality of independent connecting blocks and can also be a single connecting block.
As shown in fig. 6, the RX sensing layer 1 and the TX sensing layer 2 are bonded together by an insulating adhesive, which may be OCA adhesive or other insulating adhesive material with stable properties and will not corrode or oxidize with the conductive stripes.
A layer of shadow eliminating material is further plated on the upper surface of the capacitive touch screen and on the surface close to the cover plate glass, and is used for eliminating chromatic aberration grains generated by criss-cross of the conductive stripes on the TX and RX induction layers.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications should be considered as the protection scope of the present invention.
It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A manufacturing method of a capacitive touch screen is characterized by comprising the following steps: providing a first flexible substrate, forming a patterned first feel on the first flexible substrate
An electrode layer;
providing a second flexible substrate, and forming a patterned second sensing electrode layer on the second flexible substrate;
and oppositely attaching the surfaces, provided with the sensing electrode layers, of the first flexible substrate and the second flexible substrate, and meanwhile, arranging an insulating bonding layer between the first sensing electrode layer and the second sensing electrode layer to enable the first sensing electrode layer on the first flexible substrate and the second sensing electrode layer on the second flexible substrate to be insulated from each other.
2. The method for manufacturing the capacitive touch screen according to claim 1, wherein: the patterned induction electrode layer is coated by using conductive coating liquid through intervals
And (4) forming the formula (II).
3. The method for manufacturing the capacitive touch screen according to claim 1, wherein: and forming a superfine enameled wire on the capacitive touch screen in a printing mode.
4. The method for manufacturing the capacitive touch screen according to claim 1, wherein: the first induction electrode layer or the second induction electrode layer is connected with the first induction electrode layer or the second induction electrode layer through the connecting blocks
The second induction electrode layer is electrically connected with the superfine enameled wire.
5. A capacitive touch screen, comprising:
a first flexible substrate having a patterned first sensing electrode layer; a second flexible substrate having a patterned second sensing electrode layer;
the first induction electrode layer on the first flexible substrate is attached and connected with the second induction electrode layer on the second flexible substrate in an opposite mode, and the first induction electrode layer is insulated from the second induction electrode layer.
6. The capacitive touch screen of claim 5, further comprising:
an insulating bonding layer disposed between a first sensing electrode layer on the first flexible substrate and a second sensing electrode layer on the second flexible substrate.
7. The capacitive touch screen of claim 5, further comprising:
and the routing dense area is formed by printing superfine enameled wires.
8. The capacitive touch screen of claim 7, further comprising:
the connecting block is used for connecting the first sensing electrode layer or the second sensing electrode layer with the wiring dense area.
9. The capacitive touch screen of claim 8, wherein:
the connecting block comprises an upper connecting block and a lower connecting block, and the upper connecting block is electrically connected with the lower connecting block;
the upper connecting block is electrically connected with the first induction electrode layer or the second induction electrode layer, and materials selected by the upper connecting block have good physical adhesion with the induction electrode layer;
the lower connecting block is electrically connected with the wiring dense area, and the lower connecting block is made of a material which can be melted and can wrap a tin coating or other metal layers of the conductor part of the superfine enameled wire.
10. The capacitive touch screen according to any one of claims 5 to 9, wherein:
the surface, far away from the first sensing electrode layer, of the first flexible substrate is further plated with a shadow eliminating layer which is configured to eliminate color difference stripes generated by the staggering of the first sensing electrode layer and the second sensing electrode layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911351792.6A CN110888557A (en) | 2019-12-24 | 2019-12-24 | Capacitive touch screen and manufacturing method thereof |
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| CN201911351792.6A CN110888557A (en) | 2019-12-24 | 2019-12-24 | Capacitive touch screen and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112306288A (en) * | 2020-09-24 | 2021-02-02 | 苏州思尔维纳米科技有限公司 | Touch device and processing method thereof |
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| CN105930015A (en) * | 2016-04-13 | 2016-09-07 | 苏州触动电子科技有限公司 | Novel capacitance touch panel manufacture method |
| KR101749861B1 (en) * | 2016-03-07 | 2017-06-21 | 연세대학교 산학협력단 | Touch panel and method for manufaturing thereof |
| CN212586859U (en) * | 2019-12-24 | 2021-02-23 | 苏州敏柔电子科技有限公司 | Capacitive touch screen |
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2019
- 2019-12-24 CN CN201911351792.6A patent/CN110888557A/en active Pending
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| US20140015767A1 (en) * | 2012-07-10 | 2014-01-16 | E Ink Holdings Inc. | Touch panel and manufacturing method thereof and touch display panel |
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