WO2017159136A1 - Input device and production method therefor - Google Patents

Abstract

[Problem] To provide a three-dimensionally shaped input device allowing accurate positioning to be carried out in such a manner as to dispose a conduction pattern at a desired location. [Solution] The invention comprises a sheet-shaped input member 10 allowing for input operations, wherein the input member 10 comprises: a sheet-shaped first heat-curing resin 11 that is flexible and stretchable, and has insulating properties; and a conduction pattern 15 that is flexible, stretchable, and electrically conductive. According to this configuration, when installing the input device 1 along the surface of a base member 80, the input member 10 can be stretched to match the shape thereof, therefore, positioning can be carried out accurately in such a manner that the electric conduction pattern 15 is disposed at the desired location.

Description

Input device and manufacturing method thereof

The present invention relates to an input device having a three-dimensional shape and a manufacturing method thereof.

Conventionally, a wiring sheet that has been printed on a sheet substrate such as PC or PET by screen printing with conductive ink such as Ag ink is formed by a method such as hot pressing or heating / vacuum / pressure forming, and then subjected to vacuum removal and laser extraction. Some are formed as three-dimensional wiring molded products by processing holes and outer shapes by a method such as processing.

For example, the wiring of a defogger (defrosting) provided on the rear window of an automobile shown in Patent Document 1 is formed by the same method. Patent Document 2 discloses a three-dimensional laminated wiring board in which a conductive pattern is formed by performing chemical plating on a three-dimensional solid surface. FIG. 14 is a schematic diagram for explaining a manufacturing process of the three-dimensional laminated wiring board 900 of Patent Document 2.
In the step shown in FIG. 14A, a plating catalyst 902 is printed on a resin insulating film 901 spreading in a flat plate shape. Next, in the step shown in FIG. 14B, the insulating film 901 is heated and molded so as to form a three-dimensional solid surface by a molding die. Further, in the step shown in FIG. 14C, the formed insulating film is subjected to chemical plating treatment. As a result, a metallic conductor pattern 912 is formed on the portion where the plating catalyst 902 is printed.

JP-A-6-170883 JP 2013-187246 A

However, in the conventional method, since the three-dimensional shape is formed by the molding die, it is difficult to shape the conductor pattern when the conductor pattern is drawn around a curved surface having a large curvature or a plurality of surfaces, and the resulting conductor pattern is displaced. There was a risk of it. In particular, when a three-dimensional input device is constituted by these three-dimensional wiring boards, there arises a problem that the input operation cannot be performed well when a displacement of the conductor pattern occurs.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and to provide a three-dimensional input device capable of accurately positioning a conductive pattern at a desired location and a method for manufacturing the same. To do.

An input device according to the present invention is an input device that can be integrally disposed along the surface of a three-dimensional base member, and includes a sheet-like input member that can perform an input operation, and the input member is flexible. And a sheet-like first thermosetting resin having extensibility and insulation, and a conductive pattern having flexibility, extensibility, and conductivity.

According to this configuration, when the input device is disposed along the surface of the base member, the input member can be extended in accordance with the shape, so that the positioning is accurately performed so that the conductive pattern is disposed at a desired location. Can be done.

In the input device of the present invention, it is preferable that the input member has an elongation of 200% or more when the thickness dimension is approximately 100 μm.

According to this configuration, it is easy to arrange the conductive pattern in accordance with the desired position of the base member.

In the input device of the present invention, the input member includes a connection portion for electrically connecting the conductive pattern to the outside, and the connection portion is made of a material harder than the first thermosetting resin. It is preferable that the second thermosetting resin is included and a part of the conductive pattern is exposed from the first thermosetting resin and the second thermosetting resin.

According to this configuration, the second thermosetting resin made of a hard material can suppress the dispersion of the pressing force when the external connection terminal is pressed against the conductive pattern, and the thermocompression bonding can be performed more reliably. it can.

Further, in the input device of the present invention, a hole is disposed in the input member, and a reinforcing portion made of a material harder than the first thermosetting resin is provided along an opening end portion surrounding the hole. It may be provided.

According to this configuration, when the first thermosetting resin is stretched, the first thermosetting resin is easily torn from the corner of the hole, but since the reinforcing portion is provided, it is possible to prevent the tear from being generated from the hole. it can.

Further, in the input device of the present invention, a hole is disposed in the input member, the first thermosetting resin is light transmissive, and the first thermosetting resin is provided in the hole. It is good also as what has a 3rd thermosetting type resin provided with the softness | flexibility and extensibility while having a different color.

According to this configuration, the color of the base member and the metallic luster can be visually observed through the first thermosetting resin. Moreover, an illuminating member such as an LED can be arranged on the base member, and can be illuminated as necessary.

In the input device of the present invention, the conductive pattern includes a first electrode portion and a second electrode portion that is insulated from the first electrode portion, and the first electrode portion and the first electrode portion It is comprised so that the change of the electrostatic capacitance produced between 2 electrode parts can be detected.

According to this configuration, a three-dimensional curved electrostatic sensor can be obtained.

Further, the input device of the present invention is characterized in that the first thermosetting resin is a polyester-based polymer having isocyanate as a crosslinking agent.

This configuration is excellent in flexibility and extensibility.

The input device manufacturing method of the present invention is an input device manufacturing method in which a sheet-like input member capable of input operation is integrally disposed along a surface of a base member, and an isocyanate compound is used as a crosslinking agent. The first ink material containing a thermosetting polyester resin as a main component is printed to form a first coating film in a predetermined shape, and the first coating film is cured by applying heat to form the input member A base sheet forming step for forming a base sheet portion, and a second ink material containing a conductive material and containing a thermosetting polyester resin having an isocyanate compound as a crosslinking agent as a main component, on one side of the base sheet portion Forming a second coating film by printing in a predetermined shape, and forming a conductive pattern by curing the second coating film; and the conductive pattern is formed. The third ink material made of the same component as the first ink material is printed on the one surface side of the base sheet portion to form a third coating film, and the third coating film is cured by applying heat to the third coating film. A cover sheet forming step for forming a cover sheet portion constituting the input member; and a three-dimensional step for integrally arranging the input member by extending the input member in a three-dimensional shape along the surface of the base member. It is characterized by.

According to this configuration, a sheet-like input member can be formed by screen-printing an ink material mainly composed of a thermosetting polyester resin in a predetermined shape to form a coating film and curing it. Accordingly, there is no need for a punching die for extracting with a predetermined outer shape, and there is no need for punching. In addition, the base sheet part, cover sheet part, and conductive pattern are all made of thermosetting polyester resin with an isocyanate compound as a cross-linking agent. Can be made.

In the input device manufacturing method of the present invention, the fourth ink material is printed on a portion of the one surface of the base sheet portion between the base sheet forming step and the conductive pattern forming step, and then cured. Forming a fourth coating film having a property of becoming harder than the base sheet section, and forming a receiving section that is cured by applying heat to the fourth coating film; In the pattern forming step, the second ink material is printed on the base sheet portion and the receiving portion, and in the cover sheet forming step, the third ink material is printed on the conductive pattern formed on the receiving portion. Forming the third coating film by printing in a predetermined shape avoiding a part, forming the cover sheet part by applying heat to the third coating film to form the cover sheet part, and in the region of the receiving part The conductive pattern It may be configured to form a connection portion to expose part.

According to this configuration, the receiving portion can be formed by printing and thermosetting, and the connecting portion where a part of the conductive pattern is exposed can be formed in the region of the receiving portion.

Further, in the input device manufacturing method of the present invention, in the base sheet forming step, the first coating film is formed so as to provide an opening region at a predetermined location, and in the cover sheet forming step, the opening region is formed. You may form a hole in the location corresponding to the said opening area | region of the said input member by forming the said 3rd coating film so that it may avoid.

According to this configuration, the hole can be formed without using a punching die or the like.

In the input device manufacturing method of the present invention, after the base sheet forming step or after any step after the base sheet forming step, the fifth ink material is printed on the region surrounding the opening region and then cured. Forming a fifth coating film having a property of becoming harder than the base sheet portion, and forming a reinforcing portion that is cured by applying heat to the fifth coating film; You may form the said reinforcement part along the opening edge part surrounding the said hole part of a member.

According to this configuration, the reinforcing portion can be formed by printing and thermosetting.

Further, in the method for manufacturing an input device of the present invention, in the base sheet forming step, the first coating film is formed so as to provide an opening region at a predetermined position, and in the receiving portion forming step, the opening region is formed. Forming the fourth coating film so as to avoid the formation of the third coating film so as to avoid the opening region in the cover sheet forming step, and corresponding to the opening region of the input member; A hole may be formed.

According to this configuration, the hole can be formed without using a punching die or the like.

Further, in the input device manufacturing method of the present invention, in the receiving portion forming step, the fourth coating film is formed in a region surrounding the opening region, and the opening end portion surrounding the hole portion of the input member is formed. You may form the reinforcement part which followed.

According to this configuration, the reinforcing portion can be formed by printing and thermosetting.

In the method for manufacturing an input device of the present invention, a colored sixth coating film is formed on the entire interior of the hole, the main component being a thermosetting polyester resin containing an isocyanate compound as a crosslinking agent. There may be provided an illuminating part forming step of printing a sixth ink material, curing the sixth coating film, and forming an illuminating part having a color different from that of the base sheet part.

According to this configuration, the illumination portion can be formed by printing and thermosetting.

Moreover, the manufacturing method of the input device according to the present invention includes a release sheet on which the first ink material is printed in the base sheet forming step, and the release sheet has a surface tension of approximately 30 mN / m or less. It is characterized by being.

According to this configuration, the first coating film printed on the release sheet is not repelled, and the base sheet portion on which the first coating film is cured can be easily peeled off from the release sheet.

According to the present invention, when the input device is disposed along the surface of the base member, since the input member can be extended in accordance with the shape, positioning can be accurately performed so that the conductive pattern is disposed at a desired location. Can be done. Therefore, an input device having a three-dimensional shape can be provided.

In addition, according to the method for manufacturing an input device of the present invention, a sheet-like input member is formed by screen-printing an ink material mainly composed of a thermosetting polyester resin into a predetermined shape to form a coating film and curing it. Can be formed. Accordingly, there is no need for a punching die for extracting with a predetermined outer shape, and there is no need for punching. In addition, the base sheet part, cover sheet part, and conductive pattern are all made of thermosetting polyester resin with an isocyanate compound as a cross-linking agent. Can be made. Therefore, an input device having a three-dimensional shape can be manufactured.

It is a disassembled perspective view which shows the input device of 1st Embodiment. FIG. 2A is a perspective view illustrating the input device according to the first embodiment of the present invention, FIG. 2A is a perspective view before extending according to the shape, and FIG. 2B is arranged along the surface of the base member. It is the provided perspective view. It is a schematic plan view which shows the input device of 1st Embodiment. FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 3. It is a schematic cross section which shows the input device of a 1st modification. FIG. 6 is a schematic diagram illustrating a base sheet forming process in the manufacturing process of the input device according to the first embodiment, FIG. 6A is a schematic plan view, and FIG. 6B is a VI-VI line in FIG. It is the schematic cross section cut | disconnected by. FIGS. 7A and 7B are schematic views illustrating a receiving portion forming process in the manufacturing process of the input device according to the first embodiment, FIG. 7A is a schematic plan view, and FIG. 7B is a VII-VII line in FIG. It is the schematic cross section cut | disconnected by. FIGS. 8A and 8B are schematic views showing a reinforcing portion forming process in the manufacturing process of the input device according to the first embodiment, FIG. 8A is a schematic plan view, and FIG. 8B is a line VIII-VIII in FIG. It is the schematic cross section cut | disconnected by. FIG. 9A is a schematic diagram illustrating a conductive pattern forming process in the manufacturing process of the input device according to the first embodiment, FIG. 9A is a schematic plan view, and FIG. 9B is a IX-IX line in FIG. It is the schematic cross section cut | disconnected by. FIGS. 10A and 10B are schematic views showing a cover sheet forming process in the manufacturing process of the input device according to the first embodiment, FIG. 10A is a schematic plan view, and FIG. 10B is an XX line in FIG. It is the schematic cross section cut | disconnected by. It is a schematic cross section which shows the 8th process in the manufacturing process of the input device of 1st Embodiment. It is a schematic cross section which shows the three-dimensional process in the manufacturing process of the input device of 1st Embodiment. FIGS. 13A and 13B are schematic cross-sectional views showing an illumination portion forming process in the manufacturing process of the input device of the first modification, FIG. 13A is a schematic plan view, and FIG. 13B is XIII-XIII in FIG. It is the schematic cross section cut | disconnected by the line. It is a schematic diagram explaining the manufacturing process of the conventional three-dimensional laminated wiring board, Fig.14 (a) is a schematic diagram which shows the process of printing the catalyst for plating, and FIG.14 (b) seems to comprise a three-dimensional solid surface FIG. 14C is a schematic diagram showing a process of performing chemical plating treatment.

[First Embodiment]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For easy understanding, the dimensions of the drawings are appropriately changed.

(Input device)
FIG. 1 is an exploded perspective view showing the input device 1. FIG. 2A is a perspective view showing the input device 1 of the first embodiment, FIG. 2A is a perspective view before being stretched in accordance with the shape, and FIG. 2B is arranged along the surface of the base member 80. FIG. 1 is an exploded perspective view of the input device 1 before being stretched, and FIGS. 2A and 2B are perspective views showing a cover sheet portion 52 described later through. FIG. 3 is a schematic plan view showing the input device 1. 4 is a cross-sectional view taken along line IV-IV in FIG.

The input device 1 according to the present embodiment is a touch sensor that detects contact of a finger or the like based on a change in capacitance, and is used by being electrically connected to an external electronic circuit or the like. As shown in FIGS. 1 to 4, the input device 1 includes a sheet-like input member 10 that can be input. As illustrated in FIG. 1, the input member 10 includes a sheet-like first thermosetting resin 11, a conductive pattern 15, and a second thermosetting resin 12. The first thermosetting resin 11 constitutes a base sheet portion 51 and a cover sheet portion 52. The second thermosetting resin 12 constitutes a receiving part 21 and a reinforcing part 30.

The first thermosetting resin 11 has flexibility, extensibility, and insulation. More specifically, it is a synthetic resin material mainly composed of a polyester-based high molecular polymer having isocyanate as a crosslinking agent. According to this configuration, it is excellent in flexibility and extensibility. The first thermosetting resin 11 is light transmissive. According to this configuration, the color and metallic luster of the base member 80 can be visually observed through the first thermosetting resin 11.

The conductive pattern 15 has flexibility, extensibility, and conductivity. More specifically, it is a conductive material containing as a main component a polyester-based high molecular polymer containing a metal and using an isocyanate as a crosslinking agent. For example, silver is used as the metal imparting conductivity. The conductive pattern 15 is sandwiched between the base sheet portion 51 and the cover sheet portion 52 made of the sheet-like first thermosetting resin 11 and is protected without exposing most of the conductive pattern 15.

The second thermosetting resin 12 is a harder material than the first thermosetting resin 11 and has an insulating property. More specifically, it is a synthetic resin material containing a melamine resin or a phenol resin.

The input member 10 is provided with a hole portion 10a, and includes a reinforcing portion 30 made of the second thermosetting resin 12 along an opening end portion surrounding the hole portion 10a. Further, the input member 10 includes a connection portion 20 for electrically connecting the conductive pattern 15 to the outside. The connection part 20 includes a receiving part 21 made of the second thermosetting resin 12 made of a material harder than the first thermosetting resin 11. In the connection portion 20, a part of the conductive pattern 15 is exposed from the first thermosetting resin 11 and the second thermosetting resin 12.

In the state where these resins are laminated, the input member 10 desirably has an elongation of 200% or more when the thickness dimension is approximately 100 μm. The elongation rate was calculated by attaching a rectangular test piece having a width of 15 mm to a tensile test jig at intervals of 50 mm in the longitudinal direction and evaluating the elongation resistance until breaking when the specimen was stretched in the longitudinal direction. In this embodiment, the thickness dimension is approximately 100 μm and the elongation is 200% to 300%. Therefore, the input device 1 of this embodiment can extend the input member 10 in accordance with the shape of the base member 80 described later.

The base member 80 is made of a metal material such as aluminum. In the present embodiment, the base member 80 has a desired outer shape of the input device 1 that functions as a touch sensor. Note that the base member 80 is not limited to a metal material, and may be, for example, a molded synthetic resin material. Further, as shown in FIG. 4, an illumination member 81 such as an LED is disposed on the base member 80.

The input device 1 of the present embodiment is disposed along the surface of a three-dimensional base member 80 as shown in FIGS. At this time, the input member 10 can be extended in accordance with the shape of the base member 80. Thus, positioning can be performed accurately so that the conductive pattern 15 is disposed at a desired location. Thereby, the input device 1 having a three-dimensional shape is configured. In addition, by extending the input member 10, a portion with a large elongation is thinner than a portion with a small elongation.

The input device 1 according to the present embodiment includes a conductive pattern 15 including a first electrode portion 15a and a second electrode portion 15b that is insulated from the first electrode portion 15a. It is configured to be able to detect a change in capacitance that occurs between the second electrode portion 15b. In the drawings used for explanation, the conductive pattern 15 is schematically shown for easy understanding, and is not optimized for the touch sensor.

Although omitted in FIGS. 1 to 4, the connection terminals 20 are connected to the connection terminals of the flexible wiring board with an anisotropic conductive paste or the like (see FIG. 11). The second thermosetting resin 12 made of a hard material can suppress the dispersion of the pressing force when the connection terminal of the flexible wiring board is pressed against the conductive pattern 15, so that the thermocompression bonding of the flexible wiring board can be performed more reliably. be able to.

In the input device 1 of the present embodiment, the hole 10a is provided corresponding to an illumination member 81 such as an LED housed inside the base member 80. Thereby, the light emission of the illumination member 81 is visually recognized from above the input member 10. Moreover, the reinforcement part 30 which consists of 2nd thermosetting resin 12 is provided along the opening edge part surrounding the hole 10a. When the hole 10a is formed in the input member 10, the first thermosetting resin 11 is easily broken from the corner of the hole 10a when stretched. However, in the input device 1 of the present embodiment, since the reinforcing portion 30 is provided, it is possible to prevent the tear from occurring from the hole portion 10a.

In addition, instead of the hole 10a of the input device 1, a third thermosetting resin 13 may be provided in that portion. FIG. 5 is a cross-sectional view showing the input device 2 of the first modification.

As shown in FIG. 5, the input device 2 is provided with an illumination unit 56 made of the third thermosetting resin 13 in the hole 10 a of the input device 1. The third thermosetting resin 13 is light transmissive, has a color different from that of the first thermosetting resin 11, and has flexibility and extensibility like the first thermosetting resin 11. Yes. More specifically, it is a synthetic resin material mainly composed of a polyester-based high molecular weight polymer containing isocyanate as a crosslinking agent, and a colorant is mixed. According to this configuration, the illumination member 81 such as an LED can be disposed on the base member 80 and the illumination unit 56 can be illuminated as necessary. In this case, even if the reinforcing portion 30 is not provided, the third thermosetting resin 13 is prevented from coming into close contact with the first thermosetting resin 11 and from being broken from the hole 10a. Can do. Note that the third thermosetting resin 13 is not limited to one type of color, and may be a plurality of types so that the plurality of hole portions 10a have different colors.

Hereinafter, the effects of the present embodiment will be described.

The input device 1 according to the present embodiment is an input device 1 that can be integrally disposed along the surface of a three-dimensional base member 80, and includes a sheet-like input member 10 that can perform an input operation. 10 has a sheet-like first thermosetting resin 11 having flexibility, extensibility, and insulation, and a conductive pattern 15 having flexibility, extensibility, and conductivity. .

According to this configuration, when the input device 1 is disposed along the surface of the base member 80, the input member 10 can be extended according to the shape, so that the conductive pattern 15 is disposed at a desired location. The positioning can be performed accurately.

Further, the first thermosetting resin 11 is a polyester-based polymer having isocyanate as a crosslinking agent. According to this configuration, it is excellent in flexibility and extensibility.

The input member 10 preferably has an elongation of 200% or more when the thickness dimension is approximately 100 μm. According to this configuration, it is easy to arrange the conductive pattern 15 in accordance with a desired position of the base member 80.

Further, the input member 10 includes a connection portion 20 for electrically connecting the conductive pattern 15 to the outside, and the connection portion 20 is a second thermosetting type material that is harder than the first thermosetting resin 11. It is preferable that the resin 12 is included and a part of the conductive pattern 15 is exposed from the first thermosetting resin 11 and the second thermosetting resin 12. According to this configuration, the second thermosetting resin 12 made of a hard material can suppress the dispersion of the pressing force when the external connection terminal is pressed against the conductive pattern 15, and the thermocompression bonding is more reliably performed. be able to.

Moreover, the hole 10a is arrange | positioned at the input member 10, and it is good also as a thing provided with the reinforcement part 30 which consists of a material harder than the 1st thermosetting resin 11 along the opening edge part surrounding the hole 10a. . According to this configuration, when the first thermosetting resin 11 is stretched, the first thermosetting resin 11 is easily broken from the corner of the hole 10a. However, since the reinforcing part 30 is provided, the first thermosetting resin 11 is broken from the hole 10a. Can be prevented.

The conductive pattern 15 includes a first electrode portion 15a and a second electrode portion 15b that is insulated from the first electrode portion 15a. The first electrode portion 15a and the second electrode portion 15b It is configured to be able to detect a change in capacitance generated during the period. According to this configuration, a three-dimensional curved electrostatic sensor can be obtained.

Further, the input device 2 of the first modified example is a third thermosetting resin having a color different from that of the first thermosetting resin 11 in the hole 10a of the input member 10 and having flexibility and extensibility. 13 According to this configuration, the color and metallic luster of the base member 80 can be visually observed through the first thermosetting resin 11. Further, an illuminating member 81 such as an LED can be disposed on the base member 80 and illuminated as necessary.

(Manufacturing method of input device)
6 is a schematic diagram showing a base sheet forming step in the manufacturing process of the input device 1, FIG. 6 (a) is a schematic plan view, and FIG. 6 (b) is a VI-VI line in FIG. 6 (a). It is the schematic cross section cut | disconnected by. FIG. 7 is a schematic view showing the receiving portion forming step, FIG. 7 (a) is a schematic plan view, and FIG. 7 (b) is a schematic cross-sectional view taken along the line VII-VII in FIG. 7 (a). is there. FIG. 8 is a schematic view showing a reinforcing portion forming step, FIG. 8 (a) is a schematic plan view, and FIG. 8 (b) is a schematic cross-sectional view cut along line VIII-VIII in FIG. 8 (a). is there. FIG. 9 is a schematic diagram showing a conductive pattern forming step, FIG. 9 (a) is a schematic plan view, and FIG. 9 (b) is a schematic cross-sectional view taken along line IX-IX in FIG. 9 (a). is there. FIG. 10 is a schematic view showing the cover sheet forming step, FIG. 10 (a) is a schematic plan view, and FIG. 10 (b) is a schematic cross-sectional view cut along the line XX of FIG. 10 (a). is there. FIG. 11 is a schematic cross-sectional view showing the eighth step. FIG. 12 is a schematic cross-sectional view showing a three-dimensional process.

In the method for manufacturing the input device 1 according to the present embodiment, in the base sheet formation step, as shown in FIG. The first coating film 41 is cured by applying heat to the first coating film 41. Thereby, the base sheet portion 51 is formed. The first ink material contains a thermosetting polyester resin having an isocyanate compound as a crosslinking agent as a main component and is prepared for printing such as screen printing.

The release sheet 50 is preferably one in which the printed first coating film 41 is not repelled and the base sheet portion 51 on which the first coating film 41 is cured can be easily peeled off. Specifically, a polyolefin-based synthetic resin sheet in which the surface tension of the printed surface with respect to the first coating film 41 is approximately 30 mN / m or less is suitable. For example, a synthetic resin sheet made of polyethylene or polypropylene can be used. While the 1st coating film 41 printed on the peeling sheet 50 is not flipped, the base sheet part 51 which hardened the 1st coating film 41 can be easily peeled from the peeling sheet 50. FIG. The release sheet 50 is extremely mass-productive if the synthetic resin sheet is wound in a roll shape and cut according to the size. Also, with other synthetic resin sheets, the surface tension of the printing surface with respect to the first coating film 41 may be about 30 mN / m or less, for example, release so that the surface tension of the printing surface is about 30 mN / m or less. It may have been processed.

The first coating film 41 is printed so that the base sheet portion 51 has a desired outer shape, and it is not necessary to cut the outer shape of the formed base sheet portion 51 in the subsequent steps. Further, the first coating film 41 is printed so as to provide an opening region 51a at a predetermined location, and the formed base sheet portion 51 does not need to be punched in the subsequent steps.

In this embodiment, the receiving part forming process is performed following the base sheet forming process. As shown in FIG. 7, in the receiving portion forming step, the fourth ink material is printed on a part of one surface of the base sheet portion 51 to form the fourth coating film 44, and the fourth coating film 44 is heated. Add to cure. The fourth ink material contains melamine resin or phenol resin as a main component and is prepared for printing such as screen printing. The fourth coating film 44 formed by printing the fourth ink material has a property of becoming harder than the base sheet portion 51 after curing. Thereby, the receiving part 21 is formed. In addition, the 4th coating film 44 is formed so that the opening area | region 51a may be avoided.

Furthermore, a reinforcement part formation process is performed following a receiving part formation process. As shown in FIG. 8, the reinforcing portion forming step prints the fifth ink material in a region surrounding the opening region 51a, and has a fifth coating film 45 having a property of becoming harder than the base sheet portion 51 after curing. And the fifth coating film 45 is cured by applying heat. The fifth ink material contains melamine resin or phenol resin as a main component and is prepared for printing such as screen printing. The fifth coating film 45 formed by printing the fifth ink material has a characteristic of becoming harder than the base sheet portion 51 after being cured.
Thereby, the reinforcing part 30 is formed.

In addition, the reinforcement part formation process may be performed simultaneously with a receiving part formation process. That is, the fourth coating film 44 is used instead of the fifth coating film 45, and the fourth coating film 44 is formed in the region surrounding the opening region 51 a in the receiving portion forming step, thereby forming the reinforcing portion 30. May be.

In this embodiment, next, a conductive pattern forming step is performed. In the conductive pattern forming step, as shown in FIG. 9, the second ink material is printed in a predetermined shape on one surface of the base sheet portion 51 and the receiving portion 21 to form the second coating film 42. The coating film 42 is cured. The second ink material contains a conductive material and is mainly composed of a thermosetting polyester resin having an isocyanate compound as a crosslinking agent, and is prepared for printing such as screen printing. Thereby, the conductive pattern 15 is formed.

Furthermore, a cover sheet forming step is performed following the conductive pattern forming step. In the cover sheet forming step, as shown in FIG. 10, a third ink material made of the same component as the first ink material is applied on the receiving portion 21 on one surface side of the base sheet portion 51 on which the conductive pattern 15 is formed. The third coating film 43 is formed by printing in a predetermined shape avoiding a part of the formed conductive pattern 15. Then, the third coating film 43 is cured by applying heat. Thereby, the cover sheet portion 52 is formed, and the connection portion 20 in which a part of the conductive pattern 15 is exposed in the region of the receiving portion 21 is formed. In addition, the 3rd coating film 43 is formed so that the opening area | region 51a may be avoided. The cover sheet portion 52 together with the base sheet portion 51 protects the conductive pattern 15 and constitutes the sheet-like input member 10. Moreover, the hole 10a of the input member 10 is provided by forming the cover sheet portion 52 so as to avoid the opening region 51a. Moreover, in this embodiment, the reinforcement part 30 is formed along the opening edge part surrounding the hole 10a of the input member 10. As shown in FIG.

Thus, the sheet-like input member 10 can be formed by screen-printing the ink material in a predetermined shape to form a coating film and curing it. Further, the hole 10a can be formed without using a punching die or the like. Further, since the base sheet portion 51, the cover sheet portion 52, and the conductive pattern 15 are all formed from a thermosetting polyester resin having an isocyanate compound as a crosslinking agent, the base sheet portion 51 and the cover sheet portion 52 are provided with flexibility and extensibility. It can be stretched into a shape.

Subsequently, the eighth step is performed. In the eighth step, as shown in FIG. 11, the flexible wiring board 60 is disposed so as to face the connection portion 20 of the input member 10, and thermocompression bonding is performed using a thermocompression bonding jig 61.

Then, a three-dimensional process is performed in which the input member 10 is integrally disposed along the surface of the base member 80. At this time, as shown in FIG. 12, the input member 10 peeled off from the release sheet 50 is stretched in a three-dimensional shape so as to be integrally disposed along the surface of the base member 80 and to perform desired positioning. be able to. By extending the input member 10, the portion with large elongation is thinner than the portion with small elongation.

Note that an adhesive layer may be added so as to be in close contact with the surface of the base member 80. The adhesive layer can be printed on the other surface of the base sheet 51 by screen printing or the like after the release sheet 50 is peeled off. In this case, it is preferable that the protective sheet is attached to the surface on the cover sheet portion 52 side. Further, contrary to the present embodiment, the cover sheet 52 side surface may be disposed in close contact with the surface of the base member 80. In this case, in order to add the adhesive layer, the adhesive layer can be printed on the surface on the cover sheet portion 52 side by screen printing or the like in the eighth step.

In addition, instead of the hole 10 a of the input device 1, an illumination unit 56 having a color different from that of the base sheet unit 51 may be formed in that portion. FIG. 13 is a schematic cross-sectional view showing an illumination portion forming process in the manufacturing process of the input device 2 of the first modification, FIG. 13 (a) is a schematic plan view, and FIG. 13 (b) is FIG. 3 is a schematic cross-sectional view taken along line XIII-XIII.

In the illumination portion forming step, the cover sheet portion 52 is formed so as to avoid the opening region 51a in the cover sheet forming step, so that the hole portion 10a of the input member 10 is provided, and then the entire area inside the hole portion 10a. As shown in FIG. 13, the sixth ink material that forms the sixth coating film 46 is printed, and the sixth coating film 46 is cured. The sixth ink material is mainly composed of a thermosetting polyester resin having an isocyanate compound as a crosslinking agent, is colored with a dye for coloring, and is prepared for printing such as screen printing. In addition, the sixth coating film 46 printed with the sixth ink material is cured and has light transmittance. As a result, an illumination unit 56 having a color different from that of the base sheet unit 51 is formed. According to this structure, the illumination part 56 can be formed by printing and thermosetting.

Moreover, since the illumination part 56 is formed from the thermosetting polyester resin which uses an isocyanate type compound as a crosslinking agent, it has a softness | flexibility and an extendibility and can be extended in a three-dimensional shape. Further, it is possible to prevent the tearing from occurring from the hole 10a.

Hereinafter, the effects of the manufacturing method of the present embodiment will be described.

In the manufacturing method of the input device 1 according to the present embodiment, the sheet-like input member 10 capable of input operation is integrally disposed along the surface of the base member 80. Then, a first ink material mainly composed of a thermosetting polyester resin having an isocyanate compound as a crosslinking agent is printed to form a first coating film 41 in a predetermined shape, and the first coating film 41 is heated. And a base sheet forming step of forming the base sheet portion 51 constituting the input member 10 by curing. Further, a second ink material containing a conductive material and having as a main component a thermosetting polyester resin containing an isocyanate compound as a cross-linking agent is printed on a surface of the base sheet portion 51 in a predetermined shape, and the second ink material is printed. A conductive pattern forming step of forming the conductive pattern 15 by forming the coating film 42 and curing the second coating film 42 is provided. Furthermore, the third coating film 43 is formed by printing the third ink material made of the same component as the first ink material on the one surface side of the base sheet portion 51 on which the conductive pattern 15 is formed. And a cover sheet forming step of forming the cover sheet portion 52 constituting the input member 10 by applying heat thereto. Furthermore, a three-dimensional process is provided in which the input member 10 is integrally disposed by extending the input member 10 in a three-dimensional shape along the surface of the base member 80.

According to this configuration, the sheet-like input member 10 can be formed by screen-printing an ink material mainly composed of a thermosetting polyester resin in a predetermined shape to form a coating film and curing it. Accordingly, there is no need for a punching die for extracting with a predetermined outer shape, and there is no need for punching. In addition, since the base sheet portion 51, the cover sheet portion 52, and the conductive pattern 15 are all formed from a thermosetting polyester resin having an isocyanate compound as a crosslinking agent, the base sheet portion 51 and the cover sheet portion 52 are provided with flexibility and extensibility. It can be stretched into a shape. Since the input member 10 can be extended according to the shape, positioning can be performed accurately so that the conductive pattern 15 is disposed at a desired location.

Further, in the base sheet forming step, the release sheet 50 on which the first ink material is printed is provided, and the release sheet 50 is characterized in that the surface tension of the printing surface is approximately 30 mN / m or less. According to this configuration, the first coating film 41 printed on the release sheet 50 is not repelled, and the base sheet portion 51 obtained by curing the first coating film 41 can be easily peeled off from the release sheet 50. it can.

In addition, the fourth ink material is printed on a part of one surface of the base sheet portion 51 between the base sheet forming step and the conductive pattern forming step, and has a characteristic of becoming harder than the base sheet portion 51 after curing. It has the receiving part formation process which forms the 4th coating film 44, and forms the receiving part 21 which applied the heat | fever to the 4th coating film 44, and was hardened, In a conductive pattern formation process, it is based on the 2nd ink material Printing is performed on the sheet portion 51 and the receiving portion 21, and in the cover sheet forming step, the third ink material is printed in a predetermined shape avoiding a part of the conductive pattern 15 formed on the receiving portion 21. The coating film 43 is formed, and the third coating film 43 is cured by applying heat to form the cover sheet portion 52, and the connection portion 20 in which a part of the conductive pattern 15 is exposed in the region of the receiving portion 21. What it forms It may be. According to this configuration, the receiving portion 21 can be formed by printing and thermosetting, and the connecting portion 20 in which a part of the conductive pattern 15 is exposed can be formed in the region of the receiving portion 21.

Further, in the base sheet forming step, the first coating film 41 is formed so as to provide the opening region 51a at a predetermined location, and in the cover sheet forming step, the third coating film 43 is formed so as to avoid the opening region 51a. And the hole 10a may be formed in the location corresponding to the opening area | region 51a of the input member 10. FIG. According to this configuration, the hole 10a can be formed without using a punching die or the like.

In addition, after the base sheet forming step or after any step after the base sheet forming step, the fifth ink material is printed in a region surrounding the opening region 51a and has a characteristic of becoming harder than the base sheet portion 51 after curing. An opening end that surrounds the hole 10a of the input member 10 and includes a reinforcing portion forming step of forming the reinforcing portion 30 that is formed by forming the fifth coating film 45 and curing the fifth coating film 45 by applying heat. The reinforcing part 30 may be formed along the part. According to this structure, the reinforcement part 30 can be formed by printing and thermosetting.

Further, in the base sheet forming step, the first coating film 41 is formed so as to provide the opening region 51a at a predetermined location, and in the receiving portion forming step, the fourth coating film 44 is formed so as to avoid the opening region 51a. In the cover sheet forming step, the third coating film 43 may be formed so as to avoid the opening region 51a, and the hole 10a may be formed at a location corresponding to the opening region 51a of the input member 10. . According to this configuration, the hole 10a can be formed without using a punching die or the like.

Further, in the receiving portion forming step, the fourth coating film 44 is formed in a region surrounding the opening region 51a to form the reinforcing portion 30 along the opening end portion surrounding the hole portion 10a of the input member 10. May be. According to this structure, the reinforcement part 30 can be formed by printing and thermosetting.

Moreover, the manufacturing method of the input device 2 of the first modified example is a sixth coating film which is mainly composed of a thermosetting polyester resin having an isocyanate compound as a crosslinking agent and is colored throughout the interior of the hole 10a. A light-emitting portion forming step of forming a light-emitting portion 56 having a color different from that of the base sheet portion 51 by printing the sixth ink material for forming 46 and curing the sixth coating film 46; According to this structure, the illumination part 56 can be formed by printing and thermosetting. The sixth ink material is not limited to one color, and a plurality of types may be separately printed so that different colors are applied to the plurality of illumination units 56.

As described above, the input devices 1 and 2 and the manufacturing method thereof according to the embodiment of the present invention have been specifically described. However, the present invention is not limited to the above-described embodiment and is within a range not departing from the gist. Various modifications can be made. For example, the present invention can be modified as follows, and these also belong to the technical scope of the present invention.

(1) In the present embodiment, the conductive pattern 15 of the input member 10 has a single-layer configuration, but a multilayer configuration in which a plurality of conductive patterns are stacked may be used. In this case, electrical insulation between the multilayers is performed by laminating the first thermosetting resin 11 between the layers. In addition, electrical conduction between the multilayers is performed through the holes of the first thermosetting resin 11 laminated between the layers.

(2) In the present embodiment, the input member 10 has the hole 10a and the reinforcing portion 30 is provided, but a configuration without the hole 10a may be used. Moreover, even if it has the hole 10a of the input member 10, you may make it the structure which does not provide the reinforcement part 30. FIG. For example, if it forms so that the corner | angular part of the hole 10a may be rounded, even if it extends the input member 10 according to a shape, it can be set as a thing which a crack does not produce easily. Further, even if the corners of the hole 10a are not rounded, it is effective to simply form a hole having a polygonal shape (such as a regular hexagon) whose corners are 90 degrees or more. In addition, even if it is a structure without the hole 10a, you may provide the reinforcement part 30 as needed.

(3) In the manufacturing method of the present embodiment, it has been described that printing / thermosetting is performed once in each step. However, in order to obtain a desired thickness, printing / thermosetting is repeatedly performed a plurality of times. It may be. If you try to print thickly at one time, the surface smoothness will deteriorate and defects such as wrinkles will easily occur, but printing and heat curing in multiple steps will increase the thickness in each process. The quality can be made good.

(4) In order to improve smoothness, a smoothing process using a jig such as a metal roller may be added. For example, the smoothness of the surface of the base sheet 51 is improved by pressing a metal roller against one surface of the base sheet 51 that has been printed and thermoset, and the fine pitch of the conductive pattern 15 is facilitated.

(5) In the manufacturing method of the present embodiment, the order of steps may be changed within a reasonable range. For example, the reinforcing part 30 may be formed first, or the reinforcing part 30 may be formed after the cover sheet forming step for forming the cover sheet part 52.

DESCRIPTION OF SYMBOLS 1, 2 Input device 10 Input member 10a Hole part 11 1st thermosetting resin 12 2nd thermosetting resin 13 3rd thermosetting resin 15 Conductive pattern 15a 1st electrode part 15b 2nd electrode part DESCRIPTION OF SYMBOLS 20 Connection part 21 Receiving part 30 Reinforcement part 41 1st coating film 42 2nd coating film 43 3rd coating film 44 4th coating film 45 5th coating film 46 6th coating film 50 Release sheet 51 Base Sheet part 51a Opening area 52 Cover sheet part 56 Illumination part 60 Flexible wiring board 61 Thermocompression bonding jig 80 Base member 81 Illumination member

Claims (15)

An input device that can be integrally disposed along a surface of a base member having a three-dimensional shape,
Equipped with a sheet-like input member that can be input,
The input member has a sheet-like first thermosetting resin having flexibility, extensibility, and insulation, and a conductive pattern having flexibility, extensibility, and conductivity. Input device. 2. The input device according to claim 1, wherein the input member has a thickness dimension of approximately 100 μm and an elongation rate of 200% or more. The input member includes a connection portion for electrically connecting the conductive pattern to the outside,
The connection portion includes a second thermosetting resin that is harder than the first thermosetting resin, and a part of the conductive pattern includes the first thermosetting resin and the second heat curing resin. The input device according to claim 1, wherein the input device is exposed from a curable resin. A hole is arranged in the input member,
The input device according to any one of claims 1 to 3, further comprising a reinforcing portion made of a material harder than the first thermosetting resin along an opening end portion surrounding the hole portion. A hole is arranged in the input member,
The first thermosetting resin has optical transparency,
4. The method according to claim 1, wherein the hole has a third thermosetting resin having a color different from that of the first thermosetting resin and having flexibility and extensibility. The input device according to the above. The conductive pattern includes a first electrode portion and a second electrode portion that is insulated from the first electrode portion,
6. The input according to claim 1, wherein a change in capacitance generated between the first electrode portion and the second electrode portion can be detected. apparatus. 7. The input device according to claim 1, wherein the first thermosetting resin is a polyester-based high molecular polymer having isocyanate as a cross-linking agent. In the manufacturing method of the input device in which the sheet-like input member capable of input operation is integrally disposed along the surface of the base member,
A first ink material mainly composed of a thermosetting polyester resin having an isocyanate compound as a crosslinking agent is printed to form a first coating film in a predetermined shape, and heat is applied to the first coating film. A base sheet forming step of forming a base sheet portion to be cured and constituting the input member;
A second coating film is formed by printing a second ink material containing a conductive material and having as a main component a thermosetting polyester resin having an isocyanate compound as a cross-linking agent in a predetermined shape on one surface of the base sheet portion. Forming a conductive pattern by curing the second coating film, and,
A third coating film is formed by printing a third ink material made of the same component as the first ink material on the one surface side of the base sheet portion on which the conductive pattern is formed, and the third coating film is formed on the third coating film. A cover sheet forming step of forming a cover sheet portion constituting the input member by applying heat and curing; and
A three-dimensional process in which the input member is integrally disposed by extending the input member into a three-dimensional shape along the surface of the base member;
The manufacturing method of the input device characterized by the above-mentioned. Between the base sheet forming step and the conductive pattern forming step, a fourth ink material is printed on a part of the one surface of the base sheet portion, and has a characteristic of becoming harder than the base sheet portion after curing. Forming a fourth coating film, and having a receiving part forming step of forming a receiving part cured by applying heat to the fourth coating film;
In the conductive pattern forming step, the second ink material is printed on the base sheet portion and the receiving portion,
In the cover sheet forming step, the third ink material is printed in a predetermined shape avoiding a part of the conductive pattern formed on the receiving portion to form the third coating film, 9. The third coating film is cured by applying heat to form the cover sheet portion, and a connection portion in which a part of the conductive pattern is exposed is formed in the region of the receiving portion. A method for manufacturing the input device according to 1. In the base sheet forming step, the first coating film is formed so as to provide an opening region at a predetermined location,
In the cover sheet forming step, forming the third coating film so as to avoid the opening region,
The method for manufacturing an input device according to claim 8, wherein a hole is formed at a location corresponding to the opening region of the input member. After the base sheet forming step or after any one of the steps after the base sheet forming step, the fifth ink material is printed in a region surrounding the opening region and has a characteristic of becoming harder than the base sheet portion after curing. Forming a fifth coating film, and having a reinforcing part forming step of forming a reinforcing part cured by applying heat to the fifth coating film;
The method of manufacturing an input device according to claim 10, wherein the reinforcing portion is formed along an opening end portion surrounding the hole portion of the input member. In the base sheet forming step, the first coating film is formed so as to provide an opening region at a predetermined location,
In the receiving portion forming step, the fourth coating film is formed so as to avoid the opening region,
In the cover sheet forming step, forming the third coating film so as to avoid the opening region,
The method for manufacturing an input device according to claim 9, wherein a hole is formed at a location corresponding to the opening region of the input member. In the receiving portion forming step, the fourth coating film is formed in a region surrounding the opening region,
The method of manufacturing an input device according to claim 12, wherein a reinforcing portion is formed along an opening end portion surrounding the hole portion of the input member. A sixth ink material is formed on the entire interior of the hole to form a sixth coated film that is mainly composed of a thermosetting polyester resin having an isocyanate compound as a crosslinking agent and is colored, The method of manufacturing an input device according to claim 10, further comprising: an illumination part forming step of curing the coating film to form an illumination part having a color different from that of the base sheet part. In the base sheet forming step, a release sheet on which the first ink material is printed,
The method of manufacturing an input device according to claim 8, wherein the release sheet has a printing surface with a surface tension of approximately 30 mN / m or less.

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