JP2011253237A - Touch panel and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch panel capable of preventing an occurrence of exfoliation between a first substrate and a second substrate; and to provide a method of manufacturing the same.SOLUTION: This touch panel includes: a first substrate 21 which has a film-like first transparent substrate main body 31 and a first transparent resistance film 32 provided on a resistance film forming surface 31B of the first transparent substrate main body 31; a second substrate 22 which has a second transparent substrate main body 41 disposed facing the first substrate 21 and a second transparent resistance film 42 disposed on the upper face 41A of the second transparent substrate main body 41 and facing the first transparent resistance film 32; and a bonding member 25 disposed between the outer periphery of the first substrate 21 and the outer periphery of the second substrate 22 and bonding the first substrate 21 to the second substrate 22. A recessed/projecting portion 37 in contact with the bonding member 25 is provided at the outer periphery of the first substrate 21.

Description

  The present invention relates to a touch panel and a method for manufacturing the touch panel, and in particular, a touch panel including first and second substrates arranged opposite to each other, and an adhesive member that bonds outer peripheral portions of the first and second substrates, and the manufacturing thereof. Regarding the method.

  FIG. 1 is a plan view of a conventional touch panel. 2 is a cross-sectional view in the JJ line direction of the touch panel shown in FIG. 1, and FIG. 3 is a cross-sectional view in the KK line direction of the touch panel shown in FIG. 1 to 3, as a conventional touch panel 200, a five-wire resistive touch panel is illustrated as an example. In FIG. 1, L is an area where the touch panel 200 is operated (hereinafter referred to as “operation area L”), and M and N are widths of the adhesive member arrangement area where the adhesive member 205 is arranged (hereinafter referred to as “adhesive member arrangement area”). Width M, N "). 2 and 3, the same components as those of the conventional touch panel 200 shown in FIG.

  Referring to FIGS. 1 to 3, a conventional touch panel 200 includes a first substrate 201, a second substrate 202, a flexible wiring substrate 203, and an adhesive member 205.

  The first substrate 201 has a film shape, and includes a transparent substrate body 211 having an operation surface 211A, a transparent resistance film 212, and a coordinate detection electrode 213.

  The transparent resistance film 212 is provided on the resistance film forming surface 211B of the transparent substrate body 211 located on the opposite side of the operation surface 211A.

  The coordinate detection electrode 213 is provided on the lower surface 212 </ b> A of the transparent resistance film 212 at a portion located outside the operation region L.

  The second substrate 202 includes a transparent substrate body 221, a transparent resistance film 222, and an electrode 224. As the transparent substrate main body 221, for example, a glass substrate can be used. The transparent resistance film 222 is provided on the upper surface 221A of the transparent substrate body 221.

  The electrode 224 has a frame shape in plan view. The electrode 224 is provided on the upper surface 222 </ b> A of the transparent resistance film 222 at a portion disposed outside the operation region L.

  The second substrate 202 having the above-described configuration is disposed so that the transparent resistance film 212 and the transparent resistance film 222 provided on the first substrate 201 face each other.

  The flexible wiring substrate 203 is provided between the first substrate 201 and the second substrate 202. The flexible wiring substrate 203 is electrically connected to the first and second substrates 201 and 202.

  The adhesive member 205 is disposed on the outer peripheral portions of the first and second substrates 201 and 202 (in other words, the first and second substrates 201 and 202 in the portion located outside the operation region L). The adhesive member 205 includes an outer peripheral portion of the first substrate 201 (specifically, the transparent resistance film 212 and the coordinate detection electrode 213 disposed on the outer peripheral portion of the first substrate 201) and the second substrate 202. The first substrate 201 and the second substrate 202 are bonded to each other by contacting the outer peripheral portion (specifically, the transparent resistance film 222 and the electrode 224 disposed on the outer peripheral portion of the second substrate 202). (For example, refer to Patent Document 1).

JP 2003-196025 A

  However, the widths M and N of the adhesive member arrangement region shown in FIG. As described above, when the widths M and N of the adhesive member arrangement region are narrowed, the contact area between the adhesive member 205 and the first and second substrates 201 and 202 becomes small. There is a problem in that the adhesive strength between the second substrate 202 is lowered and peeling occurs between the first substrate 201 and the second substrate 202.

  In particular, when the touch panel 200 is mounted on a vehicle having a severe environment, the above problem becomes significant.

  Then, this invention is made | formed in view of said point, and it aims at providing the touchscreen which can prevent peeling between a 1st board | substrate and a 2nd board | substrate, and its manufacturing method. To do.

According to one aspect of the present invention, a first transparent substrate body having an operation surface and in the form of a film, and a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface A first substrate having a first transparent resistance film provided;
A second transparent substrate body disposed to face the first substrate; and a second transparent resistance film disposed on an upper surface of the second transparent substrate body and opposed to the first transparent resistance film. And a second substrate having
A touch panel comprising: an adhesive member that is disposed between an outer peripheral portion of the first substrate and an outer peripheral portion of the second substrate, and that bonds the first substrate and the second substrate. ,
A touch panel is provided in which irregularities in contact with the adhesive member are provided on an outer peripheral portion of the first substrate.

  According to the present invention, by providing unevenness in contact with the adhesive member on the outer peripheral portion of the first substrate, the width of the adhesive member arrangement region in which the adhesive member is arranged (in other words, the touch panel is narrowed) In this state, the contact area between the outer peripheral portion of the first substrate and the adhesive member can be increased. Thereby, since the adhesive strength between a 1st board | substrate and an adhesive member improves, it can prevent that a 1st board | substrate peels from a 2nd board | substrate.

According to another aspect of the present invention, a first transparent substrate body having an operation surface and having a film shape, and a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface A first substrate forming step of forming a first substrate having a first transparent resistance film provided on the substrate;
A second transparent substrate body, and a second transparent resistance film provided on the upper surface of the second transparent substrate body and arranged to face the first transparent resistance film. A second substrate forming step of forming a substrate;
An adhering step of adhering the first substrate and the second substrate by disposing an adhesive member between the outer peripheral portion of the first substrate and the outer peripheral portion of the second substrate; A touch panel manufacturing method comprising:
The first substrate forming step includes pressing the resistance film forming surface of the first transparent substrate body at a portion located on the outer peripheral portion of the first substrate, thereby forming an outer peripheral portion of the first substrate. An irregularity forming step of forming irregularities in the first transparent substrate body of the portion located;
After the unevenness forming step, the first transparent resistance film is formed by forming a film as a base material of the first transparent resistance film on the resistance film forming surface of the first transparent substrate body. A first transparent resistance film forming step,
In the first transparent resistance film forming step, the film is formed so that the unevenness is transferred to a portion of the film formed on the outer peripheral portion of the first substrate. A manufacturing method is provided.

  According to the present invention, the first substrate forming step includes pressing the resistance film forming surface of the first transparent substrate main body at a portion located on the outer peripheral portion of the first substrate, thereby forming the outer periphery of the first substrate. Forming a concavo-convex portion on the first transparent substrate body in the portion located in the portion, and then forming a film serving as a base material of the first transparent resistance film on the resistance film forming surface of the first transparent substrate body. A first transparent resistance film forming step of forming a first transparent resistance film by forming a film, and in the first transparent resistance film forming step, a portion formed on the outer peripheral portion of the first substrate The contact area between the outer peripheral portion of the first substrate and the adhesive member is increased by forming a film that becomes a base material of the first transparent resistance film so that the unevenness is transferred to the film. Is possible. Thereby, since the adhesive strength between a 1st board | substrate and an adhesive member improves, it can prevent that a 1st board | substrate peels from a 2nd board | substrate.

According to another aspect of the present invention, a first transparent substrate body having an operation surface and having a film shape, and a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface A first transparent resistance film provided on the first substrate,
A second transparent substrate body disposed to face the first substrate; and a second transparent resistance film disposed on an upper surface of the second transparent substrate body and opposed to the first transparent resistance film. And a second substrate having
A touch panel comprising: an adhesive member that is disposed between an outer peripheral portion of the first substrate and an outer peripheral portion of the second substrate, and that bonds the first substrate and the second substrate. ,
A touch panel is provided in which irregularities in contact with the adhesive member are provided on an outer peripheral portion of the second substrate.

  According to the present invention, the unevenness contacting the adhesive member is provided on the outer peripheral portion of the second substrate, so that the width of the adhesive member arrangement region where the adhesive member is arranged is widened (in other words, the touch panel is narrowed) In this state, the contact area between the outer peripheral portion of the second substrate and the adhesive member can be increased. Thereby, since the adhesive strength between the 2nd board | substrate and an adhesive member improves, it can prevent that a 2nd board | substrate peels from a 1st board | substrate.

According to another aspect of the present invention, a first transparent substrate body having an operation surface and having a film shape, and a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface A first substrate forming step of forming a first substrate having a first transparent resistance film provided on the substrate;
A second transparent substrate body, and a second transparent resistance film provided on the upper surface of the second transparent substrate body and arranged to face the first transparent resistance film. A second substrate forming step of forming a substrate;
An adhering step of adhering the first substrate and the second substrate by disposing an adhesive member between the outer peripheral portion of the first substrate and the outer peripheral portion of the second substrate; A touch panel manufacturing method comprising:
The second substrate forming step includes an electrode forming step of forming an electrode on the upper surface of the second transparent resistance film in a portion located on the outer peripheral portion of the second substrate;
After preparing a mixture in which a plurality of spherical fillers and a resin are mixed, by printing the mixture on the upper surface of the electrode by a printing method, the unevenness having unevenness on the portion that contacts the adhesive member An uneven member forming step for forming a member,
In the uneven member forming step, the plurality of fillers are arranged on the upper surface of the electrode so that the plurality of fillers do not overlap with each other, and the position of the first upper surface of the resin in the portion arranged between the fillers There is provided a method for manufacturing a touch panel, wherein the resin is disposed so that the position is lower than the position of the second upper surface of the resin in a portion disposed on the filler.

  According to the present invention, after preparing a mixture in which a plurality of spherical fillers and a resin are mixed, by printing the mixture on the upper surface of the electrode by a printing method, unevenness is formed in a portion that contacts the adhesive member. The uneven member forming step for forming the uneven member is provided, and in the uneven member forming step, a plurality of fillers are arranged on the upper surface of the electrode so that the fillers do not overlap with each other, and the portion arranged between the fillers By arranging the resin so that the position of the first upper surface of the resin is lower than the position of the second upper surface of the resin disposed on the filler, there is unevenness in the portion in contact with the adhesive member. It becomes possible to form the uneven member. Thereby, the contact between the outer peripheral portion of the second substrate and the adhesive member is performed without increasing the width of the adhesive member arrangement region where the adhesive member is arranged (in other words, in a state where the touch panel is narrowed). Since the area can be increased and the adhesive strength between the second substrate and the adhesive member is improved, it is possible to prevent the second substrate from being peeled from the first substrate.

According to another aspect of the present invention, a first transparent substrate body having an operation surface and having a film shape, and a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface A first transparent resistance film provided on the first substrate,
A second transparent substrate body disposed to face the first substrate; and a second transparent resistance film disposed on an upper surface of the second transparent substrate body and opposed to the first transparent resistance film. And a second substrate having
A touch panel comprising: an adhesive member that is disposed between an outer peripheral portion of the first substrate and an outer peripheral portion of the second substrate, and that bonds the first substrate and the second substrate. ,
The first substrate is provided with first irregularities in contact with the adhesive member on the outer peripheral portion of the first substrate, and the second irregularities in contact with the adhesive member is provided on the outer peripheral portion of the second substrate. A touch panel is provided.

  According to the present invention, the first substrate is provided with the first unevenness on the outer peripheral portion of the first substrate, and the second substrate is provided with the second unevenness on the outer peripheral portion of the second substrate. , Without increasing the width of the adhesive member arrangement region where the adhesive member is arranged (in other words, in a state where the touch panel is narrowed), between the outer peripheral portion of the first and second substrates and the adhesive member It is possible to increase the contact area. Thereby, since the adhesive strength between the 1st and 2nd board | substrate, an adhesive member, and an adhesive member improves, it can prevent that a 1st and 2nd board | substrate peels from an adhesive member.

  According to the present invention, it is possible to prevent peeling between the first substrate and the second substrate.

It is a top view of the conventional touch panel. It is sectional drawing of the JJ line direction of the touch panel shown in FIG. It is sectional drawing of the KK line direction of the touch panel shown in FIG. 1 is a plan view of a touch panel according to a first embodiment of the present invention. It is sectional drawing of the AA line direction of the touch panel shown in FIG. It is sectional drawing of the BB line direction of the touch panel shown in FIG. It is a top view of the 2nd board | substrate shown in FIG. It is a figure (the 1) which shows the manufacturing process of the touchscreen which concerns on the 1st Embodiment of this invention. It is FIG. (2) which shows the manufacturing process of the touchscreen which concerns on the 1st Embodiment of this invention. It is FIG. (The 3) which shows the manufacturing process of the touchscreen which concerns on the 1st Embodiment of this invention. It is FIG. (The 4) which shows the manufacturing process of the touchscreen which concerns on the 1st Embodiment of this invention. It is a figure (the 5) which shows the manufacturing process of the touchscreen which concerns on the 1st Embodiment of this invention. It is FIG. (6) which shows the manufacturing process of the touchscreen which concerns on the 1st Embodiment of this invention. It is FIG. (The 7) which shows the manufacturing process of the touchscreen which concerns on the 1st Embodiment of this invention. It is FIG. (The 8) which shows the manufacturing process of the touchscreen which concerns on the 1st Embodiment of this invention. It is a top view of the touch panel which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the DD line direction of the touch panel shown in FIG. It is sectional drawing of the EE line direction of the touch panel shown in FIG. It is a figure (the 1) which shows the manufacturing process of the touchscreen which concerns on the 2nd Embodiment of this invention. It is a figure (the 2) which shows the manufacturing process of the touchscreen which concerns on the 2nd Embodiment of this invention. It is FIG. (The 3) which shows the manufacturing process of the touchscreen which concerns on the 2nd Embodiment of this invention. It is FIG. (4) which shows the manufacturing process of the touchscreen which concerns on the 2nd Embodiment of this invention. It is FIG. (5) which shows the manufacturing process of the touchscreen which concerns on the 2nd Embodiment of this invention. It is FIG. (6) which shows the manufacturing process of the touchscreen which concerns on the 2nd Embodiment of this invention. It is a top view of the touch panel which concerns on the 3rd Embodiment of this invention. It is sectional drawing of the GG line direction of the touch panel shown in FIG. It is sectional drawing of the HH line direction of the touch panel shown in FIG.

  Next, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 4 is a plan view of the touch panel according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view of the touch panel shown in FIG. 4 in the AA line direction. 6 is a cross-sectional view of the touch panel shown in FIG. 4 in the BB line direction. In FIG. 4, C is an operation area where the touch panel 10 is operated (hereinafter referred to as “operation area C”), the X and X directions are the longitudinal direction of the touch panel 10, and the Y and Y directions are orthogonal to the X and X directions. Each is shown.

  4 to 6, the touch panel 10 according to the first embodiment includes a first substrate 21, a second substrate 22, a flexible wiring substrate 23, and an adhesive 25.

  Referring to FIGS. 5 and 6, the first substrate 21 includes a first transparent substrate body 31, a first transparent resistance film 32, and a coordinate detection electrode 33.

  The first transparent substrate body 31 has a film shape and a rectangular shape. The first transparent substrate body 31 has an operation surface 31A, a resistance film forming surface 31B located on the opposite side of the operation surface 31A, and irregularities 35. The operation surface 31A is a surface of the first transparent substrate body 31 on the side directly touched by a finger or a pen. The resistance film forming surface 31B is a surface of the first transparent substrate main body 31 on the side where the first transparent resistance film 32 is formed.

  The unevenness 35 is a portion of the first transparent substrate in the outer peripheral portion (the outer peripheral portion of the first substrate) of the first transparent substrate body 31 located outside the operation region C that does not face the coordinate detection electrode 33. It is formed on the outer periphery of the main body 31. The unevenness 35 is formed by transferring the shape of the recess 35 to the film that becomes the base material of the first transparent resistance film 32 when the film that becomes the base material of the first transparent resistance film 32 is formed. This is for forming a later-described recess 37 provided in the transparent resistance film 32. The unevenness 35 has a fine shape. The unevenness 35 can be formed by, for example, pressing (pressing) the surface of the mold on which the uneven shape is formed against the outer peripheral portion of the first transparent substrate body 31. The average surface roughness of the first transparent resistance film 32 in the portion where the unevenness 35 is formed can be set to 10 μm, for example.

  As the first transparent substrate body 31, for example, PET (Polyethylene terephthalate), PC (Polycarbonate), and a transparent resin material in the visible region can be used. When the size of the touch panel 10 is 7 inches, the thickness of the first transparent substrate body 31 can be set to 200 μm, for example.

  The first transparent resistance film 32 is provided so as to cover the resistance film forming surface 31 </ b> B of the first transparent substrate body 31. The first transparent resistance film 32 has irregularities 37. The unevenness 37 is the outer peripheral portion of the second substrate 22 in the outer peripheral portion of the first transparent resistive film 32 (specifically, the first transparent resistive film 32 located outside the operation region C). And is formed on the outer peripheral portion of the first transparent resistance film 32 at a portion in contact with the adhesive member 25. The unevenness 37 has a fine shape. The difference in height between the concave and convex portions of the unevenness 37 can be appropriately selected within a range of 1/10 to 1/100 of the thickness value of the adhesive member 25, for example. Specifically, the difference in height between the concave and convex portions of the unevenness 37 can be set to 3 μm to 15 μm, for example.

  As described above, by providing the irregularities 37 on the outer peripheral portion of the first transparent resistance film 32 at the portion in contact with the adhesive member 25, the width of the adhesive member arrangement region in which the adhesive member 25 is arranged is widened (in other words, If the touch panel 10 is narrowed), the contact area between the outer peripheral portion of the first substrate 21 and the adhesive member 25 can be increased. Thereby, since the adhesive strength between the 1st board | substrate 21 and the adhesive member 25 improves, it can prevent that the 1st board | substrate 21 peels from the 2nd board | substrate 22. FIG.

  When the size of the touch panel 10 is 7 inches, for example, an ITO film (indium tin oxide film) can be used as the first transparent resistance film 32. In this case, the thickness of the first transparent resistance film 32 can be set to 200 mm, for example.

  The coordinate detection electrode 33 is disposed on the outer side of the operation region C, and is provided on the lower surface 32B of the first transparent resistance film 32 which is a flat surface. The coordinate detection electrode 33 is an electrode that functions as a probe.

  FIG. 7 is a plan view of the second substrate shown in FIG. In FIG. 7, the same components as those of the second substrate 22 shown in FIG.

  Referring to FIGS. 5 to 7, the second substrate 22 has a rectangular shape, and includes a second transparent substrate body 41, a second transparent resistance film 42, and an electrode 44. The second transparent substrate body 41 is arranged so as to face the first substrate 21. For example, a glass substrate can be used as the second transparent substrate body 41.

  The second transparent resistance film 42 is provided so as to cover the upper surface 41A of the second transparent substrate body 41 that is a flat surface. The second transparent resistance film 42 is disposed so as to face the first transparent resistance film 32. When the size of the touch panel 10 is 7 inches, for example, an ITO film (indium tin oxide film) can be used as the second transparent resistance film 42. In this case, the thickness of the second transparent resistance film 42 can be set to 200 mm, for example.

  The electrode 44 has a frame shape, and is provided on the upper surface 42 </ b> A of the outer peripheral portion of the second transparent resistance film 42 disposed outside the operation region C. The electrode 44 includes power supply units 45 to 48 to which voltages are applied at four corners. The electrode 44 generates a potential distribution extending in the X and X directions and a potential distribution extending in the Y and Y directions by changing a voltage value supplied to the power feeding units 45 to 48. As a material of the electrode 44, for example, a conductive paste (for example, silver / carbon paste) can be used.

  The flexible wiring board 23 is provided between the first board 21 and the second board 22. The flexible wiring board 23 is electrically connected to the coordinate detection electrode 33 and the power feeding units 45 to 48.

  The adhesive member 25 includes an outer peripheral portion of the first substrate 21 (a portion of the first substrate 21 located outside the operation region C) and a second substrate 22 (a portion of the portion located outside the operation region C). Between the outer periphery of the second substrate 22). As a result, the adhesive member 25 bonds the first substrate 21 and the second substrate 22 together. The adhesive member 25 is in contact with the entire surface of the first transparent resistance film 32 on which the unevenness 37 is formed.

  As the adhesive member 25, for example, an adhesive or a double-sided tape can be used. As the adhesive, for example, an acrylic material can be used. Moreover, as a double-sided tape, the double-sided tape which does not have a double-sided tape which uses a film as a base material, and a base material can be used, for example. Moreover, the thickness of the adhesive member 25 can be 30 micrometers-150 micrometers, for example.

  According to the touch panel of the present embodiment, the unevenness 37 is provided on the outer peripheral portion of the first transparent resistance film 32 at the portion in contact with the adhesive member 25, thereby reducing the width of the adhesive member arrangement region where the adhesive member 25 is arranged. Without increasing the width (in other words, with the touch panel 10 narrowed), the contact area between the outer peripheral portion of the first substrate 21 and the adhesive member 25 can be increased. Thereby, since the adhesive strength between the 1st board | substrate 21 and the adhesive member 25 improves, it can prevent that the 1st board | substrate 21 peels from the 2nd board | substrate 22. FIG.

  8-15 is a figure which shows the manufacturing process of the touchscreen which concerns on the 1st Embodiment of this invention. 8 to 15, the same components as those of the touch panel 10 according to the first embodiment are denoted by the same reference numerals. 8 to 13 illustrate the case where the first substrate 21 is manufactured with the first substrate 21 illustrated in FIG. 5 turned upside down.

  With reference to FIGS. 8-15, the manufacturing method of the touch panel 10 of 1st Embodiment is demonstrated.

  First, in the step shown in FIG. 8, a first transparent substrate main body 31 on which the unevenness 35 is not formed is prepared. As the first transparent substrate body 31, for example, PET (Polyethylene terephthalate), PC (Polycarbonate), and a transparent resin material in the visible region can be used. When the size of the touch panel 10 is 7 inches, the thickness of the first transparent substrate body 31 can be set to 200 mm, for example.

  Next, in the process shown in FIG. 9, the upper mold 51 having the concavo-convex 53 on the portion facing the resistance film forming surface 31B where the concavo-convex 35 is formed and the lower mold having the flat substrate mounting surface 52A. A mold 52 is prepared. The irregularities 53 have substantially the same shape as the irregularities 35 described above. The unevenness 53 is for forming the unevenness 35 on the outer peripheral portion of the first transparent substrate body 31.

  Next, in the step shown in FIG. 10, the first transparent shown in FIG. 8 is made so that the operation surface 31A and the substrate placement surface 52A come in contact with the substrate placement surface 52A of the lower mold 52 shown in FIG. A substrate body 31 is disposed. Next, pressing is performed to press the upper mold 51 having the concavo-convex 53 facing the resistance film forming surface 31 </ b> B of the first transparent substrate body 31 against the first transparent substrate body 31 from above the first transparent substrate body 31. Thus, the first transparent substrate body 31 having the irregularities 35 on the outer peripheral portion is formed by transferring the shape of the irregularities 53 to the outer peripheral portion of the first transparent substrate main body 31 (unevenness forming step).

  Next, in the step shown in FIG. 11, the first transparent substrate body 31 having the unevenness 35 is taken out from the upper mold 51 and the lower mold 52 shown in FIG. 10.

  Next, in the step shown in FIG. 12, a film that becomes the base material of the first transparent resistance film 32 is formed on the resistance film forming surface 31 </ b> B of the first transparent substrate body 31, thereby forming the first irregularities 37. 1 transparent resistance film 32 is formed (first transparent resistance film forming step).

  In the first transparent resistance film forming step, the shape of the concavo-convex 35 is transferred to a film formed on the outer peripheral portion of the first transparent substrate body 31 (a film serving as a base material of the first transparent resistance film 32). As described above, the first transparent resistance film 32 having the unevenness 37 is formed by forming a film as a base material of the first transparent resistance film 32.

  The difference in height between the concave and convex portions of the unevenness 37 can be appropriately selected within a range of 1/10 to 1/100 of the thickness value of the adhesive member 25, for example. Specifically, the difference in height between the concave and convex portions of the unevenness 37 can be set to 3 μm to 15 μm, for example.

  For example, an ITO film (indium tin oxide film) can be used as a film serving as a base material of the first transparent resistance film 32. In this case, the first transparent resistance film 32 can be formed by, for example, a sputtering method. When an ITO film is used as the base material of the first transparent resistance film 32, the thickness of the first transparent resistance film 32 can be set to 200 mm, for example.

  Thus, by forming the unevenness 37 in the first transparent resistance film 32 in the portion that comes into contact with the adhesive member 25, the width of the adhesive member arrangement region where the adhesive member 25 is arranged is widened (in other words, Since the contact area between the outer peripheral portion of the first substrate 21 and the adhesive member 25 can be increased (with the touch panel 10 narrowed), the second substrate 22 to the first substrate can be increased. It can prevent that 21 peels.

  Further, the unevenness 35 is formed on the outer peripheral portion of the first transparent substrate body 31, and then the resistance film forming surface 31 </ b> B of the first transparent substrate body 31 on which the unevenness 35 is formed has the first transparent resistance film 32. By forming a film as a base material, the first transparent resistance film 32 having the unevenness 37 on the outer peripheral portion in contact with the adhesive member 25 is formed without damaging the first transparent resistance film 32. be able to.

  Next, in the step shown in FIG. 13, for example, by a printing method (for example, screen printing), a conductive paste (on the lower surface 32B of the first transparent resistance film 32 corresponding to the formation region of the coordinate detection electrode 33 is applied to the lower surface 32B. For example, the coordinate detection electrode 33 is formed by printing silver / carbon paste. The steps shown in FIGS. 8 to 13 correspond to the “first substrate forming step”.

  Next, in the process shown in FIG. 14, the second transparent resistance film 42 is formed on the upper surface 41 </ b> A of the second transparent substrate body 41 by a well-known technique, and then the electrode is formed on the upper surface 42 </ b> A of the second transparent resistance film 42. The second substrate 22 is formed by forming 44 (second substrate forming step).

  For example, a glass substrate is used as the second transparent substrate body 41. As the second transparent resistance film 42, for example, an ITO film (indium tin oxide film) can be used. In this case, the second transparent resistance film 42 can be formed by, for example, a sputtering method. When an ITO film is used as the second transparent resistance film 42, the thickness of the second transparent resistance film 42 can be set to 200 mm, for example.

  The electrode 44 can be formed, for example, by printing a conductive paste (for example, silver / carbon paste) by a printing method (for example, screen printing). The thickness of the electrode 44 can be set to 15 μm, for example.

  Next, in the step shown in FIG. 15, the first transparent resistance film 32 and the second transparent resistance film 42 face each other above the second substrate 22 shown in FIG. The substrate 21 is turned upside down, and the adhesive member 25 is disposed between the outer periphery of the first substrate 21 and the outer periphery of the second substrate 22. The substrate 22 is bonded (bonding step).

  Thereby, the touch panel 10 of 1st Embodiment is manufactured. As the adhesive member 25, for example, an adhesive or a double-sided tape can be used. As the adhesive, for example, an acrylic material can be used. Moreover, as a double-sided tape, the double-sided tape which does not have a double-sided tape which uses a film as a base material, and a base material can be used, for example. The thickness of the adhesive member 25 can be set to, for example, 30 μm to 150 μm.

  According to the manufacturing method of the touch panel of the present embodiment, the width of the adhesive member arrangement region in which the adhesive member 25 is arranged by forming the unevenness 37 on the first transparent resistance film 32 in the portion in contact with the adhesive member 25. The contact area between the outer peripheral portion of the first substrate 21 and the adhesive member 25 can be increased without widening (in other words, with the touch panel 10 narrowed), It is possible to prevent the first substrate 21 from being peeled from the second substrate 22.

  Further, the unevenness 35 is formed on the outer peripheral portion of the first transparent substrate body 31, and then the resistance film forming surface 31 </ b> B of the first transparent substrate body 31 on which the unevenness 35 is formed has the first transparent resistance film 32. By forming a film serving as a base material, unevenness 37 is formed on a portion corresponding to the outer peripheral portion of the first substrate 21 (a portion in contact with the adhesive member 25) without damaging the first transparent resistance film 32. The first transparent resistance film 32 having the above can be formed.

(Second Embodiment)
FIG. 16 is a plan view of a touch panel according to the second embodiment of the present invention. 17 is a cross-sectional view of the touch panel shown in FIG. 16 in the DD line direction. 18 is a cross-sectional view of the touch panel shown in FIG. 16 in the EE line direction. 16 to 18, the same components as those of the touch panel 10 according to the first embodiment are denoted by the same reference numerals.

  Referring to FIGS. 16 to 18, the touch panel 60 of the second embodiment is a first touch panel instead of the first and second substrates 21 and 22 provided in the touch panel 10 of the first embodiment. And it is comprised similarly to the touchscreen 10 except having provided the 2nd board | substrate 61,62.

  The first substrate 61 includes a first transparent substrate main body 65, a first transparent resistance film 66, and a coordinate detection electrode 33.

  The first transparent substrate body 65 has a film shape and a rectangular shape. The first transparent substrate body 65 has an operation surface 65A and a resistance film forming surface 65B located on the opposite side of the operation surface 65A. The operation surface 65A is a surface of the first transparent substrate body 65 on the side directly touched by a finger or a pen. The operation surface 65A is a flat surface. The resistance film forming surface 65B is the surface of the first transparent substrate body 65 on the side where the first transparent resistance film 66 is formed. The resistance film forming surface 65B is a flat surface.

  The first transparent resistance film 66 is provided so as to cover the resistance film forming surface 65 </ b> B of the first transparent substrate body 65. As the first transparent resistance film 66, for example, an ITO film (indium tin oxide film) can be used. In this case, the thickness of the first transparent resistance film 66 can be set to 200 mm, for example.

  The coordinate detection electrode 33 is disposed outside the operation region C, and is provided on the lower surface 66B of the first transparent resistance film 66 that is a flat surface.

  The second substrate 62 has the same configuration as that of the second substrate 22 except that the concavo-convex member 68 is further provided on the components of the second substrate 22 described in the first embodiment.

  The uneven member 68 is provided on the upper surface 44A of the electrode 44 having a frame shape. The uneven member 68 is disposed on the outer periphery of the second substrate 62 on which the adhesive member 25 is disposed. The concavo-convex member 68 includes a plurality of spherical fillers 71 and a resin 72. The plurality of fillers 71 are arranged on the upper surface 44A of the electrode 44 so as not to overlap each other. The particle sizes of the plurality of fillers 71 are configured to be substantially equal. The particle diameter of the filler 71 can be, for example, 10 μm to 30 μm. Moreover, as a material of the filler 71, for example, silica can be used.

  The resin 72 is disposed so as to cover the plurality of fillers 71 and the upper surface 44 </ b> A of the portion of the electrode 44 positioned between the fillers 71. In addition, the position of the first upper surface 72A of the portion of the resin 72 disposed between the fillers 71 is lower than the position of the second upper surface 72B of the portion of the resin 72 disposed on the filler 71. It is configured as follows. As a result, fine irregularities 75 are formed on the irregular member 68 at the portion facing the outer peripheral portion of the first substrate 65. The irregularities 75 face the first substrate 61 and are in contact with the adhesive member 25.

  The height difference F between the first upper surface 72A of the resin 72 and the second upper surface 72B of the resin 72 is, for example, 1/10 to 1/100 of the thickness value (for example, 30 to 150 μm) of the adhesive member 25. It can select suitably within the range. Specifically, the height difference F can be set to 3 μm to 15 μm, for example. As the resin 72, for example, an acrylic resin can be used.

  As described above, the concavo-convex member 68 made of the plurality of fillers 71 and the resin 72 is provided on the upper surface 44A of the electrode 44, and is disposed on the upper surface 44A of the electrode 44 so that the plurality of fillers 71 do not overlap with each other. The resin 72 is disposed so as to cover the upper surface 44A of the electrode 44 in the portion located between 71, and the position of the first upper surface 72A of the resin 72 in the portion disposed between the fillers 71 is disposed on the filler 71. The concave / convex member 68 disposed on the outer peripheral portion of the second substrate 66 has a fine concave / convex contact with the adhesive member 25 by being configured to be lower than the position of the second upper surface 72B of the portion of the resin 72. 75 can be formed.

  Thereby, without increasing the width of the adhesive member arrangement region where the adhesive member 25 is arranged (in other words, in a state where the touch panel 60 is narrowed), the outer peripheral portion of the second substrate 62 and the adhesive member 25 It is possible to increase the contact area between the second substrate 62 and the adhesive strength between the second substrate 62 and the adhesive member 25, so that the second substrate 62 can be prevented from peeling off from the first substrate 61. .

  According to the touch panel of the present embodiment, the concavo-convex member 68 having the concavo-convex 75 on the upper surface 44 </ b> A of the electrode 44 disposed on the outer peripheral portion of the second substrate 62 on the portion facing the outer peripheral portion of the first substrate 61. And by bonding the outer peripheral portion of the first substrate 61 and the outer peripheral portion of the second substrate 62 with the adhesive member 25, the outer peripheral portion of the second substrate 62 on which the adhesive member 25 and the unevenness 75 are formed. Therefore, the second substrate 62 can be prevented from being peeled off from the first substrate 61.

  19 to 24 are diagrams showing a manufacturing process of the touch panel according to the second embodiment of the present invention. 19 to 24, the same components as those of the touch panel 60 of the second embodiment are denoted by the same reference numerals.

  With reference to FIGS. 19-24, the manufacturing method of the touch panel 60 of 2nd Embodiment is demonstrated.

  First, in the step shown in FIG. 19, the first substrate 61 including the first transparent substrate main body 65, the first transparent resistance film 66, and the coordinate detection electrode 33 is formed by a known method. (First substrate forming step).

  As the first transparent substrate body 65, for example, PET (Polyethylene terephthalate), PC (Polycarbonate), and a transparent resin material in the visible region can be used. When the size of the touch panel 60 is 7 inches, the thickness of the first transparent substrate body 65 can be set to 200 μm, for example.

  The first transparent resistance film 66 is formed, for example, by depositing an ITO film (for example, a thickness of 200 mm) on the resistance film forming surface 65B of the first transparent substrate body 65 by sputtering. The coordinate detection electrode 33 is formed, for example, by printing a conductive paste (for example, silver / carbon paste) on the lower surface 66B of the first transparent resistance film 66 by a printing method (for example, screen printing).

  Next, in the step shown in FIG. 20, the second transparent resistance film 42 facing the first transparent resistance film 66 is formed on the upper surface 41 </ b> A of the second transparent substrate body 41. Specifically, the second transparent resistance film 42 is formed, for example, by forming an ITO film (for example, a thickness of 200 mm) on the upper surface 41A of the second transparent substrate body 41 by sputtering.

  Next, in the step shown in FIG. 21, a frame-shaped electrode is formed on the upper surface 42 </ b> A of the second transparent resistance film 42 in the portion disposed on the outer peripheral portion of the second substrate 62 (see FIG. 17) described above. 44 is formed (electrode formation step).

  The electrode 44 is formed, for example, by printing a conductive paste (for example, silver / carbon paste) on the upper surface 42A of the second transparent resistance film 42 by a printing method (for example, screen printing).

  Next, in the step shown in FIG. 22, a mixture 81 is prepared by mixing a plurality of fillers 71 that are spherical and have substantially the same particle diameter, and a resin 72.

  The particle diameter of the filler 71 can be appropriately selected within a range of 10 μm to 30 μm, for example. As the filler 71, for example, silica can be used. In this case, the ratio of the filler 71 contained in the mixture 81 can be 10 wt%-50 wt%, for example. As the resin 72, for example, an acrylic resin can be used.

  Next, in the process shown in FIG. 23, the mixture 81 shown in FIG. 22 is printed on the upper surface 44A of the electrode 44 by a printing method (for example, screen printing), so that the portions 75 in contact with the adhesive member 25 have irregularities 75. The uneven member 68 is formed (uneven member forming step).

  Further, in the concavo-convex member forming step, the plurality of fillers 71 are disposed on the upper surface 44A of the electrode 44 so that the plurality of fillers 71 do not overlap each other, and the first portion of the resin 72 in the portion disposed between the fillers 71 is disposed. The resin 72 is disposed such that the position of the upper surface 72A is lower than the position of the second upper surface 72B of the resin 72 in the portion disposed on the filler 71.

  The height difference F between the first upper surface 72A of the resin 72 and the second upper surface 72B of the resin 72 is, for example, 1/10 to 1/100 of the thickness value (for example, 30 to 150 μm) of the adhesive member 25. It can select suitably within the range. Specifically, the height difference F can be set to 3 μm to 15 μm, for example. As the resin 72, for example, an acrylic resin can be used.

  Next, in the process shown in FIG. 24, the first transparent resistance film 66 and the second transparent resistance film 42 are opposed to the first transparent resistance film 66 and the second transparent resistance film 42 above the second substrate 62 shown in FIG. The first substrate 21 and the second substrate 22 are arranged by arranging the adhesive member 25 between the outer peripheral portion of the first substrate 61 and the outer peripheral portion of the second substrate 62. Are bonded (bonding process).

  Thereby, the touch panel 60 of the second embodiment is manufactured. As the adhesive member 25, for example, an adhesive or a double-sided tape can be used. As the adhesive, for example, an acrylic material can be used. Moreover, as a double-sided tape, the double-sided tape which does not have a double-sided tape which uses a film as a base material, and a base material can be used, for example. The thickness of the adhesive member 25 can be set to, for example, 30 μm to 150 μm.

  According to the manufacturing method of the touch panel of the present embodiment, after preparing a mixture 81 made of silica and mixing a plurality of spherical fillers 71 and a resin 72, the upper surface 44A of the electrode 44 is formed by a printing method. By printing the mixture 81, a concavo-convex member forming step is provided for forming the concavo-convex member 68 having the concavo-convex 75 in the portion in contact with the adhesive member 25. In addition, a plurality of fillers 71 are arranged on the upper surface 44 A of the electrode 44, and the position of the first upper surface 72 A of the portion of the resin 72 disposed between the fillers 71 is the second portion of the resin 72 of the portion disposed on the filler 71. By arranging the resin 72 so as to be lower than the position of the upper surface 72 </ b> B of FIG. It becomes possible.

  Thereby, without increasing the width of the adhesive member arrangement region where the adhesive member 25 is arranged (in other words, in a state where the touch panel 60 is narrowed), the outer peripheral portion of the second substrate 62 and the adhesive member 25 It is possible to increase the contact area between the second substrate 62 and the adhesive strength between the second substrate 62 and the adhesive member 25, so that the second substrate 62 can be prevented from peeling off from the first substrate 61. .

(Third embodiment)
FIG. 25 is a plan view of a touch panel according to the third embodiment of the present invention. 26 is a cross-sectional view of the touch panel shown in FIG. 25 in the GG line direction. 27 is a cross-sectional view of the touch panel shown in FIG. 25 in the HH line direction. In FIGS. 25 to 27, the same components as those of the touch panels 10 and 60 according to the first and second embodiments are denoted by the same reference numerals.

  Referring to FIGS. 25 to 27, the touch panel 90 of the third embodiment is the same as that of the second embodiment, instead of the second substrate 22 provided in the touch panel 10 of the first embodiment. The configuration is the same as that of the touch panel 10 except that the second substrate 62 described is provided.

  In other words, the touch panel 90 is provided on the outer periphery of the first substrate 21 and the outer surface of the second substrate 62 and is in contact with the adhesive member 25. The concave / convex member 68 having the concave / convex 75 (second concave / convex in the present embodiment) is adhered by the adhesive member 25.

  According to the touch panel of the present embodiment, the uneven member 37 having the uneven portion 37 provided on the outer peripheral portion of the first substrate 21 and the uneven portion 75 contacting the adhesive member 25 is provided on the outer peripheral portion of the second substrate 62. An adhesive member in which the adhesive member 25 is disposed by bringing the adhesive member 25 disposed between the outer peripheral portion of the first substrate 21 and the outer peripheral portion of the second substrate 62 into contact with the concavo-convex portions 37 and 75. Without increasing the width of the arrangement region (in other words, with the touch panel 90 narrowed), the contact area between the outer peripheral portions of the first and second substrates 21 and 62 and the adhesive member 25 is increased. It becomes possible to make it. Thereby, since the adhesive strength between the 1st and 2nd board | substrates 21 and 62 and the adhesive member 25 improves, it can prevent that the 1st and 2nd board | substrates 21 and 62 peel from the adhesive member 25. FIG.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and within the scope of the present invention described in the claims, Various modifications and changes are possible.

  For example, the second transparent resistance film 42 disposed on the outer peripheral portion of the second substrate 22 described in the first embodiment may be provided with unevenness in contact with the adhesive member 25. In addition, the second transparent resistance film 42 disposed on the outer peripheral portion of the second substrate 62 described in the second embodiment may be provided with unevenness in contact with the adhesive member 25.

  The present invention can be applied to a touch panel including first and second substrates disposed opposite to each other and an adhesive member that bonds the outer peripheral portions of the first and second substrates.

10, 60, 90 Touch panel 21, 61 First substrate 22, 62 Second substrate 23 Flexible wiring substrate 25 Adhesive 31, 65 First transparent substrate body 31A, 65A Operation surface 31B, 65B Resistance film formation surface 32, 66 First transparent resistance film 32B, 66B Lower surface 33 Coordinate detection electrode 35, 37, 53, 75 Concavity and convexity 41 Second transparent substrate body 41A, 42A, 44A Upper surface 42 Second transparent resistance film 44 Electrode 45-48 Power supply Part 51 Upper mold 52 Lower mold 52A Substrate mounting surface 68 Concavity and convexity member 71 Filler 72 Resin 72A First upper surface 72B Second upper surface C Operation area F Height difference

Claims (14)

A first transparent substrate body having an operation surface and in the form of a film, and a first transparent resistance film provided on a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface And a first substrate having
A second transparent substrate body disposed to face the first substrate; and a second transparent resistance film disposed on an upper surface of the second transparent substrate body and opposed to the first transparent resistance film. And a second substrate having
A touch panel comprising: an adhesive member that is disposed between an outer peripheral portion of the first substrate and an outer peripheral portion of the second substrate, and that bonds the first substrate and the second substrate. ,
A touch panel, wherein the outer peripheral portion of the first substrate is provided with unevenness in contact with the adhesive member.   The touch panel as set forth in claim 1, wherein the unevenness is provided on the first transparent resistance film at a portion in contact with the adhesive member.   Other irregularities for forming the irregularities by forming a film that becomes a base material of the first transparent resistance film on the first transparent substrate main body in a portion corresponding to the irregularity forming region. The touch panel according to claim 2, wherein the touch panel is provided.   The touch panel according to claim 1, wherein the adhesive member is an adhesive or a double-sided tape. A first transparent substrate body having an operation surface and in the form of a film, and a first transparent resistance film provided on a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface A first substrate forming step of forming a first substrate having
A second transparent substrate body, and a second transparent resistance film provided on the upper surface of the second transparent substrate body and arranged to face the first transparent resistance film. A second substrate forming step of forming a substrate;
An adhering step of adhering the first substrate and the second substrate by disposing an adhesive member between the outer peripheral portion of the first substrate and the outer peripheral portion of the second substrate; A touch panel manufacturing method comprising:
The first substrate forming step includes pressing the resistance film forming surface of the first transparent substrate body at a portion located on the outer peripheral portion of the first substrate, thereby forming an outer peripheral portion of the first substrate. An irregularity forming step of forming irregularities in the first transparent substrate body of the portion located;
After the unevenness forming step, the first transparent resistance film is formed by forming a film as a base material of the first transparent resistance film on the resistance film forming surface of the first transparent substrate body. A first transparent resistance film forming step,
In the first transparent resistance film forming step, the film is formed so that the unevenness is transferred to a portion of the film formed on the outer peripheral portion of the first substrate. Production method.   The touch panel manufacturing method according to claim 5, wherein the adhesive member is an adhesive member or a double-sided tape. A first transparent substrate body having an operation surface and in the form of a film, and a first transparent resistance film provided on a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface And a first substrate having
A second transparent substrate body disposed to face the first substrate; and a second transparent resistance film disposed on an upper surface of the second transparent substrate body and opposed to the first transparent resistance film. And a second substrate having
A touch panel comprising: an adhesive member that is disposed between an outer peripheral portion of the first substrate and an outer peripheral portion of the second substrate, and that bonds the first substrate and the second substrate. ,
A touch panel, wherein the outer peripheral portion of the second substrate is provided with unevenness in contact with the adhesive member. The second substrate is disposed on the upper surface of the second transparent resistance film at a portion located on the outer peripheral portion of the second substrate, and has a frame-shaped electrode and irregularities disposed on the upper surface of the electrode. A member, and
The touch panel according to claim 7, wherein the unevenness is formed on the uneven member in a portion facing the outer peripheral portion of the first substrate. The concavo-convex member has a plurality of spherical fillers, a plurality of fillers, and a resin that covers an upper surface of the electrode located between the fillers,
The plurality of fillers are arranged on the upper surface of the electrode so as not to overlap each other,
The position of the 1st upper surface of the said resin of the part arrange | positioned between the said fillers is lower than the position of the 2nd upper surface of the said resin of the part arrange | positioned on the said filler. Touch panel.   The touch panel according to claim 9, wherein the filler material is silica. A first transparent substrate body having an operation surface and in the form of a film, and a first transparent resistance film provided on a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface A first substrate forming step of forming a first substrate having
A second transparent substrate body, and a second transparent resistance film provided on the upper surface of the second transparent substrate body and arranged to face the first transparent resistance film. A second substrate forming step of forming a substrate;
An adhering step of adhering the first substrate and the second substrate by disposing an adhesive member between the outer peripheral portion of the first substrate and the outer peripheral portion of the second substrate; A touch panel manufacturing method comprising:
The second substrate forming step includes an electrode forming step of forming an electrode on the upper surface of the second transparent resistance film in a portion located on the outer peripheral portion of the second substrate;
After preparing a mixture in which a plurality of spherical fillers and a resin are mixed, by printing the mixture on the upper surface of the electrode by a printing method, the unevenness having unevenness on the portion that contacts the adhesive member An uneven member forming step for forming a member,
In the uneven member forming step, the plurality of fillers are arranged on the upper surface of the electrode so that the plurality of fillers do not overlap with each other, and the position of the first upper surface of the resin in the portion arranged between the fillers The method for manufacturing a touch panel is characterized in that the resin is disposed so that the position is lower than the position of the second upper surface of the resin in the portion disposed on the filler.   The method for manufacturing a touch panel according to claim 11, wherein the filler material is silica. A first transparent substrate body having an operation surface and in the form of a film, and a first transparent resistance film provided on a resistance film forming surface of the first transparent substrate body located on the opposite side of the operation surface And a first substrate having
A second transparent substrate body disposed to face the first substrate; and a second transparent resistance film disposed on an upper surface of the second transparent substrate body and opposed to the first transparent resistance film. And a second substrate having
A touch panel comprising: an adhesive member that is disposed between an outer peripheral portion of the first substrate and an outer peripheral portion of the second substrate, and that bonds the first substrate and the second substrate. ,
The first substrate is provided with first irregularities in contact with the adhesive member on the outer peripheral portion of the first substrate, and the second irregularities in contact with the adhesive member is provided on the outer peripheral portion of the second substrate. Touch panel. The first unevenness is formed on the first transparent resistance film in a portion in contact with the adhesive member,
The second substrate is provided on the upper surface of the second transparent resistance film in a portion located on the outer peripheral portion of the second substrate, and has a frame-shaped electrode and unevenness disposed on the upper surface of the electrode. A member, and
The touch panel according to claim 13, wherein the second unevenness is formed on the uneven member in a portion in contact with the contact member.

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