KR100990773B1 - Film for inmold and method of manufacturing intermediate for touch panel - Google Patents

Abstract

The present invention provides an in-mold film capable of reducing the manufacturing cost of an intermediate for touch panels that can improve visibility.

The resin base film 132 and the transparent conductive film 12 formed in the back surface 132b of the base film 132 are comprised, and the cavity for in-molding molding in the state inserted in the metal mold for in-molding molding. The transparent conductive film 12 can be attached to one surface of the substrate of the touch panel intermediate formed by resin injection into the substrate. A stripe-shaped recess is formed on the surface 132a of the base film 132. 142 and the convex part 143 of stripe shape are formed in the uneven | corrugated part 141 comprised by the alternately installed side by side.

Description

FILM FOR INMOLD AND METHOD OF MANUFACTURING INTERMEDIATE FOR TOUCH PANEL}

This invention manufactures the intermediate | mold for touch panels which manufactures the intermediate | mold for touch panels by inserting the in-mold film provided with the resin base film, the transparent conductive film formed in the one surface of the base film, and this in-mold film in a mold for in-mold. It is about a method.

The in-mold mold disclosed in Unexamined-Japanese-Patent No. 2004-152221 is known as an in-mold mold which can manufacture the touch panel intermediate by in-mold molding. This in-mold metal mold | die is comprised so that a touch panel board | substrate can be manufactured by in-molding with a movable metal mold | die and a fixed metal mold | die. In this in-mold metal mold | die, both metal mold | die are joined in the state which inserted the transfer film (in-mold film) in the cavity, and a resin material is injected from the gate to the cavity of that state. As a result, the touch panel substrate is molded, and the transparent electrode film (transparent conductive film) of the in-mold film is transferred (adhered) to the touch panel substrate.

In this case, the touch panel substrate manufactured by said in-mold metal mold | die is used for a resistive touch panel, for example. Specifically, a pair of touch panel substrates are provided side by side with a transparent conductive film facing each other with a dot spacer interposed therebetween, and a resistive touch panel is produced by joining edge portions of both touch panel substrates in that state. In this type of resistive touch panel, when a touch operation is performed on one surface of both touch panel substrates with a stylus pen or the like, the touch-operated portion contacts the other touch panel substrate, and the resistance value at that time is This changes. For this reason, it is possible to function this touch panel as an operation part by detecting a change of this resistance value and specifying a touch position.

[Patent Document 1]

Japanese Laid-Open Patent Publication No. 2004-152221 (page 3-4, Fig. 1)

By the way, the said in-mold metal mold | die has the following problems. That is, in the resistive touch panel using the touch panel substrate molded by the in-mold mold, since the touch-operated part is slightly dent than the other part, a Newton ring is generated on the pit part and displayed inside. There exists a problem that the visibility of an image falls. As a technique capable of solving this problem, for example, as in the transparent composite material disclosed in Japanese Patent Laid-Open No. 2005-18726, minute peaks having a triangular cross section and a height of about 0.1 μm to 10 μm (stripe-shaped uneven parts) ) Is formed on a transparent conductive film to produce fine interference fringes (Newton rings), whereby a configuration is proposed that does not affect the recognition of the image. In this case, when manufacturing this kind of transparent composite material with the above in-mold mold, generally, fine striped irregularities are provided on the molding surface (cavity surface) of the in-mold mold, and the uneven shape is applied to the transparent conductive film. It traces (embosses) and forms in a transparent conductive film. However, there is a problem in that the manufacturing cost of the in-mold mold rises and it is difficult to reduce the manufacturing cost because an extremely high technique is required to precisely form minute uneven portions on the molding surface of the in-mold mold.

This invention is made | formed in view of such a problem, Comprising: It aims at providing the in-mold film and the manufacturing method of the touchscreen intermediate which can reduce the manufacturing cost of the touchscreen intermediate which can improve visibility.

In order to achieve the above object, the in-mold film according to the present invention comprises a resin base film and a transparent conductive film formed on one surface of the base film, and the in-mold in the state sandwiched in a mold for in-mold molding. An in-mold film in which the transparent conductive film is attached to one surface of a substrate of the touch panel intermediate formed by resin injection into a cavity for forming a mold. A stripe is formed on the other side of the base film and at least one of the transparent conductive film. Concave-convex portions formed by alternately arranged concave portions and stripe-shaped convex portions are formed.

In this case, the formation pitch of the said recessed parts adjacent to the said uneven part, and the formation pitch of the said convex parts adjacent to each other can be prescribed | regulated as the same pitch, respectively.

Moreover, the said uneven part can be formed in the other surface of the said base film.

In addition, in the method for manufacturing an intermediate for touch panels according to the present invention, a resin is injected into a cavity of an in-molding mold in a state in which a film for in-molding in-molding in which a transparent conductive film is formed on one surface of a resin base film is inserted. A method for manufacturing an intermediate for touch panels, in which a substrate of an intermediate for molding is molded and the transparent conductive film is pasted on one surface of the substrate to manufacture the intermediate for a touch panel, wherein stripe recesses and stripe convex portions are alternately arranged side by side. The in-mold film formed on the other surface of the base film and at least one side of the transparent conductive film is inserted into the in-mold molding die to manufacture the intermediate for the touch panel.

In addition, in the method for manufacturing an intermediate for touch panels according to the present invention, a resin is injected into a cavity of a mold for in-mold in a state in which a film for in-molding in-molding having a transparent conductive film formed on one surface of a resin base film is touched. A method for manufacturing an intermediate for a touch panel which forms a substrate of a panel intermediate and attaches the transparent conductive film to one surface of the substrate to manufacture the intermediate for a touch panel, wherein the striped concave and the striped convex are alternately side by side. The concave-convex transfer film is formed in a state in which a concave-convex transfer film formed on at least one of the one surface and the other surface is provided between the cavity surface for forming the one surface of the substrate in the cavity and the in-mold film. The film and the in-mold film are sandwiched in the in-mold molding die and the touch To produce an intermediate neolyong.

According to the method for producing an in-mold film and an intermediate for a touch panel according to the present invention, a concave-convex portion formed by alternately installing stripe-shaped concave portions and stripe-shaped convex portions is formed on the other side of the base film and at least one of the transparent conductive film. In-mold molding using the in-mold film and the mold for in-mold molding which does not form fine concavo-convex portions on the cavity surface by manufacturing the intermediate for touch panel using the in-mold film provided with the base film. By this, an uneven part can be formed in the transparent conductive film of the intermediate body for touch panels. For this reason, compared with the conventional manufacturing method which manufactures the intermediate part for touch panels using the in-mold metal mold | die which formed the fine uneven | corrugated part in the cavity surface, the manufacturing cost of the in-molding metal mold | die is so much that the formation of the uneven | corrugated part to cavity surface is unnecessary. Can be sufficiently reduced. Therefore, according to this in-mold film and the intermediate method for touch panels, the manufacturing cost of the intermediate | middle for touch panels and a touch panel can fully be reduced so that the manufacturing cost of an in-molding metal mold | die can be reduced.

Moreover, according to the in-mold film which concerns on this invention, the formation pitch of each recessed part and the formation pitch of adjacent convex parts in an uneven part are prescribed | regulated by the same pitch, respectively, and the formation pitch of each recessed part is equal to each other. In addition, the concave-convex portions having the same pitches as the convex portions can be formed in the transparent conductive film. For this reason, the situation which causes discomfort to a user that a concave part and a convex part appear, for example, in a random shape because of such a formation pitch can be reliably avoided.

Moreover, according to the in-mold film which concerns on this invention, since one surface of a base film can be formed in a flat state by forming an uneven part in the other surface of a base film, by apply | coating a transparent electrode material to one surface of a base film, A transparent conductive film with a uniform thickness can be efficiently formed. For this reason, the intermediate for touch panels with a uniform thickness of a transparent conductive film can be manufactured.

In addition, according to the method for manufacturing an intermediate for a touch panel according to the present invention, the concave-convex transfer film having the concave-convex portion formed by alternately installing the concave portion of the stripe shape and the convex portion of the stripe shape is formed on at least one of one surface and the other surface thereof. In-mold using this uneven-shaped transfer film, in-mold in-mold film for in-mold molding, and in-mold molding die which does not form minute uneven parts in the cavity surface by manufacturing an intermediate for touch panels By shaping | molding, an uneven part can be formed in the transparent conductive film of the intermediate body for touch panels. For this reason, compared with the conventional manufacturing method which manufactures the intermediate part for touch panels using the in-mold metal mold | die which formed the fine uneven | corrugated part in the cavity surface, the manufacture of the in-molding metal mold | die is produced as much as the formation of the uneven | corrugated part to cavity surface is unnecessary. The cost can be reduced sufficiently. Therefore, according to this touch panel intermediate manufacturing method, as much as manufacturing cost of an in-molding metal mold | die can be reduced, manufacturing cost of a touch panel intermediate and a touch panel can fully be reduced.

EMBODIMENT OF THE INVENTION Hereinafter, the best form of the in-mold metal mold | die, the manufacturing method of the intermediates for touch panels, the intermediates for touch panels, and a touch panel which concerns on this invention is demonstrated with reference to an accompanying drawing.

First, the structure of the touch panel 1 is demonstrated with reference to drawings.

The touch panel 1 shown in FIG. 1 is, for example, a resistive touch panel that is attached to the display surface side of a display device (attached object) such as a liquid crystal display panel and functions as a touch type operation unit, and has a lower electrode 2a. The upper electrode 2b, the plurality of dot spacers 3, and the terminal 4 for connection are provided. The lower electrode 2a corresponds to the touch panel intermediate according to the present invention, is provided with a substrate 11 and a transparent conductive film 12 (see FIG. 2), and has an in-mold mold 102 (to be described later) Hereinafter, it is manufactured by in-mold molding using simply "mold 102".

As shown in FIG. 1, the board | substrate 11 is formed in rectangular plate shape as an example, and has resin (high transparency) with high total light transmittance in the cavity 102a (refer FIG. 5) of the metal mold 102 ( As an example, it is molded by injecting an acrylic resin, polycarbonate, and a special olefin resin such as, for example, Aton (registered trademark). As shown in FIG. 2, when resin is injected into one end face 11c of the substrate 11 from the gate 102c (see FIG. 5) with respect to the cavity 102a of the mold 102. The resulting gate trace 11d is formed. Specifically, as shown in FIG. 2, the gate trace 11d is formed in the site | part located in the outer surface 11b side rather than the inner surface 11a of the board | substrate 11 in end surface 11c.

The transparent conductive film 12 is a thin film having transparency and conductivity and is formed on the in-mold film 131 (see FIG. 5), and is attached to the inner surface 11a of the substrate 11 during in-mold molding ( 2). Moreover, as shown in this figure, the front surface of the transparent conductive film 12 has the surface 132a of the base film 132 of the in-mold film 131 at the time of in-mold molding using the metal mold | die 102 mentioned later. As the shape of the uneven portion 141 (see FIG. 6) formed is transferred (traced), the fine concave portions 22 and the convex portions 23 having a stripe shape facing the front and the inside of the ground alternate in FIG. 2. The concave-convex portion 21 formed side by side is formed. In this case, the structure which forms the uneven part 21 in a part of transparent conductive film 12 can also be employ | adopted.

In this case, as for the uneven part 21, the height (depth: L1) from the bottom part 22a of the recessed part 22 shown to FIG. 2 to the top part 23a of the convex part 23 is 0.5 micrometer or more 3 It is comprised so that it may be in the range of micrometer or less. Moreover, as for the uneven part 21, the formation pitch P1 of the adjacent concave parts 22 and the formation pitch P2 of the adjacent convex parts 23 are the same pitch (for example, 0.05 mm or more 0.4) Pitch within the range of mm or less).

The upper electrode 2b is corresponded to the touch side electrode in this invention, and is comprised including the transparent sheet 31 and the transparent conductive film 32 as shown in FIG. The transparent sheet 31 is formed of resin having a high total light transmittance (for example, PET (polyethylene terephthalate)). In addition, the touch surface (upper surface in this figure) of the transparent sheet 31 is subjected to hard coating processing for preventing damage and antireflection processing for preventing reflection. The transparent conductive film 32 is formed on one surface of the transparent sheet 31 (the lower surface in this drawing) by a material having transparency and conductivity (which will be described later) used for forming the transparent conductive film 12. ) Is formed into a thin film.

The dot spacers 3 are formed of a resin having elasticity and transparency, and are arranged at equal intervals between the upper electrode 2b and the lower electrode 2a as shown in FIGS. 1 and 2, and the upper electrode ( It is sandwiched by 2b) and the lower electrode 2a. In this case, when a touch operation is made to a predetermined portion on the touch surface of the upper electrode 2b and the touch portion is pressed toward the lower electrode 2a, the touch portion contacts the lower electrode 2a.

As shown in FIG. 1, the connecting terminal 4 is attached to the outer peripheral edges of the lower electrode 2a and the upper electrode 2b which are opposed, for example, and the two electrodes 2a and 2b are connected to each other. It is connected to the transparent conductive films 12 and 32. FIG. Moreover, the connection terminal 4 is comprised so that the connector of a connection cable can be inserted, and connects external circuits, such as a control part in an attachment object, and transparent conductive films 12 and 32 via a connection cable.

Next, the structure of the manufacturing apparatus 101 is demonstrated with reference to drawings.

The manufacturing apparatus 101 is comprised including the metal mold | die 102, the in-mold film moving apparatus 103, the injection molding machine 104, and the in-mold film 131, as shown in FIG. The mold 102 is a mold capable of manufacturing the lower electrode 2a of the touch panel 1 by in-molding according to the method for manufacturing an intermediate for touch panels according to the present invention. It comprises a moving side metal mold (lower metal mold | die 121). In addition, the mold 102 moves with the main body 113 of the stationary mold 111 in a state in which the in-mold film 131 that is moved by the in-mold film moving device 103 is inserted (see FIG. 5). The main body 123 of the side mold 121 is configured to be joinable.

As shown in FIG. 3, the stationary mold 111 is provided with a base portion 112 and a main body portion 113. The base part 112 is formed in plate shape, and is comprised so that attachment to the fixed side attachment part (not shown) of the injection molding machine 104 is possible. The main body part 113 is fixed to the base part 112, and as shown in FIG. 5, the state joined to the main body part 123 of the moving side metal mold 121 in the state which inserted the in-mold film 131. In the cavity, the cavity 102a for forming the substrate 11 is formed together with the main body portion 123.

In this case, as shown to FIG. 4, 5, the cavity surface (FIGS. 4, 5) which forms the end surface 11c (refer FIG. 1, 2) of the board | substrate 11 among the cavity surfaces which form the cavity 102a. In the cavity surface 102d), a gate 102c for injecting the resin in the flow state from the injection molding machine 104 which is fed through the sprue 102b into the cavity 102a is provided. Specifically, the gate 102c has an outer surface of the substrate 11 rather than a portion where the in-mold film 131 sandwiched by the body portion 113 and the body portion 123 on the cavity surface 102d is positioned. The film for in-mold as the side of the cavity surface (cavity surface 102e in both drawings) which forms 11b, and along the longitudinal direction (direction toward the inside from the front of the paper surface in FIG. 4) of the cavity surface 102d ( It is formed in the site | part located in the width | variety of 131 (for example, center part in the longitudinal direction of the cavity surface 102d). For this reason, as shown in FIG. 5, the cavity surface 102f (substrate) in which the in-mold film 131 opposes the cavity surface 102e by the pressure of the resin injected from the gate 102c into the cavity 102a. It is pressed against the side of the cavity surface which forms the inner surface 11a of (11).

As shown in FIG. 3, the moving side mold 121 includes a base 122, a main body 123, a spacer block 124, and an eject plate 125. The base part 122 is formed in plate shape, and is comprised so that attachment to the movement side attachment part (not shown) in the injection molding machine 104 is possible. The main body part 123 is fixed to the base part 122 via the spacer block 124, and forms the cavity 102a with the main body part 113 of the fixed side metal mold 111. The eject plate 125 is disposed between the base portion 122 and the main body portion 123, and is moved between the base portion 122 and the main body portion 123 by the injection molding machine 104 to move the eject pins outside the drawing. Protrudes toward the front of the main body 123.

As shown in FIG. 3, the in-mold film moving device 103 is formed for the in-mold by a predetermined length for each in-mold molding (one shot) between the fixed-side mold 111 and the moving-side mold 121. The film 131 is moved.

The in-mold film 131 is an example of the in-mold film according to the present invention, and is composed of a base film 132, a transparent conductive film 12, and an adhesive layer 134 as shown in FIG. 6. The base film 132 is formed of resin (for example, PET or PP (polypropylene)) having moderate flexibility and elasticity with a thickness of about 15 µm to 100 µm. As shown in this figure, the surface 132a of the base film 132 has a triangular cross section, for example, and in this figure, fine concave portions 142 having a stripe shape facing the front and the inside of the sheet, and Convex and convex portions 143 are alternately arranged side by side, the concave-convex portion 141 is formed. Specifically, the uneven portion 141 has a height (depth: L11) from the bottom 142a of the recess 142 to the top 143a of the convex portion 143 of 0.5 µm or more and 3 µm or less. It is configured to be in scope. Moreover, as for the uneven part 141, the formation pitch P11 of the adjacent recessed parts 142, and the formation pitch P12 of the adjacent convex parts 143 are the same pitch (for example, 0.05 mm or more 0.4). Pitch within the range of mm or less). In this case, the uneven part 141 sandwiches the base film 132 between the roller 201 in which the toothed part was formed in the surface, and the roller 202 in which the surface was flat as shown in FIG. The shape of the teeth of 201 is formed by tracing (embossing) the surface 132a of the base film 132.

The transparent conductive film 12 is made of, for example, indium oxide such as tin-doped indium oxide (ITO), and is formed on the back surface 132b of the base film 132 with a peeling layer (not shown) (in the present invention). On one surface of the base film), the thickness is formed in the shape of a thin film having a thickness of about 0.5 μm to 5 μm. As the method for forming the transparent conductive film 12, various methods such as a coating method and a vapor deposition method can be used. In addition, the material constituting the transparent conductive film 12 is not limited to the above-mentioned indium oxide, and fine particles of tin oxide such as antimony-doped tin oxide (ATO) and fluorine-doped tin oxide (FTO), and aluminum-doped zinc oxide Various materials having transparency and conductivity such as fine particles of zinc oxide such as (AZO) and cadmium oxide can be used. The adhesive layer 134 is attached to the substrate 11 by attaching the transparent conductive film 12 to the substrate 11 at the time of in-mold molding, and is formed in a thin film on the surface of the transparent conductive film 12.

In this case, in the in-mold film 131, as described above, the surface of the base film 132 is simply and easily inserted into the base film 132 between the roller 201 and the roller 202. The uneven portion 141 may be formed in the 132a. For this reason, the in-mold film 131 can be manufactured at low cost.

The injection molding machine 104 is configured to include, for example, a fixed side attachment portion, a moving side attachment portion, a clamping mechanism, an injection mechanism, an ejection mechanism (both not shown), and the like.

Next, the process of manufacturing the lower electrode 2a and the touch panel 1 by the manufacturing method of the intermediate body for touch panels which concerns on this invention using the manufacturing apparatus 101 is demonstrated with reference to drawings.

First, as shown in FIG. 3, the stationary side mold 111 and the movable side mold 121 of the metal mold | die 102 are affixed to the stationary side attachment part and the moving side attachment part which are not shown in the injection molding machine 104, respectively. . Next, the adhesion layer 134 is made to face the cavity surface 102e of the fixed side mold 111, and the in-mold film 131 is set in the in-mold film transfer device 103, and the in-mold film movement is performed. Activate the device 103. At this time, the in-mold film moving device 103 moves the in-mold film 131 by a predetermined length between the stationary side die 111 and the moving side die 121 of the die 102. Subsequently, the injection molding machine 104 is operated. At this time, the clamping mechanism of the injection molding machine 104 moves the moving side attaching portion toward the fixed side attaching portion, so that the main body portion 113 and the moving side mold 121 of the fixed side mold 111 are shown in FIG. 5. Main body portions 123 are bonded to each other in a state of sandwiching the in-mold film 131.

Next, the injection mechanism of the injection molding machine 104 presses the resin in a fluid state. At this time, as shown in FIG. 5, the resin pressurized from the injection molding machine 104 passes through the sprue 102b and is injected into the cavity 102a from the gate 102c. In this case, in this mold 102, as shown in this figure, the cavity surface 102e side and the cavity surface 102d side of the cavity surface 102d are located more than the site | part in which the in-mold film 131 is located. The gate 102c is provided in the site | part located in the width | variety of the in-mold film 131 along a longitudinal direction. For this reason, the resin injected from the gate 102c into the cavity 102a is filled in the cavity 102a while pressing the in-mold film 131 toward the cavity surface 102f side. In addition, with the filling of the resin, the adhesive layer 134 of the in-mold film 131 comes into close contact with the resin.

On the other hand, as shown in FIG. 8, the in-mold film 131 pressed to the cavity surface 102f side by injection of resin is the uneven part 141 formed in the surface 132a of the base film 132. As shown in FIG. The top 143a of the convex portion 143 in Esso first abuts on the cavity surface 102f. Then, as the pressure of the resin with respect to the in-mold film 131 increases, as shown in FIG. 9, each convex part 143 which abuts on the cavity surface 102f deform | transforms. At this time, a portion of the transparent conductive film 12 facing the convex portion 143 is directed toward the resin side (cavity surface 102e side) applied from the cavity surface 102f via the convex portion 143. Is pressed toward the resin side, and deforms to protrude to the resin side. On the other hand, a portion of the transparent conductive film 12 that faces the concave portion 142 does not protrude to the resin side because it does not receive reaction force from the cavity surface 102f (or because reaction force is slight). Stays in the state.

Subsequently, when resin is further injected into the cavity 102a and the pressure of the resin to the in-mold film 131 further increases, as shown in FIG. 10, the concave portion 142 and the convex portion of the uneven portion 141 are convex. The convex part 143 deform | transforms until the part 143 becomes the same one surface (it becomes one surface), and is in contact with the cavity surface 102f. At this time, since the site | part which opposes the convex part 143 in the transparent conductive film 12 is pressed further toward the resin side, it deforms so that it may protrude further to the resin side. As a result, as shown in this figure, the uneven part 21 by which the shape of the uneven part 141 was transferred (traced) is formed in the transparent conductive film 12.

Here, in the conventional manufacturing method which manufactures the lower electrode 2a by in-molding using the in-mold film in which the surface of the base film was flat, and the in-mold metal mold | die with the fine unevenness | corrugation part formed in a cavity surface, it is fine in a cavity surface. Since extremely high technology is required to form the uneven portion, the manufacturing cost of the in-mold die increases, which makes it difficult to reduce the manufacturing cost of the lower electrode 2a and the touch panel 1. On the other hand, in the manufacturing method of the intermediate part for touch panels using the in-mold film 131 which concerns on this invention, since the formation of the fine unevenness | corrugation with respect to the cavity surface 102f is unnecessary, the metal mold | die 102 can be manufactured at low cost. . As described above, the in-mold film 131 can also be manufactured at low cost. For this reason, in the manufacturing method of the in-mold film 131 and the intermediate body for touch panels which concerns on this invention, it becomes possible to fully reduce the manufacturing cost of the lower electrode 2a and the touch panel 1.

Subsequently, after the predetermined cooling time has elapsed, the clamping mechanism of the injection molding machine 104 moves the moving side attachment portion in a direction away from the fixed side attachment portion, whereby the fixed side mold 111 and the moving side mold 121 are moved. Is released, and the moving side mold 121 is separated from the fixed side mold 111. At this time, the molded article (that is, the substrate 11) formed by solidifying the resin is separated from the fixed side mold 111 together with the moving side mold 121. Next, the eject mechanism of the injection molding machine 104 moves the eject plate 125 of the moving side mold 121 to the main body 123 side, whereby the eject pins other than the drawings protrude toward the front of the main body 123. The molded substrate 11 is taken out from the moving side mold 121. In this case, since the adhesion layer 134 is in close contact with the substrate 11, the in-mold film 131 is taken out from the moving side mold 121 together with the substrate 11.

Subsequently, the base film 132 of the in-mold film 131 is peeled off from the substrate 11. In this case, since the transparent conductive film 12 is in the state which adhered to the inner surface 11a of the board | substrate 11 by the adhesion layer 134, the base film 132 becomes easy from the transparent conductive film 12. It peels off and the transparent conductive film 12 sticks to the inner surface 11a. Thereby, manufacture of the lower electrode 2a comprised from the board | substrate 11 and the transparent conductive film 12 affixed on the inner surface 11a of the board | substrate 11 is completed.

Next, the upper electrode 2b is manufactured. In this case, first, tin dope indium oxide (ITO) as a material for forming a transparent conductive film is applied to one surface of the transparent sheet 31 formed of PET, for example, so that the transparent conductive film 32 is formed on one surface of the transparent sheet 31. ). Next, the other surface (touch surface) of the transparent sheet 31 is subjected to hard coating processing and antireflection processing. Subsequently, the transparent sheet 31 on which the formation of the transparent conductive film 32 and the above processing are completed is cut into a predetermined size (a size substantially the same as that of the lower electrode 2a). Thereby, manufacture of the upper electrode 2b is completed.

Next, the transparent conductive film 12 of the lower electrode 2a and the transparent conductive film 32 of the upper electrode 2b are opposed to each other so that the dot spacers 3 are inserted into the two electrodes 2a and 2b. The outer peripheral edges of both electrodes 2a and 2b in the state are bonded with an adhesive or the like. Subsequently, the connecting terminal 4 is attached to the outer peripheral edges of both the electrodes 2a and 2b, and the transparent conductive film attached to the inner surface 11a of the substrate 11 at the lower electrode 2a ( 12 and the transparent conductive film 32 of the upper electrode 2b and the connection terminal 4 are connected. As a result, the touch panel 1 is completed.

In this case, in this touch panel 1, as described above, the uneven portion 21 composed of the fine concave portion 22 and the convex portion 23 is formed in the transparent conductive film 12. For this reason, when touch operation is performed with respect to the touch panel 1, by the presence of this uneven part 21, a fine interference pattern is produced in the touch operated part so that it cannot be recognized by a human eye. This avoids the occurrence of large interference fringes that interfere with visibility. Therefore, in this touch panel 1, the image etc. which are displayed inside the touch panel 1 in the state attached to the installation object can be visually recognized clearly enough.

As described above, according to the in-mold film 131 and the touch panel intermediate manufacturing method, the concave-convex portion 141 formed by alternately installing the concave portions 142 and the convex portions 143 of the stripe shape are arranged side by side. The in-mold film which can be manufactured at low cost by forming on the surface 132a of the base film 132 and manufacturing the lower electrode 2a using the in-mold film 131 provided with the base film 132 ( 131 and the uneven part 21 can be formed in the transparent conductive film 12 of the lower electrode 2a by in-molding using the metal mold | die 102 which does not form the fine uneven part in the cavity surface 102f. . For this reason, compared with the conventional manufacturing method which manufactures the lower electrode 2a using the in-mold metal mold | die which formed the fine unevenness | corrugation part in the cavity surface, as much as unnecessary formation of the unevenness | corrugation part with respect to the cavity surface 102f is carried out. ) Production cost can be sufficiently reduced. Therefore, according to this in-mold film 131 and the touch panel intermediate manufacturing method, the manufacturing cost of the lower electrode 2a and the touch panel 1 is sufficiently reduced as much as the manufacturing cost of the metal mold 102 can be reduced. You can.

Moreover, according to this in-mold film 131 and the touch panel intermediate manufacturing method, the base film is formed such that the formation pitches of the concave portions 142 are the same and the formation pitches of the convex portions 143 are the same. The concave-convex portion 141 is formed at 132, and the lower electrode 2a is manufactured using the in-mold film 131 having the base film 132, thereby forming pitches of the concave portions 22. Are the same as each other, and the uneven portions 21 having the same pitches of forming the convex portions 23 can be formed in the transparent conductive film 12. For this reason, it is possible to reliably avoid the situation in which a user feels a discomfort that the recessed part 22 and the convex part 23 appear in a random shape, for example, because of such a formation pitch.

Moreover, according to this in-mold film 131 and the intermediate method for a touch panel, the uneven part 141 is formed in the surface 132a of the base film 132, and is lowered using the in-mold film 131. Since the back surface 132b of the base film 132 can be formed in a flat state by manufacturing the electrode 2a, the transparent conductive film 12 with a uniform thickness is applied by apply | coating the transparent electrode material to the back surface 132b. ) Can be efficiently formed. For this reason, the lower electrode 2a with a uniform thickness of the transparent conductive film 12 can be manufactured.

In addition, this invention is not limited to said structure. For example, although the in-mold film 131 which provided the uneven | corrugated part 141 in the surface 132a (other surface of the base film in this invention) of the base film 132 was demonstrated as an example, it is shown in FIG. Like the in-mold film 231, the surface 132a is formed flat, and the transparent conductive film 12 (adhesive layer 134 and the back surface 132b of the base film 132 (base in the present invention) (Corresponds to the other side of the film)). Moreover, like the in-mold film 331 shown in FIG. 12, the structure which forms the uneven part 141 in both the transparent conductive film 12 and the surface 132a of the base film 132 can also be employ | adopted. In addition, although the rectangular and plate-shaped board | substrate 11 was mentioned about the example which forms the transparent conductive film 12, it is not limited to this, It can apply to the board | substrate 11 of arbitrary shapes.

13 and 14, the lower electrode 2a can also be manufactured using the in-mold film 431 and the uneven-shaped transfer film 531 instead of the in-mold film 131 (this present). Another method for manufacturing an intermediate for a touch panel according to the invention). In this case, as shown in FIG. 13, the in-mold film 431 includes the base film 132 on which the above-mentioned uneven portion 141 is not formed (that is, the surface and the back surface are formed flat) and the transparent conductive film ( 12) and the adhesive layer 134. On the other hand, the uneven transfer film 531 is formed of resin (for example, PET or PP) having moderate flexibility and elasticity with a thickness of about 15 µm to 100 µm. Moreover, the uneven | corrugated part 541 of the same shape as the uneven | corrugated part 141 is formed in the surface 531a (one surface of the uneven | corrugated transfer film in this invention) of the uneven transfer film 531. As shown in FIG. That is, the uneven transfer film 531 is configured similarly to the base film 132 of the in-mold film 131 described above.

When manufacturing the lower electrode 2a using this in-mold film 431 and the uneven | corrugated transfer film 531, as shown in FIG. 14, of the base film 132 in the in-mold film 431 The surface 132a and the back surface 531b of the uneven transfer film 531 (the other surface of the uneven transfer film in the present invention) are opposed to each other, and the adhesive layer 134 of the in-mold film 431 is disposed. The in-mold film 431 and the uneven | corrugated transfer film 531 are set to the in-mold film transfer apparatus 103 so that it may oppose the cavity surface 102e of the stationary side die 111, and it manufactures as mentioned above Perform the same process as the process. In this case, when the resin is injected into the cavity 102a of the mold 102 into which the in-mold film 431 and the uneven transfer film 531 are inserted, the uneven portion of the uneven transfer film 531 The uneven portion 21 in which the shape of 541 is transferred (traced) is formed in the transparent conductive film 12.

Also in this method for manufacturing an intermediate for touch panels, a mold having no uneven parts formed on the unevenly shaped transfer film 531, the in-mold inmolding film 431, and the cavity surface 102f that can be manufactured at low cost. Since the uneven portion 21 can be formed in the transparent conductive film 12 of the lower electrode 2a by in-mold molding using the 102, the lower portion is formed by using an in-mold mold having fine uneven portions formed on the cavity surface. Compared with the conventional manufacturing method of manufacturing the electrode 2a, the manufacturing cost of the metal mold 102 can be fully reduced. Therefore, also in this manufacturing method of the intermediate bodies for touch panels, the manufacturing cost of the lower electrode 2a and the touch panel 1 can fully be reduced so that the manufacturing cost of the metal mold 102 can be reduced. In addition, as shown in FIG. 15, as shown in FIG. 16 and the uneven | corrugated transfer film 631 which formed the surface 631a flat and provided the uneven part 641 in the back surface 631b, The uneven transfer film 731 having the uneven portions 741 formed on both the front surface 731a and the back surface 731b may be used instead of the uneven transfer film 531. In this case, the concave-convex transfer films 631 and 731 are made of a resin having the appropriate flexibility and elasticity of about 15 μm to 100 μm (the same resin as that used for the formation of the concave-convex transfer film 531). It is formed and can be manufactured at low cost in the same manner as the uneven transfer film 531.

1 is a perspective view illustrating a configuration of the touch panel 1.

FIG. 2 is a side view of the lower electrode 2a, the upper electrode 2b, and the dot spacer 3 seen in the direction of arrow A in FIG.

3 is a configuration diagram showing the configuration of the manufacturing apparatus 101.

4 is a cross-sectional view of the mold 102.

5 is a cross-sectional view of a state in which the stationary side die 111 and the moving side die 121 are joined.

6 is a cross-sectional view showing the configuration of the in-mold film 131.

7 is an explanatory diagram for illustrating a method for manufacturing the base film 132.

It is explanatory drawing for demonstrating the method of in-molding shaping | molding.

It is another explanatory drawing for demonstrating the method of in-molding shaping | molding.

10 is another explanatory diagram for explaining the method of in-molding molding.

11 is a cross-sectional view illustrating a configuration of the in-mold film 231.

12 is a cross-sectional view illustrating the configuration of the in-mold film 331.

FIG. 13 is an explanatory diagram for explaining a method of in-molding using the in-mold film 431 and the uneven-shaped transfer film 531.

14 is another explanatory diagram for explaining a method of in-molding using the in-mold film 431 and the uneven transfer film 531.

15 is an explanatory diagram for explaining a method of in-molding using the in-mold film 431 and the uneven transfer film 631.

FIG. 16: is explanatory drawing for demonstrating the method of in-molding using the in-mold film 431 and the uneven-shaped transfer film 731. FIG.

<Description of the symbols for the main parts of the drawings>

1: touch panel

2: main body

11: substrate

11a: inside

12: transparent conductive film

102: Mold

102a: cavity

131, 231, 331, 431: In-mold film

132: base film

132a, 531a, 631a, 731a: surface

132b, 531b, 631b, 731b: back side

141, 541: uneven portion

142: recess

143: convex portion

531, 631, 731: uneven shape transfer film

P1, P2, P11, P12: Formation Pitch

Claims (5)

For a touch panel comprising a resin base film and a transparent conductive film formed on one surface of the base film and molded by injecting resin into the in-mold molding cavity in a state of being sandwiched in an in-mold molding die. As an in-mold film in which the said transparent conductive film is stuck to one surface of the board | substrate of an intermediate body, The film for in-mold with which the uneven part comprised by the stripe-shaped recessed part and the stripe-shaped convex part by turns is provided in the said transparent conductive film. The in-mold film according to claim 1, wherein the uneven portion is formed on both the other surface of the base film and the transparent conductive film. Resin is injected into the cavity of the in-mold mold in which the in-mold film for in-molding in which the transparent conductive film is formed on one surface of the resin base film is molded, and the substrate of the intermediate for touch panel is molded. As an intermediate manufacturing method for touch panels which pastes the said transparent conductive film, and manufactures the said intermediate bodies for touch panels, The in-mold film is formed in the in-mold film in a state in which the concave-convex portions formed by alternately arranged stripe-shaped concave portions and stripe-shaped convex portions face the transparent conductive film of the in-mold film formed on the transparent conductive film toward the cavity side. The intermediate | middle manufacturing method for touch panels which manufactures the said intermediate part for touch panels by inserting in the said metal mold | die, and injecting the said resin, and transferring the shape of the said uneven part to the said one surface of the said board | substrate. The intermediate | middle manufacturing method for touch panels of Claim 3 using the said in-mold film provided in the said uneven part on both the other surface of the said base film, and the said transparent conductive film. Resin is injected into the cavity of the in-mold mold in which the in-mold film for in-molding in which the transparent conductive film is formed on one surface of the resin base film is molded, and the substrate of the intermediate for touch panel is molded. As an intermediate manufacturing method for touch panels which pastes the said transparent conductive film, and manufactures the said intermediate bodies for touch panels, Cavity surface for forming the concave-convex transfer film formed on at least one of one surface and the other surface of the concave-convex portion formed by alternating stripe-shaped concave portion and convex-shaped convex portion on the one surface and the other surface; The intermediate | mold manufacturing method for touch panels which manufactures the said intermediate parts for touch panels by sandwiching the said uneven shape film and the said in-mold films in the said in-molding metal mold | die, in the state located between the in-mold films.

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