JP5486969B2 - Manufacturing method of touch panel - Google Patents

Description

  The present invention relates to a method for manufacturing a touch panel in which an input position detection electrode is formed on a tempered glass substrate.

  Among various touch panels, for example, in a capacitive touch panel, a light-transmitting input position detection electrode is formed on one surface of a glass substrate, and an input operation is performed on the glass substrate. The translucent cover glass is bonded with an adhesive (see Patent Document 1).

  Here, if a tempered glass substrate is used as the glass substrate, the glass substrate on which the input position detection electrodes are formed can be used as the cover glass, and the number of components can be reduced and the touch panel can be made thinner and lighter. There are advantages.

JP 2009-259203 A

  In order to obtain a glass substrate on which input position detection electrodes are formed, from the viewpoint of obtaining high productivity, a film forming process and a patterning process are performed in the state of a large glass substrate on which many glass substrates can be obtained. After forming an electrode, the method of cutting out the several glass substrate of single item size from a large sized glass substrate is common. However, when a large tempered glass substrate is used as the large glass substrate, there is a problem that such a method cannot be adopted. That is, after forming the input position detecting electrode on the large tempered glass substrate and forming the scribe groove to cut the tempered glass substrate, the tempered glass substrate is broken by the stress of the tempered glass substrate itself. In addition, although the method of cut | disconnecting a tempered glass board | substrate is also proposed, since it cuts a lot of effort using a special cutting device, productivity is low. Therefore, when a tempered glass substrate is used as the glass substrate, it is necessary to form an input position detecting electrode by performing a film forming process or a patterning process for each tempered glass substrate having a single size. There is a problem that is low.

  In view of the above problems, an object of the present invention is to provide a touch panel manufacturing method capable of obtaining high productivity even when a tempered glass substrate is used as a glass substrate on which an input position detection electrode is formed. It is in.

In order to solve the above-mentioned problems, the present invention provides a touch panel manufacturing method in which an input position detection electrode is formed on a tempered glass substrate, and a tempered glass substrate that is tempered after cutting a large glass substrate. a substrate placement step of plurality placed on a carrying substrate, and an electrode forming step of simultaneously forming the input position detection electrode to double the number of sheets of tempered glass substrate on which are disposed conveyance substrate, feeding transportable a substrate removal step of removing the substrate or RaTsutomu glass substrate, that having a.

  In the present invention, since the input position detection electrode is formed on the tempered glass substrate, there is an advantage that the glass substrate itself on which the input position detection electrode is formed can be used as a cover glass. In addition, when forming the input position detection electrodes on the tempered glass substrate, a plurality of single-size tempered glass substrates are arranged on the transfer substrate, and in this state, the input position detection electrodes are placed on the plurality of tempered glass substrates. Are formed simultaneously, and then the tempered glass substrate is removed from the transfer substrate. For this reason, since it is not necessary to perform the film-forming process and the patterning process for each tempered glass substrate, it is possible to obtain high productivity.

Moreover , since it is not necessary to cut a large tempered glass substrate, a single-size tempered glass substrate can be efficiently produced.

In the present invention, the conveyance substrate, it is preferable that the positioning portion for defining a position of the strengthening glass substrate is formed. According to such a configuration, since the tempered glass substrate can be disposed at a predetermined position on the transport substrate, high accuracy can be obtained in the position and shape of the input position detection electrode and the like.

In the present invention, position-decided Me unit, for example, a recess formed in the conveyance substrate. According to such a configuration, the tempered glass substrate can be reliably disposed at a predetermined position on the transport substrate, so that high accuracy can be obtained in the position and shape of the input position detection electrode and the like.

In the present invention, the concave portion, it is preferable that movement limiting member for limiting the movement of strengthening the glass substrate within the recess is disposed. With this configuration, the tempered glass substrate can be held at a predetermined position on the transport substrate, so that the position and shape of the input position detection electrode and the like can be obtained with high accuracy.

In the present invention, it is preferable that the moving limit member is liquid. According to such a configuration, the tempered glass substrate can be prevented from moving in the recess only by placing the liquid material around the bottom of the recess or around the tempered glass substrate before or after the tempered glass substrate is placed in the recess. be able to.

In the present invention, the moving limit member may be water. The use of water as a moving limiting member, and that the tempered glass substrate by the movement restriction member is contaminated, it is possible to prevent being damaged, handling and the movement restriction member, such as removal of the movement restriction member from the recess Easy.

It is explanatory drawing of the electro-optical apparatus with an input function provided with the touchscreen which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the structure of the principal part of the touchscreen which concerns on Embodiment 1 of this invention. It is explanatory drawing of the conveyance board | substrate etc. which are used with the manufacturing method of the touch panel which concerns on Embodiment 1 of this invention. It is process sectional drawing which shows the manufacturing method of the touchscreen which concerns on Embodiment 1 of this invention. It is process sectional drawing which shows the manufacturing method of the touchscreen which concerns on Embodiment 1 of this invention. It is explanatory drawing of the conveyance board | substrate etc. which are used with the manufacturing method of the touchscreen which concerns on Embodiment 2 of this invention. It is explanatory drawing of the conveyance board | substrate etc. which are used with the manufacturing method of the touchscreen which concerns on Embodiment 3 of this invention. It is explanatory drawing of the conveyance board | substrate etc. which are used with the manufacturing method of the touchscreen which concerns on the example of improvement of Embodiment 3 of this invention. It is explanatory drawing of the electronic device provided with the electro-optical apparatus with an input function to which this invention is applied.

  Embodiments of the present invention will be described with reference to the drawings. In the drawings to be referred to in the following description, the scales are different for each layer and each member so that each layer and each member have a size that can be recognized on the drawing. 3 to 5 referred to in the following description, the deposition surface of the glass substrate is shown facing upward.

[Embodiment 1]
(Overall configuration of electro-optical device with input function)
1A and 1B are explanatory diagrams of an electro-optical device with an input function including a touch panel according to Embodiment 1 of the present invention, and FIGS. 1A and 1B are perspective views of the electro-optical device with an input function. And FIG.

  1A and 1B, an electro-optical device 100 with an input function according to the present embodiment is generally an image generation device 5 composed of a liquid crystal device or the like, and a surface on the side from which display light is emitted in the image generation device 5. The image generation device 5 and the touch panel 1 are bonded to each other by, for example, an adhesive layer 85 or the like. The image generating apparatus 5 includes a liquid crystal panel as an electro-optical panel 5a (display panel). In this embodiment, both the touch panel 1 and the electro-optical panel 5a have a rectangular planar shape, and the central area when the touch panel 1 and the electro-optical device 100 with an input function are viewed in plan is the input area 2a. Further, in the image generating device 5 and the electro-optical device 100 with an input function, an area that overlaps the input area 2a in plan view is an image forming area. In the touch panel 1, the flexible wiring board 35 is connected to the side where the end 90e of the touch panel 1 is located, and the flexible wiring board 73 is connected to the side where the end 90e of the touch panel 1 is located in the electro-optical panel 5a. .

  The image generation device 5 is a transmissive or transflective active matrix liquid crystal display device, and is opposite to the side on which the touch panel 1 is disposed with respect to the electro-optical panel 5a (display light emission side and Is provided with a backlight device (not shown). The backlight device includes, for example, a translucent light guide plate that is placed on the side opposite to the side where the touch panel 1 is placed with respect to the electro-optical panel 5a, and a white color toward the side end of the light guide plate. A light source such as a light emitting diode that emits light, etc., and the light emitted from the light source is incident on the side edge of the light guide plate and then emitted toward the electro-optical panel 5a while propagating through the light guide plate. Is done. A sheet-like optical member such as a light scattering sheet or a prism sheet may be disposed between the light guide plate and the electro-optical panel 5a.

  In the image generating apparatus 5, a first polarizing plate 81 is placed on the electroluminescent panel 5a on the display light emission side, and a second polarizing plate 82 is placed on the opposite side. The electro-optical panel 5a includes a light-transmitting element substrate 50 disposed on the side opposite to the display light emission side, and a light-transmitting counter element disposed opposite to the element substrate 50 on the display light emission side. And a substrate 60. The counter substrate 60 and the element substrate 50 are bonded to each other with a rectangular frame-shaped sealing material 71, and the liquid crystal layer 55 is held in a region surrounded by the sealing material 71 between the counter substrate 60 and the element substrate 50. ing. In the element substrate 50, a plurality of pixel electrodes 58 are formed on a surface facing the counter substrate 60 by a translucent conductive film such as an ITO (Indium Tin Oxide) film or an IZO (Indium Zinc Oxide) film. A common electrode 68 is formed of a light-transmitting conductive film such as an ITO film on the surface facing the element substrate 50. Further, a color filter is formed on the counter substrate 60. When the image generation apparatus 5 is an IPS (In Plane Switching) method or an FFS (Fringe Field Switching) method, the common electrode 68 is provided on the element substrate 50 side. Further, the element substrate 50 may be arranged on the display light emitting side with respect to the counter substrate 60. In the element substrate 50, a driving IC 75 is COG-mounted in an overhang region 59 projecting from the edge of the counter substrate 60, and a flexible wiring board 73 is connected to the overhang region 59. Note that a drive circuit may be formed on the element substrate 50 simultaneously with the switching elements on the element substrate 50.

(Schematic configuration of the capacitive touch panel 1)
The touch panel 1 includes a tempered glass substrate 90. The tempered glass substrate 90 has a function as a cover glass that constitutes an input operation surface of the touch panel 1, and a function as a sensor substrate on which the input position detection electrode 21 is formed. It has.

  In this embodiment, the tempered glass substrate 90 is made of chemically tempered glass. Such chemically tempered glass is glass that has been subjected to chemical tempering treatment by immersing it in a potassium salt molten bath at a temperature of about 400 ° C., and sodium ions of the glass substrate are ion-exchanged with potassium ions. Here, the ionic radius of sodium is 95 nm, whereas the ionic radius of potassium ions is 133 nm. The ionic radius of potassium ions is larger than that of sodium ions. For this reason, the glass substrate is in a state where the strength is enhanced by the compressive stress resulting from the chemical strengthening layer on the surface. Therefore, the tempered glass substrate 90 of this embodiment has a very thin thickness of about 0.2 mm.

  As shown in FIG. 1B, in the tempered glass substrate 90, the side of the second surface 90b located on the side opposite to the first surface 90a on the input operation surface side will be described in detail later. A light-shielding printed layer 94, a base film 95, a first light-transmitting conductive film 4a, an interlayer insulating film 23, a second light-transmitting conductive film 4b, and a topcoat layer 96 are formed in this order toward the side. A peripheral wiring 27 is formed on the base film 95 on the second surface 90 b side of the tempered glass substrate 90. The light shielding printing layer 94 is formed in the peripheral area 2b outside the input area 2a on the second surface 90b of the tempered glass substrate 90, and the area surrounded by the light shielding printing layer 94 is the input area 2a. .

  In the touch panel 1 configured as described above, the input position detecting electrode 21 is formed by the first light-transmitting conductive film 4a. Of the end portions 90e, 90f, 90g, and 90h of the tempered glass substrate 90, the flexible wiring substrate 35 is connected to the second surface 90b side at the end portion 90e. It is electrically connected to the mounting terminal 24 consisting of the end of the.

  Between the touch panel 1 and the electro-optical panel 5a, a conductive film for shielding in which a light-transmitting conductive film such as an ITO film is formed on the light-transmitting film may be disposed. It has the function of preventing the potential change on the image generating device 5 side from affecting the input position detecting electrode 21 as noise. Note that the conductive film may be omitted when a sufficient distance can be secured between the image generation device 5 and the input position detection electrode 21.

(Detailed configuration of touch panel 1)
FIG. 2 is an explanatory diagram showing a configuration of a main part of the touch panel 1 according to Embodiment 1 of the present invention. FIGS. 2A and 2B are input position detection electrodes formed on a tempered glass substrate 90. FIG. It is explanatory drawing which shows planar structure, such as these, and sectional drawing. In FIG. 2A, the corner of the input area 2a is indicated by an English letter “L” mark. FIG. 2B corresponds to a cross-sectional view of the touch panel 1 cut along the line CC ′ in FIG.

  As shown in FIG. 2 (a), in the touch panel 1 of this embodiment, on the second surface 90b side of the tempered glass substrate 90, for input position detection extending in the X direction (first direction) in the input region 2a. And a plurality of second electrodes 212 for input position detection extending in the Y direction (second direction) intersecting the X direction in the input region 2a. An input position detection electrode 21 is formed by the first electrode 211 and the second electrode 212. Further, on the second surface 90 b of the tempered glass substrate 90, the peripheral region 2 b corresponding to the outside of the input region 2 a has peripheral wiring 27 extending from one end portion of the first electrode 211 and the second electrode 212. Peripheral wiring 27 extending from one end is formed.

  A portion of the peripheral wiring 27 located at the outer peripheral end 90 e is a mounting terminal 24. Note that the light-shielding printed layer 94 described with reference to FIG. 1B overlaps the peripheral wiring 27 and the mounting terminal 24, and the peripheral wiring 27 and the mounting terminal 24 are viewed from the input operation surface side. The terminal arrangement region 240 in which is formed cannot be seen.

  As shown in FIG. 2 (b), in the touch panel 1 of the present embodiment, the black light-shielding print layer 94 is formed on the second surface 90b side of the tempered glass substrate 90 from the lower layer side toward the upper layer side. A base film 95 made of resin or the like, the first light-transmissive conductive film 4a, the interlayer insulating film 23, the second light-transmissive conductive film 4b, and a top coat layer 96 made of a photosensitive resin or the like are formed in this order. A peripheral wiring 27 is formed on the second surface 90 b side of the tempered glass substrate 90.

  As shown in FIGS. 2A and 2B, in the touch panel 1 of the present embodiment, the black light-shielding print layer 94 is formed in the peripheral region 2 b of the second surface 90 b of the tempered glass substrate 90. The light-shielding printing layer 94 needs to be formed thicker from the viewpoint of light shielding properties, and becomes thicker as long as the printing method is used, and the thickness is 30 μm to 50 μm. Therefore, a base film 95 made of a light-transmitting photosensitive resin or the like is formed on the second surface 90b of the tempered glass substrate 90 on the upper side of the light-shielding print layer 94, and the base film 95 is a flattening film. Function as. For this reason, the step part resulting from the light-shielding print layer 94 is relieved by the base film 95, and on the base film 95, the first light-transmitting conductive film 4a and the second light-transmitting film are formed in the input region 2a. A conductive film 4b is formed, and a peripheral wiring 27 is formed in the peripheral region 2b.

  In this embodiment, the first light-transmitting conductive film 4a is made of a polycrystalline ITO film, and a light-transmitting insulating film such as a photosensitive resin film or a silicon oxide film is formed on the upper layer side of the first light-transmitting conductive film 4a. An interlayer insulating film 23 made of is formed. In the present embodiment, the second translucent conductive film 4b is also made of a polycrystalline ITO film, like the first translucent conductive film 4a.

  The first translucent conductive film 4a is first formed as a plurality of rhombus regions in the input region 2a, and the rhombus regions are pad portions 211a of the input position detection electrodes 21 (first electrode 211 and second electrode 212). , 212a (large area portion). These pad portions 211a and 212a are alternately arranged in the X direction and the Y direction. In the plurality of pad portions 211a, adjacent pad portions 211a in the X direction (first direction) are connected via a connecting portion 211c, and the pad portion 211a and the connecting portion 211c extend in the X direction. Is configured. On the other hand, the plurality of pad portions 212a constitute the second electrode 212 extending in the Y direction (second direction), but overlap between the pad portions 212a adjacent in the Y direction, that is, the connecting portion 211c. The portion is a discontinuous portion 218a.

  The interlayer insulating film 23 is formed in a wide area from the input area 2a to the peripheral area 2b. A contact hole 23a is formed in the interlayer insulating film 23, and the contact hole 23a is formed at a position overlapping the end portion facing the gap portion 218a in the pad portion 212a. On the upper layer side of the interlayer insulating film 23, the second translucent conductive film 4b is formed as a relay electrode 215 in a region overlapping the contact hole 23a.

  In the touch panel 1 configured as described above, the first electrode 211 and the second electrode 212 are formed of the same conductive film (first translucent conductive film 4a) and extend in directions intersecting each other. Therefore, on the tempered glass substrate 90, there is an intersection 218 where the first electrode 211 and the second electrode 212 intersect. Here, of the first electrode 211 and the second electrode 212, the first electrode 211 extends in the X direction by the connecting portion 211c made of the second light-transmissive conductive film 4b even at the intersection 218. On the other hand, the second electrode 212 has a discontinuous portion 218 a at the intersection 218. However, at the intersection 218, a relay electrode 215 is formed above the interlayer insulating film 23, and the relay electrode 215 is adjacent to the pad adjacent to the interrupted portion 218a via the contact hole 23a of the interlayer insulating film 23. 212a is electrically connected. For this reason, the second electrode 212 extends in the Y direction while being electrically connected in the Y direction. The relay electrode 215 overlaps the connecting portion 211c with the interlayer insulating film 23 interposed therebetween, so there is no possibility of short circuit.

  In this embodiment, the peripheral wiring 27 is formed on the base film 95 on the second surface 90b side of the tempered glass substrate 90, and the peripheral wiring 27 is required to have a low resistance. For this reason, the peripheral wiring 27 is composed of a lower wiring layer 271 made of the first light-transmissive conductive film 4 a extending along the region where the peripheral wiring 27 is formed, and a metal layer stacked on the lower wiring layer 271. And an upper wiring layer 272 made of 4e. In this embodiment, an APC film made of a silver-palladium-copper alloy is used for the upper wiring layer 272.

  In the present embodiment, a top coat layer 96 made of a photosensitive resin or the like is formed on the upper side of the second translucent conductive film 4b on the second surface 90b side of the tempered glass substrate 90, and the top coat layer 96 is formed on substantially the entire surface excluding the terminal arrangement region 240.

(Input position detection method)
In the capacitive touch panel 1 configured as described above, when a position detection signal in the form of a rectangular pulse is output to the input position detection electrode 21, the input position detection is performed when no capacitance is parasitic on the input position detection electrode 21. A signal having the same waveform as the position detection signal applied to the electrode 21 is detected. On the other hand, if a capacitance is parasitic on the input position detection electrode 21, a waveform distortion due to the capacitance occurs. Therefore, it is detected whether or not the capacitance is parasitic on the input position detection electrode 21. be able to. Accordingly, when the finger approaches one of the plurality of input position detection electrodes 21 on the first surface 90a side (the input operation surface side) of the tempered glass substrate 90, the input position detection electrode approached by the finger. In 21, the electrostatic capacity increases by the electrostatic capacity generated between the finger and the electrode where the finger is close can be specified.

(Method for manufacturing touch panel 1)
FIG. 3 is an explanatory diagram of a transport substrate and the like used in the method for manufacturing the touch panel 1 according to Embodiment 1 of the present invention, and FIGS. 3 (a), (b), and (c) are perspective views of the transport substrate. It is a top view which shows a mode that the tempered glass board | substrate 90 has been arrange | positioned on a conveyance board | substrate, and sectional drawing which shows a mode that the tempered glass board | substrate 90 has been arrange | positioned on a conveyance board | substrate. 4 and 5 are process cross-sectional views illustrating the method for manufacturing touch panel 1 according to Embodiment 1 of the present invention.

  In manufacturing the touch panel 1 of the present embodiment, a plurality of tempered glass substrates 90 having a single product size are prepared as shown in FIG. The tempered glass substrate 90 is a chemically tempered glass substrate obtained by cutting a large glass substrate into a plurality of glass substrates of a single size and then immersing the plurality of glass substrates together in a potassium salt molten bath.

  In order to manufacture the touch panel 1 using the tempered glass substrate 90, first, in the light shielding printing layer forming step, the light shielding printing is performed on the peripheral region 2b outside the input region 2a on the second surface 90b side of the tempered glass substrate 90. Layer 94 is formed.

  Next, a transport substrate 500 is prepared, and a plurality of tempered glass pieces each having a single size are provided on the substrate mounting surface 510 of the transport substrate 500 in the substrate placement step shown in FIGS. 3B, 3C, and 4A. The substrate 90 is arranged so that the second surface 90b faces upward. Here, the transport substrate 500 is a rectangular plate-like member, and a notch 505 indicating the orientation of the transport substrate 500 is formed in one of the four corners. In this embodiment, when the tempered glass substrate 90 is disposed on the transport substrate 500, the adhesive layer 520 is provided on the entire surface of the substrate mounting surface 510 of the transport substrate 500, and the tempered glass is disposed at a predetermined position on the transport substrate 500. The substrate 90 is held. However, since it is necessary to finally remove the tempered glass substrate 90 from the transport substrate 500, the adhesive layer 520 includes an adhesive material made of an adhesive or the like so that the tempered glass substrate 90 can be easily removed. A polyvinyl alcohol-based adhesive material that can be dissolved in water or the like is used.

  Next, in the base layer forming step shown in FIG. 4B, a resin coating step and a solidifying step are performed on the second surface 90b side of the tempered glass substrate 90, and the input region 2a is formed on the upper side of the light-shielding print layer 94. An insulating base film 95 made of a photosensitive resin or the like is formed on both the peripheral region 2b. As a result, the step portion resulting from the light-shielding print layer 94 is relaxed by the base film 95. Note that the base film 95 is also formed between adjacent tempered glass substrates 90.

  Next, in the electrode formation step shown in FIGS. 4C, 4D, and 4E and FIGS. 5A and 5B, the input position detection electrode 21 and the like are formed. More specifically, as shown in FIG. 4 (c), the first light-transmissive conductive film 4a made of an ITO film on the entire second surface 90b side of the tempered glass substrate 90 by sputtering, vapor deposition, or the like, and A metal film 4e made of an APC film is sequentially formed. Next, the metal film 4e is etched in a state where a resist mask is formed by a photolithography technique, and the upper wiring layer 272 of the peripheral wiring 27 is patterned and formed as shown in FIG. Next, the first light-transmitting conductive film 4a is etched in a state where a resist mask is formed by a photolithography technique, and as shown in FIG. 4E, the input position detection electrode 21 (the first electrode 211 and the second electrode). The electrode 212) is formed by patterning. At that time, the lower wiring layer 271 of the peripheral wiring 27 is also formed. Next, in the interlayer insulating film forming step shown in FIG. 5A, an interlayer insulating film 23 provided with contact holes 23a is formed. Here, when the interlayer insulating film 23 is formed of a silicon oxide film, a silicon oxide film forming process and a patterning process are performed. When the interlayer insulating film 23 is formed of a photosensitive resin, A coating process, an exposure / development process are performed. The interlayer insulating film 23 is formed in a region that does not overlap with the terminal arrangement region 240. Next, in the second translucent conductive film forming step shown in FIG. 5B, the ITO film forming step and the patterning step are performed to form the relay electrode 215.

  Next, in the top coat layer forming step shown in FIG. 5C, a resin coating step and a solidifying step are performed on the second surface 90 b side of the tempered glass substrate 90 to form the top coat layer 96. Here, the top coat layer 96 is formed in a region that does not overlap with the terminal array region 240.

  Next, as shown in FIG. 5D, the tempered glass substrate 90 is removed from the transfer substrate 500. Thereafter, when the flexible wiring board 35 is connected to the terminal array region 240 of the tempered glass substrate 90, the touch panel 1 including the tempered glass substrate 90 described with reference to FIGS. 1 and 2 is formed.

(Main effects of this form)
As described above, in the touch panel 1 and the manufacturing method thereof according to the present embodiment, since the input position detection electrode 21 is formed on the tempered glass substrate 90, the glass substrate 90 itself on which the input position detection electrode 21 is formed is used. Available as cover glass. Therefore, the number of parts can be reduced, and the touch panel 1 can be reduced in thickness and weight.

  In forming the input position detecting electrode 21 on the tempered glass substrate 90, a plurality of single-size tempered glass substrates 90 are arranged on the transfer substrate 500 in the substrate arranging step. An electrode forming step of simultaneously forming the input position detecting electrodes 21 on the tempered glass substrate 90 is performed. In addition, after the electrode forming step, the tempered glass substrate 90 is removed from the transfer substrate 500 in the substrate removing step. For this reason, since it is not necessary to perform the film-forming process and the patterning process for every tempered glass substrate 90, and to form the input position detection electrode 21, high productivity can be obtained.

  In this embodiment, the tempered glass substrate 90 is tempered after cutting the large glass substrate. For this reason, since it is not necessary to cut a large tempered glass substrate, single size tempered glass substrate 90 can be produced efficiently.

[Embodiment 2]
FIG. 6 is an explanatory diagram of the transfer substrate 500 and the like used in the method for manufacturing the touch panel 1 according to Embodiment 2 of the present invention. FIGS. 6 (a), (b), and (c) are perspective views of the transfer substrate 500. FIG. 4 is a plan view showing a state in which a tempered glass substrate 90 is arranged on the transfer substrate 500, and a cross-sectional view showing a state in which the tempered glass substrate 90 is arranged on the transfer substrate 500. Since the basic configuration of this embodiment is substantially the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  Also in this embodiment, as in the first embodiment, as shown in FIG. 6A, a plurality of tempered glass substrates 90 having a single product size are prepared. The tempered glass substrate 90 is a chemically tempered glass substrate obtained by cutting a large glass substrate into a plurality of glass substrates of a single size and then immersing the plurality of glass substrates together in a potassium salt molten bath. In order to manufacture the touch panel 1 using the tempered glass substrate 90, first, in the light shielding printing layer forming step, the light shielding printing is performed on the peripheral region 2b outside the input region 2a on the second surface 90b side of the tempered glass substrate 90. Layer 94 is formed. Next, the transfer substrate 500 is prepared, and a plurality of single-size tempered glass substrates 90 are placed on the second surface on the substrate mounting surface 510 of the transfer substrate 500 in the substrate placement step shown in FIGS. Arrange so that 90b faces upward.

  Here, in Embodiment 1, the adhesive layer 520 is provided on the entire surface of the substrate mounting surface 510 of the transport substrate 500 when the tempered glass substrate 90 is disposed on the transport substrate 500. In this embodiment, FIG. An adhesive layer 520 smaller than the tempered glass substrate 90 is provided in a region overlapping the tempered glass substrate 90 in the substrate mounting surface 510 of the transfer substrate 500 shown in a) and (c). As the adhesive layer 520, an adhesive material made of a pressure-sensitive adhesive, a polyvinyl alcohol-based adhesive material that can be dissolved in water or the like is used so that the tempered glass substrate 90 can be easily removed.

  After the plurality of tempered glass substrates 90 are arranged on the substrate mounting surface 510 of the transfer substrate 500 in this way, the input position is detected on the tempered glass substrate 90 by performing the steps described with reference to FIGS. The touch panel 1 on which the electrode 21 is formed can be manufactured.

  In adopting such a method, in this embodiment, since the adhesive layer 520 is provided small, the tempered glass substrate 90 is removed from the transport substrate 500 as described with reference to FIG. Easy.

[Modifications of Embodiments 1 and 2]
In the first and second embodiments, an adhesive material made of an adhesive or a polyvinyl alcohol-based adhesive material that can be dissolved by water or the like is used as the adhesive layer 520, but wax is used as the adhesive layer 520. Also good. Since the adhesive layer 520 made of such wax melts when heated, there is an advantage that the tempered glass substrate 90 can be easily removed from the transport substrate 500.

[Embodiment 3]
FIG. 7 is an explanatory diagram of the transport substrate 500 and the like used in the method for manufacturing the touch panel 1 according to Embodiment 3 of the present invention. FIGS. 7 (a), 7 (b), and 7 (c) are perspective views of the transport substrate 500. FIG. 4 is a plan view showing a state in which a tempered glass substrate 90 is arranged on the transfer substrate 500, and a cross-sectional view showing a state in which the tempered glass substrate 90 is arranged on the transfer substrate 500. Since the basic configuration of this embodiment is substantially the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  When manufacturing the touch panel 1 of this embodiment, as in the first embodiment, as shown in FIG. 7A, a plurality of tempered glass substrates 90 of a single product size are prepared. The tempered glass substrate 90 is a chemically tempered glass substrate obtained by cutting a large glass substrate into a plurality of glass substrates of a single size and then immersing the plurality of glass substrates together in a potassium salt molten bath. In order to manufacture the touch panel 1 using the tempered glass substrate 90, first, in the light shielding printing layer forming step, the light shielding printing is performed on the peripheral region 2b outside the input region 2a on the second surface 90b side of the tempered glass substrate 90. Layer 94 is formed. Next, a transport substrate 500 is prepared, and a plurality of single-size tempered glass substrates 90 are placed on the second surface of the substrate mounting surface 510 of the transport substrate 500 in the substrate placement step shown in FIGS. Arrange so that 90b faces upward.

  Here, on the substrate mounting surface 510 of the transfer substrate 500 used in the present embodiment, a positioning portion 530 that defines the arrangement position of the tempered glass substrate 90 is configured at the position where the tempered glass substrate 90 is arranged. In this embodiment, the positioning portion 530 includes a recess 535 that is slightly larger than the tempered glass substrate 90, and the depth dimension of the recess 535 is smaller than the thickness dimension of the tempered glass substrate 90. For this reason, when the tempered glass substrate 90 is mounted on the inner side of the recess 535 on the substrate mounting surface 510 of the transfer substrate 500, the second surface 90b of the tempered glass substrate 90 is protruded from the substrate mounting surface 510.

  In this manner, after the plurality of tempered glass substrates 90 are arranged on the substrate mounting surface 510 of the transfer substrate 500, the input position is input to the tempered glass substrate 90 by performing the process described with reference to FIGS. The touch panel 1 on which the detection electrode 21 is formed can be manufactured.

  In adopting such a method, in this embodiment, a positioning portion 530 that defines an arrangement position of the tempered glass substrate 90 is formed by the concave portion 535 in the transport substrate 500. For this reason, since the tempered glass substrate 90 can be reliably held at a predetermined position on the transfer substrate 500, high accuracy can be obtained in the position and shape of the input position detection electrode 21 and the like. In addition, when the tempered glass substrate 90 is mounted inside the recess 535 of the transport substrate 500, the second surface 90b of the tempered glass substrate 90 protrudes from the substrate mounting surface 510. Convenient to remove from.

[Modification of Embodiment 3]
In the third embodiment, the positioning portion 530 including the concave portion 535 is provided on the substrate mounting surface 510 of the transport substrate 500. However, the convex portion that contacts the outer peripheral end of the tempered glass substrate 90 is used as the positioning portion 530. May be.

[Improvement of Embodiment 3]
FIG. 8 is an explanatory diagram of the transport substrate 500 and the like used in the method for manufacturing the touch panel 1 according to the improved example of the third embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of Embodiment 3, common portions are denoted by the same reference numerals and description thereof is omitted.

  In manufacturing the touch panel 1 of the present embodiment, as in the third embodiment, the transport substrate 500 in which the concave portion 535 (positioning portion 530) is formed on the substrate mounting surface 510 is used, and the tempered glass substrate 90 is attached to the concave portion 535. Thus, the steps described with reference to FIGS. 4 and 5 are performed. At this time, in order to prevent the position of the tempered glass substrate 90 from shifting in the recess 535, in this embodiment, a movement limiting member 550 that limits the movement of the tempered glass substrate 90 is disposed in the recess 535.

  In this embodiment, the movement limiting member 550 is a liquid material such as water, and is interposed between the inner wall of the recess 535 and the outer peripheral end of the tempered glass substrate 90 to limit the movement of the tempered glass substrate 90. The movement restricting member 550 having such a configuration prevents the tempered glass substrate 90 from moving in the recess 535 only by placing a liquid material in the recess 535 before or after the tempered glass substrate 90 is placed in the recess 535. can do. For this reason, since the tempered glass substrate 90 can be reliably held at a predetermined position on the transfer substrate 500, high accuracy can be obtained in the position and shape of the input position detection electrode 21 and the like. Further, when water is used as the movement restriction member 550, the movement restriction member 550 can prevent the tempered glass substrate 90 from being contaminated or damaged, and the movement restriction member 550 can be handled or restricted from moving inside the recess 535. The member 550 can be easily removed. In addition, as the liquid movement restriction member 550, a liquid material having viscosity such as oil may be used in addition to water.

[Other embodiments]
In the above embodiment, the light-shielding print layer 94 is formed before the tempered glass substrate 90 is mounted on the transport substrate 500. However, after the tempered glass substrate 90 is mounted on the transport substrate 500, the light-shielding print layer 94 is formed. May be.

  In the embodiment described above, the input position detection electrode 21 is formed by the first light-transmissive conductive film 4a, and the relay electrode 215 is formed by the second light-transmissive conductive film 4b. The present invention may be applied to a touch panel in which the relay electrode 215 is formed by the translucent conductive film 4a and the input position detection electrode 21 is formed by the second translucent conductive film 4b.

  In the above embodiment, a liquid crystal device is used as the image generating device 5, but an organic electroluminescence device may be used as the image generating device 5.

[Example of mounting on electronic devices]
An electronic apparatus to which the electro-optical device 100 with an input function according to the above-described embodiment is applied will be described. FIG. 9 is an explanatory diagram of an electronic apparatus including the electro-optical device 100 with an input function to which the present invention is applied. FIG. 9A shows a configuration of a mobile personal computer including the electro-optical device 100 with an input function. The personal computer 2000 includes an electro-optical device 100 with an input function as a display unit and a main body 2010. The main body 2010 is provided with a power switch 2001 and a keyboard 2002. FIG. 9B shows a configuration of a mobile phone including the electro-optical device 100 with an input function. A cellular phone 3000 includes a plurality of operation buttons 3001, scroll buttons 3002, and the electro-optical device 100 with an input function as a display unit. By operating the scroll button 3002, the screen displayed on the electro-optical device 100 with an input function is scrolled. FIG. 9C shows the configuration of a personal digital assistant (PDA) to which the electro-optical device 100 with an input function is applied. The information portable terminal 4000 includes a plurality of operation buttons 4001, a power switch 4002, and the electro-optical device 100 with an input function as a display unit. When the power switch 4002 is operated, various types of information such as an address book and a schedule book are displayed on the electro-optical device 100 with an input function.

  The electronic apparatus to which the electro-optical device 100 with an input function is applied includes, in addition to those shown in FIG. 9, a digital still camera, a liquid crystal television, a viewfinder type, a monitor direct-view type video tape recorder, a car navigation device, a pager, Examples include electronic notebooks, calculators, word processors, workstations, video phones, POS terminals, bank terminals, and other electronic devices. The electro-optical device 100 with an input function described above can be applied as a display unit of these various electronic devices.

1 .. Touch panel, 2a ... Input area, 2b ... Peripheral area, 21 ... Input position detection electrode, 90 ... Tempered glass substrate, 100 ... Electro-optical device with input function, 500 ... Transport board, 520 ..Adhesive layer 530 ..Positioning part 535 ..Recessed part 550 ..Movement prevention member

Claims (6)

A method of manufacturing a touch panel in which an input position detection electrode is formed on a tempered glass substrate,
After cutting the large-sized glass substrate, a substrate placing step of a tempered glass substrate formed by hardening, to a plurality placed on the transfer board,
An electrode forming step of simultaneously formed input position detection electrode to double the number Like the tempered glass substrate in a state of being arranged on the transport substrate,
A substrate removal step of removing the tempered glass substrate from the transport substrate;
A method for manufacturing a touch panel. The transport substrate is configured with a positioning portion that defines an arrangement position of the tempered glass substrate.
The manufacturing method of the touch panel of Claim 1. The positioning portion is a recess formed in the transport substrate.
The manufacturing method of the touch panel of Claim 2. In the recess, a movement limiting member that limits the movement of the tempered glass substrate in the recess is disposed.
The manufacturing method of the touch panel of Claim 3. The movement restriction member is a liquid material,
The manufacturing method of the touch panel of Claim 4. The movement restricting member is water;
The manufacturing method of the touch panel of Claim 5.