TWI520021B - Grass substrate for a touch panel and manufacturing method thereof - Google Patents

Description

Glass substrate for touch panel and method of manufacturing same

The present invention relates to a glass substrate for a touch panel in which a transparent detecting electrode for detecting an input position and a wiring pattern for connecting the detecting electrode pattern to the outside are formed, and a method for manufacturing the same, and further, A glass substrate for a touch panel and a method for producing the same, which are excellent in strength and are not required to be micro-cracked.

The touch panel is mounted on a mobile phone, a car navigation system, a portable information terminal, and the like as an instruction input device. Generally, the touch panel is combined with a display device that is stacked in the display device, and the display of the display device is targeted. It is used for the purpose of inputting the input position of the operation body such as a finger.

In order to detect the touch panel according to the input position of the input operating body, a resistance sensing method detected by the resistance value between the input position and the reference electrode, and a floating position of the input position according to the approach of the input operating body are proposed. The input capacitance detection method such as the electromagnetic induction method in which the capacitance is detected by the change of the capacitance and the position of the electrode of the electric signal input to the operation body is sensed by the electromagnetic induction, but the input position is detected by the electrical change. In these detection methods, one or a plurality of conductive detection patterns are formed on one surface of the insulating substrate that serves as the input operation surface.

As described above, in the touch panel on which the display device is disposed on the inner side, the portions constituting the touch panel are transparent by visually observing the display of the display device inside the touch panel through the input operation surface of the touch panel. Body structure In the case of using a transparent glass substrate as an insulating substrate, a detection electrode pattern made of a transparent conductive material such as ITO is formed on the surface of the glass substrate for a touch panel.

The detection electrode pattern made of a transparent conductive material is patterned on the surface of the glass substrate by photolithography, and the wiring pattern connecting the detection electrode pattern to the external circuit is formed on the surface of the glass substrate to be connected to the detection electrode pattern. . To form a detection electrode pattern or a wiring pattern on the surface of the glass substrate, it is necessary to form a transparent conductive film according to sputtering, adhesion of a photoresist layer, exposure development of a photoresist layer, etching of a transparent conductive film, printing of a wiring pattern, or In the production of a glass substrate for a touch panel, the surface of the glass original plate having a size of a plurality of glass substrates is subjected to the above-described respective steps to form a detection electrode pattern to be formed on each of the glass substrates. After the wiring pattern, each glass substrate is cut out from the original glass plate (Patent Document 1).

The step of cutting each of the glass substrates from the original glass plate is performed by cutting a notch along a contour of each glass substrate with a diamond cutter or the like, and cutting is performed by applying pressure to both sides of the notch by a punching machine, and cutting is performed by so-called scribing cutting. Each glass substrate is shown (patent document 2).

A capacitive touch panel that detects an input position by a change in electrostatic capacitance of a detection electrode pattern, such as a finger, is applied to a glass substrate on which a surface of the detection electrode pattern is formed, or a protective film is laminated on the input operation region. A decorative film of a specific display is printed around to form a touch panel.

In addition, a glass original plate is cut by chemical etching and configured to be touched. A method of manufacturing a glass substrate that covers a plurality of glass on the user side of the panel has been widely known from the introduction of Patent Document 3.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 4000178 (paragraphs 0035 to 0036 of the specification, Fig. 5)

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2009-294771 (paragraph 0015 of the specification, Fig. 2)

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2010-254511 (paragraphs 0029 to 0031 of the specification, Fig. 2)

When the glass substrate for a touch panel is cut out by a scribe line cutting method from a glass original plate, many micro cracks generate|occur|produce at the cut surface of the outline of each glass substrate. In particular, most of the damage of the glass substrate is caused by microcracks occurring in the periphery thereof, so that the mechanical strength is greatly reduced by scribing. On the other hand, when a touch panel is used as an input device for a portable electronic device such as a mobile phone that is required to be thinned, the glass substrate is also required to be thinned to a thickness of, for example, 1 mm or less, but the thin glass original plate is in action. After the device is mounted, it is easy to be damaged by the impact on the surface. It is necessary to laminate the surface to prevent the scattering film or the transparent protective substrate. As a result, it is difficult to reduce the thickness of the entire touch panel, and the scattering film is prevented by the overlap. Or transparently protecting the substrate to impair transparency. This can lead to a decrease in sense of quality.

A method of obtaining a specific strength by making the thickness of the glass substrate thinner than 1 mm is known. Chemical strengthening of ion exchange on the surface of the glass is known. However, when the glass original plate is chemically strengthened, it is impossible to cut and cut each of the glass substrates. As a result of the glass substrate, it is necessary to chemically strengthen each of the glass substrates, and the detection electrode pattern and the wiring pattern are formed for each of the glass substrates through the plurality of steps, which results in extremely inferior manufacturing efficiency and productivity.

Further, in the touch panel mounted on the mobile phone, it is expected that a curve can be added to the outline of the touch panel for design reasons, but the scribing cut by the mechanical impact can not be cut along the contour of the curved surface. Therefore, it has become very expensive to form a curved surface by cutting and physical grinding. Further, since such a micro-crack is generated by such cutting or polishing, there is a problem that the strength is deteriorated.

Here, as in the invention described in Patent Document 3, a method of cutting out each glass substrate from a glass original plate by chemical etching is examined. However, in the former glass original plate, as described above, in order to shorten the manufacturing process, The surface thereof is formed with a pull-out wiring pattern connected to the detecting electrode pattern or the detecting electrode, so it is necessary to cover the surface with a photoresist film, and chemically etch the portion not covered with the photoresist film by chemical polishing liquid containing fluoric acid. Each glass substrate.

However, since these detection electrode patterns or the drawn wiring patterns are stacked to form a plurality of conductive layers or insulating layers, the surface thereof does not become a uniform flat surface, and the photoresist film of the film cannot completely cover the entire surface. There will be a chemical polishing solution in the chemical etching step that is invaded by the gap of the photoresist film. Hey. In particular, the detection electrode pattern or the pull-out wiring pattern is formed of a material such as aluminum, silver, or MAM which is easily oxidized by hydrofluoric acid, so that the hydrofluoric acid leaking from the gap of the photoresist film is chemically attacked. There is a concern that the conductivity is poor, and the glass original plate on which the detection electrode pattern or the like is formed is not subjected to a chemical etching.

The present invention has been made in view of such a problem, and an object of the invention is to provide a glass substrate for a touch panel which can be manufactured together with other glass substrates for a touch panel and which has a specific thickness without causing micro cracks in the outline. Its manufacturing method.

Further, an object of the invention is to provide a glass substrate for a touch panel in which the contour of the touch panel is curved without deteriorating the strength, and a method of manufacturing the same.

In order to achieve the above object, a method for producing a glass substrate for a touch panel according to claim 1 is characterized in that a surface of the glass substrate is formed with a plurality of detection electrode patterns formed of a transparent conductive layer, and electrically connected to each detection. In the method for manufacturing a glass substrate for a touch panel in which a plurality of electrode patterns are drawn out of a wiring pattern, the contours of the plurality of glass substrates are projected onto the front and back sides by separating the front and back surfaces of the glass original plate having a size of a plurality of glass substrates. The step of forming a plurality of detection electrode patterns formed of a transparent conductive layer on each surface of the glass substrate surrounded by the cut-out line on the surface of the original glass plate, and forming the plurality of detection electrode patterns in the glass substrate region Step 2 of electrically connecting the pull-out wiring patterns of the respective detecting electrode patterns, and detecting electrode patterns and pull-out wiring patterns covering the respective glass substrate regions The overcoat is formed on the surface of the glass original plate, and the resistive film is formed on the front and back sides of the glass original plate on which the protective film is formed except for the cut region along the cut-out line. Step 4: masking the photoresist film to chemically etch the cut regions on both sides of the front and back surfaces of the glass original plate, and separating the glass substrates from the glass substrate by step 5, removing the photoresist film formed on both sides of the front and back of the glass substrate. Step 6: A glass substrate for a touch panel manufactured by patterning a surface of the glass substrate to form a plurality of detection electrode patterns composed of a transparent conductive layer.

Since the glass substrate is chemically etched in the cut region to separate the glass substrates on which the detection electrode pattern and the pull-out line are formed, micro-cracking does not occur on the cut surface.

Since the detection electrode pattern and the pull-out wiring pattern are covered with an overcoat, the surface of the glass original plate is close to the flat surface, and the photoresist film is not unevenly formed on the surface of the glass substrate.

When the chemical etching in the step 5 is performed, the protective film and the photoresist film are laminated on the surface side of the detection electrode pattern and the drawn wiring pattern, so that the chemical polishing liquid does not intrude into the detection electrode pattern or pull out the wiring pattern.

The method for producing a glass substrate for a touch panel according to Item 2 of the present invention is characterized in that, in each of the glass substrate regions of the chemically strengthened glass original plate, the plurality of detection electrode patterns and the drawn wiring patterns are formed by the steps 1 and 2.

Even in the case of a chemically strengthened glass original plate, each glass substrate can be separated by chemical etching without applying a mechanical impact.

The method for producing a glass substrate for a touch panel according to Item 3 of the present invention, characterized in that the glass substrate region on the surface of the glass original plate is colored After the decorative layer, a plurality of detecting electrode patterns are formed by step 1.

A colored decorative layer is formed in one step on the plurality of glass substrates.

The method for producing a glass substrate for a touch panel according to Item 4 of the present invention is characterized in that a hollow character is formed on the colored decorative layer, and the drawn wiring pattern is formed so as to cover the hollow character.

The hollow text is colored by pulling out the color of the wiring pattern.

The method for producing a glass substrate for a touch panel according to claim 5, characterized in that aluminum or an alloy thereof is formed by laminating three layers of molybdenum or an alloy thereof to form a drawn wiring pattern.

Since the pull-out wiring pattern is formed of a three-layer structure of a conductive material which is excellent in acid resistance and conductivity, it is not easy to break even if the chemical polishing liquid intrudes.

The glass substrate for a touch panel of claim 6 is characterized in that it is produced by the manufacturing method according to claim 1.

It is separated from the original glass plate by chemical etching, so that micro-cracking does not occur around.

The glass substrate for a touch panel of claim 7 is characterized in that it is produced by the manufacturing method according to claim 5.

Since the pull-out wiring pattern is formed of a three-layer structure of a conductive material which is excellent in acid resistance and conductivity, it is not easy to break even if the chemical polishing liquid intrudes.

The glass substrate for a touch panel of claim 8 is characterized in that at least a part of the cut-out line is a curve.

A portion of the cut region along the cut line of the curve is chemically etched, one The partially curved profile of the glass substrate is separated by a glass original plate.

According to the inventions of the first and sixth aspects of the invention, the detection electrode pattern and the drawing line formed on the surface of the plurality of glass substrates can be integrally formed on one glass original plate, so that the glass substrate for the touch panel is mass-produced. The steps are simplified.

The photoresist film is formed on the surface side of the protective film close to the flat surface, so that voids or slits are not generated, and the photoresist film can be formed unevenly on the surface of the glass original plate, and the chemical polishing liquid does not pass during chemical etching. The voids or slits of the photoresist film invade.

Further, in the chemical etching, the detection electrode pattern and the pull-out wiring pattern are covered with a double-layered protective film and a photoresist film, so that the detection electrode pattern or the pull-out pattern is not oxidized by contact with the chemical polishing liquid. Damage to electrical conductivity.

Further, unlike the scribe line cutting in which the glass substrates are separated by the mechanical impact, the glass substrates are separated by chemical etching, so that the micro-cracks do not occur on the separated cut surfaces, and the thickness is reduced to A thickness of 1 mm or less may be a glass substrate having a specific strength.

In addition, since the glass substrate can be separated by chemical etching, the cut-out line that serves as the outline of each glass substrate can be any shape including a curved line, and the glass substrate for a touch panel can be made to meet the design requirements. shape.

According to the invention of claim 2, even with other glass substrates The glass substrate in which the detection electrode pattern and the pull-out line are integrally formed on the surface may be a glass substrate for a touch panel which is chemically strengthened and has excellent strength.

According to the invention of claim 3, the colored decorative layer may be printed on each of the glass substrates or the decorative film may not be attached, and the reciprocating glass substrate may be integrally formed with a colored decorative layer.

According to the invention of claim 4, the hollow character can be colored into an arbitrary color by pulling out the color of the wiring pattern.

According to the inventions of the fifth and seventh aspects of the invention, even if a small amount of chemical polishing liquid intrudes and contacts the drawn wiring pattern, the wire is not oxidized and broken, and the manufacturing productivity can be improved.

According to the invention of claim 8, since the glass substrate for a touch panel having an arbitrary outline shape can be obtained, the touch panel can be made into any shape that meets the design requirements.

Hereinafter, a glass substrate 1 for a touch panel according to an embodiment of the present invention and a method of manufacturing the same will be described with reference to FIGS. 1 to 6. The glass substrate for a touch panel is generally arranged in parallel with a display panel that is superimposed on a display panel such as a liquid crystal panel, and is used for detecting an input position of an input operation for an icon or the like displayed on the display panel. The specific configuration of the touch panel detection method in which the input position is detected differs. However, in the present embodiment, the static electricity at the input position is detected by the electrostatic capacitance change of the detection electrode pattern approached by the input operation body. The glass substrate 1 for a touch panel used in a capacitive touch panel will be described.

1 is a plan view of a glass substrate 1 for a touch panel. Hereinafter, the glass substrate portion of the glass substrate 1 for touch panel is simply referred to as a glass substrate 1', and the detection electrode pattern of the glass substrate 1' is formed as shown in FIG. The plane is described as a surface. As shown in the figure, the outline of the glass substrate 1 is a rectangular display panel that is vertically stacked on the lower side (bottom side), and has a vertically long rectangular shape and four rectangular corners. The design of the surface of the machine is continuous with a circular arc of 4 points. For the glass substrate 1', if it is a transparent glass, various kinds of glass such as borosilicate glass can be used, but here, it is a soda glass.

On the surface of the transparent glass substrate 1', a plurality of X detecting electrode patterns Xn composed of, for example, ITO (Indium Tin Oxide) of a transparent conductive material and a plurality of Y detecting electrode patterns Yn are formed in a manner of visually observing the lower display panel. The orthogonal XY directions are formed to intersect each other. The plurality of X detecting electrode patterns Xn are formed at equal intervals in the X direction, and each of the X detecting electrode patterns Xn is formed in a shape that is continuous in a rhombic shape in the Y direction. Further, a plurality of Y detecting electrode patterns Yn are formed at equal intervals in the Y direction, and each of the Y detecting electrode patterns Yn is formed in a shape continuous with a rhombic shape in the X direction. The diamond shape of the X detecting electrode pattern Xn and the diamond shape of the Y detecting electrode pattern Yn are complementary contours, that is, a plurality of X detecting electrode patterns Xn and a plurality of Y detecting electrode patterns Yn arranged orthogonally to each other to cover the rectangular shape Enter almost all of the operating area EA.

The portions where the X detecting electrode pattern Xn and the Y detecting electrode pattern Yn intersect each other have a narrow width of a rhombic corner, so that a small area is interposed. The intermediate insulating sheet 2 separates the X detecting electrode pattern Xn and the Y detecting electrode pattern Yn from each other up and down. The intermediate insulating sheet 2 is very small, and is formed of a transparent insulating material, so that it is not obvious at the time of visual inspection.

Each of the X detection electrode patterns Xn and the Y detection electrode patterns Yn is electrically connected to the pull-out wiring pattern (hereinafter referred to as a wiring pattern) 3 at the boundary of the input operation region EA, and the wiring pattern is pulled out in the lower left corner of FIG. The output portion of the third portion can electrically connect the detection circuit portion of the touch panel that detects the input position to the change in the electrostatic capacitance of the specific detection electrode patterns Xn and Yn. Here, the ITO constituting the detection electrode patterns Xn and Yn is higher in specific resistance than the normal metal, and therefore has a lower MAM than the ITO (layered Mo (molybdenum). Al (aluminium). The wiring pattern 3 is formed by the metal of the three-layer structure of Mo (molybdenum), and the combined resistance until the output is lowered, and the detection sensitivity is good. MAM is also excellent in acid resistance in comparison and has a three-layer structure. Therefore, even if a chemical polishing solution containing a fluoric acid is slightly contacted in a chemical etching step to be described later, it will not be completely broken, and the connection will not be damaged. Trustworthiness.

Since the wiring pattern 3 can be visually observed, so-called black frame printing is performed on the screen printing between the periphery of the input operation area EA and the outline of the glass substrate 1' with an opaque ink such as black, and the input of the colored decorative layer 6 is applied. A wiring pattern 3 is formed around the operation area EA to hide the wiring pattern 3. Further, as the black frame printing, a printing layer is formed by photolithography using a color photoresist ink, and so-called black matrix printing may be applied.

The detection electrode patterns Xn and Yn and the wiring pattern 3 formed on the surface of the glass substrate 1' are covered with a protective film 4 made of a transparent insulating material except for the entire output portion of the wiring pattern 3. The protective film 4 is formed to protect the conductive patterns Xn, Yn, and 3 from being exposed to the outside or being damaged by an external force, and is formed in the region of the glass substrate 1' including the input operation region EA. Therefore, it is formed using a transparent insulating material. Further, the glass substrate 1' of the present embodiment is chemically strengthened, and micro-cracking does not occur around the manufacturing process described later. Therefore, even if the thickness is 1 mm or less, specific strength can be obtained, and it is not necessary to be as before. A transparent protective panel may be laminated on the side of the input operation surface, or a scattering preventing film may be attached. On the other hand, the protective film 4 is formed of an insulating material containing yttrium oxide (SiO ₂ ), and also serves as an antireflection film.

As shown in FIG. 3 to FIG. 5, the glass substrate 1' is cut out to form each glass substrate from a glass original plate 10 of a size of nine glass substrates 1 for touch panels. Hereinafter, a step of manufacturing the glass substrate 1 for a touch panel will be described with reference to FIGS. 3 to 6 .

The glass original plate 10 is cut into a rectangular shape by a scribing method or the like from a larger glass original plate made of soda glass. As shown in FIG. 3, the outline of the cut glass original plate 10 is projected onto the front and back surfaces of the glass original plate 10, and the projection line is assumed to be a cut-out line CL on the cut-out line CL. In the surrounding area, the cutting area CA having a width of at least several mm is ensured, and the nine glass substrates 1' are arranged in a matrix shape without being overlapped with each other, and are in a rectangular shape circumscribing the whole. In other words, in the glass original plate 10, the region surrounded by the four-circle continuous cut line CL at the four corners of the rectangular shape is the glass substrate region of each of the glass substrates 1'.

First, the glass original plate 10 is placed in a molten salt of potassium nitrate heated to about 380 ° C to carry out chemical strengthening of ion exchange on the surface of the glass. By this chemical strengthening, each of the glass substrate 1 and the glass substrate 1' separated therefrom by the glass original plate 10 has a strength of about 5 times as compared with that before chemical strengthening.

Next, as shown in FIG. 3 and FIG. 6(a), black frame printing is performed using black ink between the periphery of each input operation area EA on the glass original plate 10 and the set cut line CL to form the colored decorative layer 6.

Then, the transparent conductive film 5' made of ITO is formed by sputtering on the entire surface of the glass original plate 10 on which the colored decorative layer 6 is formed, and the photoresist layer 7 is adhered to the transparent conductive film 5' through the roller coater. As shown in FIG. 6(b), the photoresist layer 7 exposes and develops a portion where the connecting conductor piece 5 is formed as a mask, and leaves the transparent conductive film 5' covered with a mask to etch the transparent conductive film, as shown in FIG. As shown in FIG. 6(c), a strip-shaped connecting conductor piece 5 is formed in a portion where the X detecting electrode pattern Xn and the Y detecting electrode pattern Yn intersect.

Further, as shown in FIG. 6(d), the intermediate insulating sheet 2 is formed across the connecting conductor piece 5 by the same photolithography method, screen printing or the like.

Next, an X detecting electrode pattern Xn and a Y detecting electrode pattern Yn are formed on the surface of the glass substrate 1'. The detection electrode patterns Xn and Yn are formed by patterning by photolithography, and transparent conductive layers made of ITO are formed by sputtering on the entire surface of the glass substrate 1' on which the intermediate insulating sheet 2 and the connecting conductor sheet 5 are formed. The film is superposed on the entire upper portion to adhere the photoresist layer. Thereafter, the photoresist layer of the portion where the exposure developing X detecting electrode pattern Xn and the diamond Y detecting electrode pattern Yn are formed forms a mask, and the etching is not covered by the mask. The conductive film forms the X detecting electrode pattern Xn and the Y detecting electrode pattern Yn. Thereby, the rhombic portions of the Y detecting electrode patterns Yn adjacent in the X direction of the rhombic are connected by the connecting conductor pieces 5, and the Y detecting electrode patterns Yn are formed along the X direction, and the X detecting electrode patterns Xn, between the diamonds The joint portion is formed on the intermediate insulating sheet 2, is insulated from the Y detecting electrode pattern Yn, and is formed along the Y direction.

As shown in FIGS. 5 and 6(e), each of the X detection electrode patterns Xn and the Y detection electrode patterns Yn is connected to the wiring pattern 3 composed of the MAM at the boundary of the input operation region EA. The wiring pattern 3 is formed around the input operation area EA to which black frame printing is applied by screen printing, sputtering using a mask, or the like, and is pulled out to the cut-out line CL in order to be connected to the external circuit at the output portion. The lower left side of the surrounded glass substrate 1'.

Next, as shown in FIG. 6(f), after the protective film 4 of the transparent material is not unevenly attached to the entire glass original plate 10 by a spin coater or the like, photolithography is performed to cover the detection electrode other than the glass substrate 1'. The pattern Xn, Yn and the wiring pattern 3 of the output portion are also slightly smaller than the entire circumference of the surface of the glass original plate 10 surrounded by the cut line CL (that is, the shape of the glass substrate 1'). The range of these forms the protective film 4. As shown in the figure, the unevenness on the surface of the original glass plate 10 caused by the formation of the detection electrode patterns Xn, Yn or the intermediate insulating sheet 2 is relaxed by the adhesion of the protective film 4 without unevenness, and is close to a plane.

The so-called sensing surface forming step from the chemical strengthening to the step of forming the protective film 4 can be performed on all of the nine glass substrates 1', so that the mass production step is greatly shortened.

Since the nine glass substrates 1' are separated from the glass original plate 10 by chemical etching, the fluorine-resistant acidic photoresist film 8 is adhered to the entire front and back surfaces of the glass original plate 10, except for the cut-off area CA which is defined by the cut-out line CL. The developed photoresist film 8 is exposed. The protective film 4 is generally formed of a material that does not have a fluorine-resistant acidity. Therefore, it is necessary to form the exposed photoresist film 8 so as to cover at least the entire surface of the protective film 4. The range of the photoresist film 8 is a protective film. The range of 4 is slightly larger across the entire circumference. By doing so, when the glass substrate 1' is separated by chemical etching, the protective film 4 can be prevented from being chemically attacked.

Thereafter, the photoresist film of the cut region CA which is not exposed by the alkali solution is removed, and as shown in FIG. 6(g), the region corresponding to the glass substrate 1' on the front and back surfaces is cured by photocuring the photoresist film 8. cover. The photo-cured photoresist film 8 is a film, and the protective film 4 is adhered to the surface of the glass original plate 10 which is close to the plane. Therefore, the step of the layer, the holes and the notches are not generated, and the entire surface of the protective film 4 is surely sealed.

Next, the glass original plate 10 is immersed in a chemical polishing liquid containing hydrofluoric acid, and the glass substrate 1' is separated from the glass original plate 10 by chemical etching to cut the region CA. In this chemical etching step, the sensor faces of the detecting electrode patterns Xn, Yn, and the like are formed, and the protective film 4 and the photoresist film 8 are overlaid, so that they are not chemically attacked by the chemical polishing liquid.

The photoresist film 8 adhered to the front and back surfaces of the glass substrate 1' separated from the glass original plate 10 is removed using an alkali solution, and the completed glass substrate 1 for a touch panel is obtained at the stage of removing the photoresist film 8. Further, only the photoresist film 8 is removed here, and the protective film 4 remains on the surface of the glass substrate 1. The detection electrode patterns Xn, Yn, and the like are protected by the protective film 4 thereby.

The above-described embodiment is described with respect to the glass substrate 1 for a touch panel used in a capacitive touch panel. However, the detection method of the input surface of the touch panel is different, and the sensing surface of the detection electrode pattern is included. The present invention can also be applied to a glass substrate for a touch panel which is different in manufacturing steps of the sensing surface. For example, a touch panel such as a resistance sensing method in which an XY detecting electrode pattern such as a resistance sensing method is interposed between the insulating electrodes and the like is interposed by a glass substrate for two touch panels manufactured by the present invention. The spacers are stacked such that the detection electrode patterns formed of the resistance layers face each other.

Further, the manufacturing step of forming the detecting electrode pattern or the sensing surface of the drawn wiring pattern on the surface of the glass substrate is not limited to the order described in the above embodiment, as long as the cutting region CA is chemically etched at least after the protective film 4 is formed. The order of manufacturing steps is different depending on the configuration of the detecting electrode pattern.

Further, although the drawn wiring pattern 3 is formed of MAM, it may be formed of another conductive material such as aluminum or silver. In addition, by Mo. Al. The MAM composed of the 3-layer structure of Mo can also be replaced by Mo or Mo alloy. Al or Al alloy. 3-layer structure of Mo or Mo alloy.

Further, the colored decorative layer 6 is provided with a hollow character, and a wiring pattern is formed thereon so as to cover a region of the hollow character, and the color of the wiring pattern is transmitted through the hollow character portion, and can be displayed by the front side of the glass substrate for the touch panel. Visually identifiable text. In particular, the colored decorative layer 6 is applied in a color tone close to black, and the contrast with the color of the wiring pattern (aluminum or silver) becomes large, and the hollow character display becomes conspicuous.

Further, if the chemical strengthening of the glass original plate 10 is performed without chemical strengthening, the thickness of the necessary strength can be obtained, and it is not necessary.

Further, it is not necessary to perform the black frame printing step, and the decorative film corresponding to the black frame printing may be covered on the glass substrate 1 for a touch panel manufactured by the present invention.

Further, the photoresist layer formed in each step, or the photoresist film, may be a film resist.

[Industry use possibility]

The present invention is applicable to a glass substrate for a touch panel which is required to be thinner and stronger, and a method of manufacturing the same.

1‧‧‧ glass substrate for touch panel

1'‧‧‧ glass substrate

3‧‧‧ Pull out the wiring pattern

4‧‧‧Protective film (overcoat)

8‧‧‧Photoresist film (Resist film)

10‧‧‧Glass original board

Xn‧‧‧X detection electrode pattern

Yn‧‧‧Y detection electrode pattern

CL‧‧‧ cut out the line

CA‧‧‧ cut area

Fig. 1 is a plan view showing a glass substrate 1 for a touch panel according to an embodiment of the present invention.

2] A longitudinal cross-sectional view is omitted in a portion along the line A-A of FIG. 1.

Fig. 3 is a plan view showing a glass original plate 10 on which a colored decorative layer 6 is printed on each glass substrate 1'.

4] A plan view of a glass original plate 10 forming a connecting conductor piece 5.

FIG. 5 is a plan view of the glass original plate 10 before the step of separating the glass substrate 1 for a touch panel.

6 shows a manufacturing step of the glass substrate 1 for a touch panel, and the steps of (a) printing the colored decorative layer 6 on the glass original plate 10, respectively. (b) a step of forming a mask for exposing and developing the photoresist layer 7 on the transparent conductive film 5', (c) forming a step of connecting the conductor sheets 5 to the glass original sheet 10, and (d) bridging the connecting conductor sheets 5 The step of forming the intermediate insulating sheet 2, (e) the step of forming the wiring pattern 3 and the detecting electrode patterns Xn, Yn, and (f) forming the protective film 4 covering the wiring pattern 3 and the detecting electrode patterns Xn, Yn on the glass original sheet 10. In the step of the surface, (g) the photo-curable film 8 is used to cover the region corresponding to the glass substrate 1' other than the cut region CA of the front and back surfaces of the glass original plate 10, and a cross-sectional view is partially omitted.

3‧‧‧ Pull out the wiring pattern

6‧‧‧Colored decorative layer

10‧‧‧Glass original board

Xn‧‧‧X detection electrode pattern

Yn‧‧‧Y detection electrode pattern

CL‧‧‧ cut out the line

CA‧‧‧ cut area

EA‧‧‧Input operation area

2‧‧‧Insulation sheet

4‧‧‧Protective film (overcoat)

5‧‧‧Conductor

5'‧‧‧Electrical film

7‧‧‧Photoresist layer

8‧‧‧Photoresist film (Resist film)

Claims (8)

A method for producing a glass substrate for a touch panel, characterized in that a plurality of first detecting electrode patterns and a plurality of second detecting electrode patterns each formed by a transparent conductive layer and intersecting each other are formed on a surface of a glass substrate, and a conductive connection is formed In the method of manufacturing the glass substrate for a touch panel in which the first detecting electrode pattern and the second detecting electrode pattern are insulated from each other by the intermediate insulating sheets formed at the intersecting portions, the first detecting electrode pattern and the second detecting electrode pattern are formed by the method of manufacturing the glass substrate for the touch panel. Separating the front and back surfaces of the glass original plate of the size of the plurality of glass substrates, and arbitrarily setting a cut-out line for projecting the outlines of the plurality of glass substrates toward the front and back surfaces, and the glass substrate regions surrounded by the cut lines on the surface of the glass original plate, a strip-shaped connecting conductor piece that is connected to the first detecting electrode pattern separated at each of the intersecting portions, the intermediate insulating sheet that straddles the connecting conductor piece, and a plurality of first detecting electrode patterns and plural numbers Step 1 of patterning the second detecting electrode pattern to form a plurality of detecting electrode patterns composed of a transparent conductive layer Step 2 of electrically connecting the drawn wiring patterns of the respective detecting electrode patterns in each of the glass substrate regions, and flattening the connecting conductor pieces and the intermediate insulating layer by covering the detecting electrode patterns and the drawn wiring patterns covering the respective glass substrate regions The intersection of the sheet and the second detection electrode pattern and the overcoat formed only on the other of the first detection electrode pattern and the second detection electrode pattern are formed on the surface of the glass original sheet. , on the front and back sides of the original glass plate on which the protective film is formed, except Step 4 of forming a photoresist film in addition to the cut region of the cut-out line, and step of chemically etching the cut regions on the front and back surfaces of the glass original plate using the photoresist film as a mask, and separating the glass substrates from the glass original plate 5, the step 6 of removing the photoresist film formed on both the front and back surfaces of the glass substrate; and the glass for touch panel formed by patterning the surface of the glass substrate to form a plurality of detection electrode patterns composed of a transparent conductive layer A method of manufacturing a substrate. The method for producing a glass substrate for a touch panel according to the first aspect of the invention, wherein the plurality of detection electrode patterns and the drawn wiring patterns are formed in each of the glass substrate regions of the chemically strengthened glass original plate by the steps 1 and 2. The method for producing a glass substrate for a touch panel according to the first or second aspect of the invention, wherein the colored decorative layer is formed on each of the glass substrate regions on the surface of the glass original plate, and then a plurality of detection electrode patterns are formed by the step 1. The method for producing a glass substrate for a touch panel according to the third aspect of the invention, wherein the colored decorative layer is formed with a hollow character, and the drawn wiring pattern is formed to cover the hollow character. The method for producing a glass substrate for a touch panel according to the first or second aspect of the invention, wherein the drawn wiring pattern is formed by laminating a three-layer structure in which aluminum or an alloy thereof is sandwiched by molybdenum or an alloy thereof. . A glass substrate for a touch panel, which is produced by the manufacturing method described in claim 1 or 2. A glass substrate for a touch panel, which is produced by the manufacturing method described in claim 5 of the patent application. The glass substrate for a touch panel according to claim 6 or 7, wherein at least a part of the cut-out line is a curve.