JP5500515B2 - Manufacturing method of color filter substrate with touch panel electrode - Google Patents

Description

  The present invention relates to a method for manufacturing a color filter substrate with a touch panel electrode used in a liquid crystal display device with a touch panel.

  In recent years, a liquid crystal display device with a touch panel having a function of an input device has been widely used as a display device of various electronic devices such as a mobile phone and a portable game machine. This liquid crystal display device with a touch panel may be configured using, for example, a color filter substrate with a touch panel electrode having a touch panel electrode layer on one side of the glass substrate and a color filter layer on the other side. The color filter substrate with a touch panel electrode is produced, for example, by the following method.

  FIG. 2 is a cross-sectional view showing a conventional method for manufacturing a color filter substrate with a touch panel electrode.

  In order to manufacture the color filter substrate 101 with a touch panel electrode, first, as shown in (a), the touch panel electrode layer 103 is formed on one surface of the glass substrate 102. More specifically, the transparent electrode 131, the insulating film 141, and the transparent electrode 132 are sequentially stacked on the glass substrate 102 to form the transparent electrode 131 and the metal electrode 133 connected to the transparent electrode 132. Thereafter, an insulating film 142 is formed so as to cover the transparent electrode 132 and a part of the metal electrode 133. A portion of the metal electrode 133 that is not covered with the insulating film 142 is for connection to a control device (not shown).

  Next, as shown in (b), a protective film 106 is formed so as to cover the entire touch panel electrode layer 103. This protective film 106 is for preventing damage to the touch panel electrode 103 when the color filter layer 105 is formed.

  Next, as shown in (c), a color filter layer 105 is formed on the other surface of the glass substrate 102. The color filter layer 105 according to the illustrated example includes, for example, a colored layer 151, a black matrix 152, and a transparent electrode 153.

  Finally, when all of the protective film 106 is peeled and removed, the color filter 101 with a touch panel electrode shown in FIG.

JP 2008-9750 A

  In the conventional manufacturing method described above, a protective film formation and peeling step are indispensable. However, since the protective film itself is not necessary for the color filter substrate with a touch panel, there is a problem that the formation of the protective film and the peeling process increase the manufacturing cost.

  Therefore, an object of the present invention is to provide a manufacturing method capable of efficiently obtaining a color filter substrate with a touch panel electrode.

  The present invention provides at least one layer covering one or more transparent electrodes on one surface of a substrate, an electrode connected to the transparent electrode and disposed in a peripheral portion of the transparent electrode forming region, and an uppermost transparent electrode. The present invention relates to a method of manufacturing a color filter substrate with a touch panel electrode having a touch panel electrode layer laminated with a transparent insulating film and having a color filter layer on the other surface of the substrate. The color filter substrate with a touch panel electrode is formed on one surface of the substrate with a transparent electrode and an electrode disposed in a peripheral portion of the transparent electrode forming region, and a peripheral portion of the uppermost transparent electrode and the transparent electrode forming region. A transparent insulating film is formed so as to cover the entire surface of the electrode disposed on the substrate, a color filter layer is formed on the other surface of the substrate, and after the color filter is formed, the transparent electrode is disposed in the peripheral portion of the transparent electrode formation region. It is manufactured by selectively removing at least a part of the transparent insulating film covering the electrode.

  If the manufacturing method of the color filter substrate with a touch-panel electrode of this invention is used, a color filter substrate with a touch-panel electrode can be produced, without passing through extra processes, such as protective film formation and peeling. Thereby, reduction of manufacturing cost is realized.

Sectional drawing which shows the manufacturing method of the color filter substrate with a touch-panel electrode which concerns on embodiment of this invention. Sectional drawing which shows the conventional manufacturing method of the color filter substrate with a touch panel electrode

  FIG. 1 is a cross-sectional view illustrating a method for manufacturing a color filter substrate with a touch panel electrode according to an embodiment of the present invention.

  First, a touch panel electrode layer is formed on one surface of a glass substrate. More specifically, as shown in (a), the first transparent electrode 31 of the first layer, the first insulating film 41 of the second layer, and the second transparent of the third layer are formed on one surface of the glass substrate 2. The electrode 32 is laminated in order. Further, the metal electrode 33 connected to the first transparent electrode 31 and the second transparent electrode 32 is formed. The metal electrode 33 is disposed in the peripheral portion of the formation region of the first transparent electrode 31 and the second transparent electrode 32 on the glass substrate 2. The first transparent electrode 31 and the second transparent electrode 32 are made of, for example, ITO (Indium Tin Oxide) having a thickness of 100 to 2000 mm. The first insulating film 41 is made of, for example, a transparent acrylic resin having a thickness of 0.5 to 5.0 μm. The metal electrode 33 is formed of, for example, a silver alloy or a laminate of molybdenum and aluminum (Mo / Al / Mo).

  Next, as shown in (b), the second insulating film 42 is formed so as to cover the entire surface of the uppermost second transparent electrode 32 and the metal electrode 33. The second insulating film 42 is formed of, for example, a transparent acrylic resin having a thickness of 0.5 to 5.0 μm.

  Next, as shown in (c), the color filter layer 5 is formed on the other surface of the glass substrate 2. The color filter layer 5 is a layer including a black matrix 52 and colored layers 51 of red, green, and blue colors. In the example of FIG. 1, a transparent electrode 53 is further formed so as to cover the black matrix 52 and the colored layer 51. The colored layer 51 is made of, for example, an acrylic resin having a thickness of 0.5 to 3.0 μm in which pigments of various colors are dispersed. The black matrix is formed of, for example, an acrylic resin having a thickness of 0.5 to 3.0 μm in which a black pigment is dispersed or a metal film having a thickness of 100 to 2000 mm. The transparent electrode is made of, for example, ITO having a thickness of 100 to 2000 mm. When the color filter layer 5 is formed, the second insulating film 42 for insulating the second transparent electrode 32 also functions as a protective film for the metal electrode 33, so that the metal electrode 33 is prevented from being damaged.

  Finally, as shown in (d), at least part of the second transparent insulating film 42 covering the metal electrode 33 is selectively removed. The partial removal of the second transparent insulating film 42 can be performed by irradiating, for example, a short wavelength laser of 266 nm, 355 nm, or 532 nm, or a combination of these. However, the present invention is not limited thereto, and an optimal wavelength may be selected according to the type of the second insulating film 42. The portion of the metal electrode 33 from which the second insulating film 42 has been peeled is for connection to a control device (not shown).

  As described above, by covering the metal electrode 33 with the second transparent insulating film 42 that is a constituent member of the touch panel electrode layer 3 while forming the color filter layer 5, without forming a protective film separately, It becomes possible to form the color filter substrate 1 with a touch panel electrode. This reduces capital investment, material costs, utility costs, and labor costs. In addition, it is possible to reduce the loss generated in the formation and peeling process of the protective film and improve the yield. As a result, a reduction in manufacturing cost is realized.

  In the present embodiment, the stripe-shaped first transparent electrode 31 (first layer) and the stripe-shaped second transparent electrode 32 (third layer) cross each other with the first transparent insulating film 41 interposed therebetween. Although it is formed, it is not always necessary to divide the transparent electrode into two layers in this way, and the number and shape of the transparent electrode may be arbitrary. For example, the present invention can be applied to a configuration in which a plurality of transparent electrodes are arranged in the same layer and transparent electrodes aligned in a predetermined direction by jumper wirings or the like are connected. Even in this case, when the color filter layer is formed, the color filter substrate with a touch panel electrode can be efficiently produced by protecting the metal electrode with the transparent insulating film covering the transparent electrode located in the uppermost layer.

  In the present embodiment, for convenience of illustration, the second insulating film is formed up to the end of the glass substrate. However, if the second insulating film covers the entire uppermost transparent electrode and metal electrode, The formation range may be arbitrary.

  Furthermore, in this embodiment, the removal of the second transparent insulating film is performed by irradiating a laser. However, other than this, the second transparent insulating film can be selected without significantly increasing the number of necessary steps. For example, various techniques such as polishing can be adopted as long as they can be removed.

  The present invention can be used as a method for producing a color filter substrate in, for example, a liquid crystal display device with a touch panel.

DESCRIPTION OF SYMBOLS 1 Color filter substrate with a touch panel electrode 2 Glass substrate 3 Touch panel electrode layer 5 Color filter layer 31 1st transparent electrode 32 2nd transparent electrode 33 Metal electrode 41 1st transparent insulating film 42 2nd transparent insulating film 51 Colored layer 52 Black matrix 53 Transparent electrode

Claims (4)

One or more layers of transparent electrodes on one surface of the substrate, electrodes connected to the transparent electrodes and disposed in a peripheral portion of the transparent electrode forming region, and at least one layer covering the uppermost transparent electrode A method for producing a color filter substrate with a touch panel electrode having a touch panel electrode layer laminated with a transparent insulating film and having a color filter layer on the other surface of the substrate,
On one surface of the substrate, the transparent electrode and an electrode disposed in a peripheral portion of the transparent electrode forming region are formed,
Forming the transparent insulating film so as to cover the entire surface of the transparent electrode of the uppermost layer and the electrode disposed in the peripheral part of the formation region of the transparent electrode;
Forming the color filter layer on the other surface of the substrate;
A method for manufacturing a color filter substrate with a touch panel electrode, wherein after the formation of the color filter, at least a part of the transparent insulating film covering an electrode disposed in a peripheral portion of the transparent electrode forming region is selectively removed.   The method for manufacturing a color filter substrate with a touch panel electrode according to claim 1, wherein the substrate is a glass substrate.   3. The method for manufacturing a color filter substrate with a touch panel electrode according to claim 1, wherein an electrode disposed in a peripheral portion of the transparent electrode forming region is for connection to a control device.   The method for producing a color filter substrate with a touch panel electrode according to claim 1, wherein the removal of the second transparent insulating film is performed by irradiating a laser.

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