JP3182091U - Capacitive touch panel - Google Patents

Abstract

Capacitance type touch panel having a simple layer structure, a thin touch panel, a simple manufacturing process and high manufacturing efficiency by directly bonding ITO tempered glass and ITO film with an optical adhesive. I will provide a.
A capacitive touch panel includes an ITO tempered glass 1 and an ITO film 2 which are bonded together by an optical adhesive. The ITO tempered glass includes a glass substrate 10 having a display area and a non-display area, a black ink layer 12 printed in an area corresponding to the non-display area on one side surface of the glass substrate, a black ink layer, An ITO circuit plating layer 14 covering the display area and a metal circuit layer 16 formed on the outer surface of the ITO circuit plating layer by a yellow light forming process are included. The ITO film 2 includes a base material layer 20, an ITO layer formed on one surface of the base material layer, and a conductive silver paste covered on the outside of the ITO layer. A conductive silver paste 24 of an ITO circuit plating layer is adhered to the outer surface of the substrate by an optical adhesive 3.
[Selection] Figure 1

Description

  The present invention relates to a touch panel, and more particularly to a capacitive touch panel.

  There are many types of capacitive touch panels currently in use, for example, the most commonly used GG (double-layer glass) structure, PG (PET / glass) structure, GFF (glass / FILM / FILM) structure, OGS (One glass) structure.

  The present applicant has discovered the following problems in the process of manufacturing / using a capacitive touch panel. The most commonly used capacitive touch panel with a GG structure uses a double-layer glass, and the adhesion rate and adhesion efficiency of the two hard glasses are low, resulting in high costs and a large thickness. Since the surface of the PG structure is made of a PET film and the hardness of the surface is low, the PG structure is easily scratched and is often limited by the structure. The GFF structure requires a two-layer ITO film and requires two bonding steps, resulting in high material cost and manufacturing cost, low yield rate and low efficiency, and bonded flexible printed circuit board (FPC). ) Also has a functional problem. In the OGS structure, since the yellow light forming process and the electrical connection process must be performed in the manufacturing process, the manufacturing efficiency is low and the cost is high.

  An object of the present invention is to provide a capacitive touch panel that has a simple structure, a low manufacturing cost, and a high manufacturing efficiency in order to solve the technical problems described above.

  In order to achieve the above object, the present invention provides a capacitive touch panel including an ITO tempered glass and an ITO film bonded together by an optical adhesive.

  In the capacitive touch panel, the ITO tempered glass includes a glass substrate having a display area and a non-display area, and a black ink layer printed in an area corresponding to the non-display area on one side surface of the glass substrate. And an ITO circuit plating layer covering the black ink layer and the display area, and a metal circuit layer further formed on the outer surface of the ITO circuit plating layer by a yellow light forming process.

  In the capacitive touch panel, the ITO film includes a base material layer, an ITO layer formed on one surface of the base material layer, and a conductive silver paste covered outside the ITO layer, and the ITO film The outer surface of the metal circuit layer of tempered glass and the conductive silver paste of the ITO circuit plating layer are bonded with an optical adhesive.

  In the capacitive touch panel, the ITO tempered glass includes a glass substrate having a display area and a non-display area, and a first black ink layer printed in an area corresponding to the non-display area on one side surface of the glass substrate; An ITO circuit plating layer plated in an area corresponding to the display area, a conductive silver paste covered outside the first black ink layer and connected to the ITO circuit plating layer by a conductive portion, and the conductive silver A second black ink layer covered on the outside of the paste.

  In the capacitive touch panel, the ITO film includes a base material layer, an ITO layer formed on one surface of the base material layer, and a conductive silver paste covered outside the ITO layer, The outer surface of the second black ink layer of the ITO tempered glass and the conductive silver paste of the ITO film are bonded with an optical adhesive.

  The capacitive touch panel of the present invention having the above-described structure can bring about the following effects. In the present invention, the ITO tempered glass and the ITO film are directly bonded by an optical adhesive, so that the layer structure is simple, the entire thickness of the touch panel is reduced, the manufacturing process is simple, and the manufacturing cost is reduced. There is an advantage that the manufacturing efficiency is high. The capacitance type touch panel of the present invention is thinner than the conventional GG structure and the GFF structure. Although it is thicker than the conventional OGS structure, it performs better than the conventional OGS structure.

It is a figure which shows the cross-sectional composition of the electrostatic capacitance type touch panel which concerns on one Example of this invention. It is a figure which shows the cross-sectional composition of the electrostatic capacitance type touch panel which concerns on the other Example of this invention.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings based on the embodiments of the present invention and the features in the embodiments.

  In the embodiment shown in FIG. 1, the capacitive touch panel of the present invention includes an ITO tempered glass 1 and an ITO film 2 which are bonded together by an optical adhesive 3.

  The ITO tempered glass 1 includes a glass substrate 10 having a display area and a non-display area, a black ink layer 12 printed in an area corresponding to the non-display area on one side surface of the glass substrate 10, and a black color. An ink layer 12 and an ITO circuit plating layer 14 covering the display area are included. On the outer surface of the ITO circuit plating layer 14, a metal circuit layer 16 formed in the yellow light forming process is further provided. The metal circuit layer 16 is arranged linearly so as not to completely cover the ITO circuit plating layer 14.

  The ITO film 2 includes a base material layer 20, an ITO layer 22 formed on one surface of the base material layer 20, and a conductive silver paste 24 covered outside the ITO layer 22.

  When the bonding process of this embodiment is performed, the outer surface of the ITO circuit plating layer 14 and the metal circuit layer 16 of the ITO reinforced glass 1 and the conductive silver paste 24 of the ITO film 2 are bonded by the optical adhesive 3.

  The manufacturing process of the capacitive touch panel according to the embodiment of FIG. 1 is as follows.

Step 1, printing a black ink layer 12 in an area corresponding to a non-display area on one side surface of the glass substrate 10;
Step 2, forming an ITO circuit plating layer 14 on the entire surface of the glass substrate 10 outside the black ink layer 12 so that the ITO circuit plating layer 14 completely covers the black ink layer 12 and the display area;
Step 3, by forming a yellow light, forming a metal circuit layer 16 on the ITO circuit plating layer 14 to obtain the ITO tempered glass 1;
Step 4, printing a back surface protective agent on the base material layer 20 of the ITO film 2 and performing a pre-shrink treatment;
Step 5, after acid-resistant ink printing on the substrate layer 20, etching is performed to form an ITO layer 22 with a pre-prepared ITO image;
Step 6, again printing the conductive silver paste 24 on the ITO layer 22 to obtain the ITO film 2;
Step 7, after applying the optical adhesive 3 on the ITO film 2, the ITO film 2 and the ITO tempered glass 1 are bonded together;
Step 8. After the flexible printed circuit board (FPC) is brought into close contact with the ITO reinforced glass 1 and ITO film 2 circuit, it is inspected and shipped.

  In the embodiment shown in FIG. 2, an ITO tempered glass 4 having a different structure is provided instead of the ITO tempered glass 1 of the embodiment of FIG. The structure of the ITO film 2 of this embodiment is the same as that of the ITO film of the embodiment of FIG. The ITO tempered glass 4 of the present embodiment includes a glass substrate 40 having a display area and a non-display area, a first black ink layer 42 printed in an area corresponding to the non-display area on one side surface of the glass substrate 40, An ITO circuit plating layer 44 plated in an area corresponding to the display area, and a conductive silver paste 46 covered outside the first black ink layer 42 and connected to the ITO circuit plating layer 44 by a conductive portion 45; And a second black ink layer 48 covered on the outside of the conductive silver paste 46. When carrying out the bonding step of this embodiment, the second black ink layer 48 of the ITO tempered glass 4 and the conductive silver paste 24 of the ITO film 2 are bonded by the optical adhesive 3.

The manufacturing process of the capacitive touch panel according to the embodiment of FIG. 2 is as follows.
Step 1, plating an ITO circuit plating layer 44 in an area corresponding to a display area on one side surface of the glass substrate 40;
Step 2, printing a first black ink layer 42 in an area corresponding to a non-display area on one side surface of the glass substrate 40;
Step 3, printing the conductive portion 45 in the area of the first black ink layer 42 approaching the ITO circuit plating layer 44;
Step 4, printing the conductive silver paste 46 on the outside of the first black ink layer 42;
Step 5, a second black ink layer 48 is further printed on the outside of the conductive silver paste 46.
Step 6, printing a back surface protective agent on the base material layer 20 of the ITO film 2 and performing a pre-shrinkage treatment;
Step 7, acid-resistant ink-printed on the substrate layer 20 and then etching to form an ITO layer 22 with a predetermined ITO image;
Step 8, further printing a conductive silver paste 24 on the ITO layer 22;
Step 9, after applying the optical adhesive 3 on the ITO film 2, the ITO film 2 and the ITO tempered glass 1 are bonded together;
Step 10. After the flexible printed circuit board (FPC) is brought into close contact with the circuit of the ITO reinforced glass 4 and the ITO film 2, it is inspected and shipped.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention. Therefore, the present invention is not limited to the configuration of the embodiments. It goes without saying that design changes and the like within a range not departing from the gist of the invention are included in the invention.

DESCRIPTION OF SYMBOLS 1 ITO tempered glass 2 ITO film 3 Optical adhesive 10 Glass substrate 12 Black ink layer 14 ITO circuit plating layer 16 Metal circuit layer 20 Base material layer 22 ITO layer 24 Conductive silver paste 4 ITO tempered glass 40 Glass substrate 42 1st black Ink layer 44 ITO circuit plating layer 46 Conductive silver paste 48 Second black ink layer

Claims (5)

  A capacitive touch panel comprising an ITO tempered glass and an ITO film bonded together by an optical adhesive.   The ITO tempered glass includes a glass substrate having a display area and a non-display area, a black ink layer printed in an area corresponding to a non-display area on one side surface of the glass substrate, a black ink layer, and a display area The capacitive touch panel according to claim 1, further comprising: an ITO circuit plating layer that covers the substrate and a metal circuit layer further formed on an outer surface of the ITO circuit plating layer by a yellow light forming step.   The ITO film includes a base material layer, an ITO layer formed on one surface of the base material layer, and a conductive silver paste covered outside the ITO layer, and the metal circuit layer of the ITO tempered glass; 3. The capacitive touch panel according to claim 2, wherein the outer surface of the ITO circuit plating layer and the conductive silver paste are bonded with an optical adhesive.   The ITO tempered glass includes a glass substrate having a display area and a non-display area, a first black ink layer printed in an area corresponding to the non-display area on one side surface of the glass substrate, and an area corresponding to the display area. An ITO circuit plating layer to be plated, a conductive silver paste covered outside the first black ink layer and connected to the ITO circuit plating layer by a conductive portion, and a second covered outside the conductive silver paste The capacitive touch panel according to claim 1, further comprising a black ink layer.   The ITO film includes a base material layer, an ITO layer formed on one surface of the base material layer, and a conductive silver paste covered on the outside of the ITO layer. 5. The capacitive touch panel according to claim 4, wherein the outer surface of the layer and the conductive silver paste of the ITO film are bonded by an optical adhesive.