Single-layer externally hanging touch panel and manufacturing method thereof and liquid crystal display

Abstract

The invention discloses a single-layer externally hanging touch panel and a manufacturing method thereof, and a liquid crystal display. The method comprises the following steps: forming a black matrix pattern (BM Pattern), which is positioned in a non-visual region of a screen on the surface of a substrate; forming a first film on the surface, on which the BM Pattern is formed, of the substrate, wherein the first film is made of transparent material and the baking temperature of the transparent material is lower than the lowest volatilization temperature of the material forming the BM Pattern; forming an isolating film and a spattering metal layer on the surface of the first film sequentially, wherein the isolating film is made of transparent conductive material and the transparent conductive material is not volatized at high temperature of the spattering metal layer; and etching the metal layer and the isolating film to form a metal pattern and an isolating pad respectively. The first film, the isolating film and the spattering metal layer are formed sequentially, so that a chamber of spattering equipment and the touch panel are not polluted.

Description

technical field [0001] The invention relates to the field of touch screen manufacturing, in particular to a single-layer external touch screen, a manufacturing method thereof, and a liquid crystal display. Background technique [0002] At present, the touch screen technology develops rapidly, and has gradually developed into a commonly used technology in the field of touch control and liquid crystal display. According to the structure, the touch screen can be divided into the following three types: Add On Mode Touch Panel, On Cell Touch Panel and In Cell Touch Panel. Therefore, in the field of liquid crystal displays, most of them use external touch screens. [0003] The original plug-in touch screen has a two-layer substrate structure, which is the cover glass Cover Glass that protects the screen on the outer layer and the Touch Panel Glass that senses touch points on the inner layer. However, with the rapid development of liquid crystal display technology and consumers' ...

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Problems solved by technology

[0007] 2. The BM Pattern 102 formed by the photolithography process has a slope-shaped first step difference portion 112 in the parts located in the visible area of ​​the screen and the non-visible area of ​​the screen. Correspondingly, the insulating layer 105 also has a slope-shaped first step difference. Two-stage difference part 113, in the subsequent process, discontinuous ITO trace 106 and continuous type ITO trace 107 will be formed on the surface of the second stage difference part 113, if the first stage difference part 112 formed by photolithography is too steep, the corresponding second The steepness of the step difference part 113 will also be relatively large, which will easily lead to disconnection of the discontinuous ITO Trace 106 and continuous ITO Trace 107 formed along its surface, thereby affecting the corresponding data transmission function;

[0008] 3. When the insulating layer 105 is made by sputtering a layer of silicon nitride or silicon dioxide material on the cover glass 101 formed with the BM Pattern 102, due to the high temperature of the silicon nitride or silicon dioxide material used, it will also Causes volatilization of BM material, which in turn leads to contamination of the chamber of the sputtering equipment and the touch screen itself

The above various defects have brought more difficulties to the process of making a single-layer external touch screen in the current liquid crystal display technology field.

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