a touch screen

Abstract

A touch screen comprises a display screen part and a touch part, wherein the touch part comprises two layers of transparent conductive films, an optical transparent gel layer and a protective layer, wherein the two layers of transparent conductive films are arranged on a base material, the optical transparent gel layer is sandwiched between the two layers of transparent conductive films, and the protective layer is arranged at the outermost layer of the touch part; each transparent conductive film comprises a substrate and a transmittance increase structure which is attached to the substrate; each transmittance increase structure comprises two dielectric layers which are arranged at the upper side and the lower side, a conductive metal layer which is arranged in the middle and two anti-oxidation metal layers which are respectively sandwiched between the conductive metal layer and the two dielectric layers, wherein the anti-oxidation metal layers are made of zinc or titanium. The total thickness of the transparent conductive films which are used by the touch screen is far smaller than the thickness of the existing ITO (Indium Tin Oxide) film, and excellent optical properties and electric properties are realized. Besides, the flexible base material can be selected, and large-scale and large-area production can be realized through a roll-to-roll magnetron sputtering method.

Description

technical field [0001] The invention relates to the field of touch display, in particular to a touch screen with a transparent conductive film having good optical properties and conductive properties. Background technique [0002] With the improvement of people's consumption level, feature phones are gradually transitioning to smart phones, and consumers' requirements for smart phone hardware performance are also constantly increasing. Therefore, the touch screen (touch panel, TP), which is an important part of the smart phone, is also developing rapidly. [0003] Touch screen technology is mainly divided into resistive, capacitive, infrared and surface acoustic wave methods, and capacitive touch screens are further divided into surface capacitive and inductive capacitive. The inductive capacitive touch screen has the advantages of real multi-touch, good transparency, good durability, and high resolution. It has become the mainstream technology of consumer electronic produc...

AI Technical Summary

Problems solved by technology

In addition, traditional ITO is used as the main material of the transparent conductive film, and the target material is expensive. Before coating, the surface of the flexible substrate needs to be hardened and coated with a refractive index matching layer. After coating, crystallization treatment is required, resulting in high production costs. Amplitude increase

A research group of Shanghai Jiaotong University proposed a three-layer structure of dielectric layer / metal layer / dielectric layer, with a thickness of less than 100nm and good conductivity and permeability. However, because the metal layer is easily oxidized, the service life Not high, there are still big problems in actual production and use (patent application number: 03116461.7)

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