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A flexible copper grid-based touch screen and its preparation method

A copper mesh grid, touch screen technology, applied in instruments, computing, electrical and digital data processing, etc., can solve the problems of high reflectivity, increased touch screen cost, reduced touch screen flexibility, etc., to achieve high transmittance, low resistance, and strong environmental resistance. performance, the effect of reducing reflected light

Active Publication Date: 2022-04-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, PET itself has a high reflectivity in the visible light region. After being made into a touch screen, the graphic fidelity of the touch screen is significantly reduced. reduces the weight of the touch screen and reduces its flexibility of the touch screen

Method used

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  • A flexible copper grid-based touch screen and its preparation method
  • A flexible copper grid-based touch screen and its preparation method
  • A flexible copper grid-based touch screen and its preparation method

Examples

Experimental program
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Embodiment 1

[0027] Such as figure 1 As shown, this figure shows an embodiment of a flexible copper grid base touch screen, and the composite film includes optical glue 1, flexible transparent polyethylene terephthalate PET substrate film 2, anti-reflection and anti-reflection layers 13 and 14 and copper grid conductive layer 15.

[0028]The transparent film substrate 2 is composed of flexible transparent polyethylene terephthalate and its double-sided UV-cured polyacrylate hard coating. Preferably, the thickness of the flexible transparent substrate 2 is 50 microns, and may also be 125 microns. The UV-cured polyacrylate hardening coating is evenly coated on both sides of the flexible transparent PET substrate by a traditional roll-to-roll coating method, so as to improve the strength, hardness and durability of the flexible transparent substrate 2 .

[0029] The anti-reflection and anti-reflection layers 13 and 14 are multi-layer stacked structures covering the upper and lower surfaces ...

Embodiment 2

[0035] Such as figure 2 As shown, this figure shows an embodiment of a flexible copper grid base touch screen, and the composite film includes optical glue 1, flexible transparent polyethylene terephthalate PET substrate film 2, anti-reflection and anti-reflection layers 23 and 24 and copper grid conductive layer 25.

[0036] The transparent film substrate 2 is composed of flexible transparent polyethylene terephthalate and its double-sided UV-cured polyacrylate hard coating. Preferably, the thickness of the flexible transparent substrate 2 is 50 microns, and may also be 125 microns. The UV-cured polyacrylate hardening coating is evenly coated on both sides of the flexible transparent PET substrate by a traditional roll-to-roll coating method, so as to improve the strength, hardness and durability of the flexible transparent substrate 2 .

[0037] The anti-reflection and anti-reflection layers (23 and 24) are multi-layer stacked structures, covering the upper and lower surf...

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Abstract

The invention relates to the field of optical thin films, and relates to a flexible copper grid-based touch screen and a preparation method. Flexible copper grid-based conductive film and optical glue, the flexible copper grid-based conductive film includes a flexible transparent substrate, an anti-reflection and anti-reflection layer, and a copper grid conductive layer; The anti-reflection layer improves the transmittance of the substrate and reduces the reflected light on the surface, and then sputters a copper metal conductive composite layer on the surface of the anti-reflection and anti-reflection layer on one side; the copper metal conductive layer is etched by photolithography Prepare a transparent conductive film with high transmittance and low resistance; use optical glue to bond two transparent conductive films with the same structure, make the copper grid layer contact with the optical glue, and obtain an electrode structure for a touch screen. The visible light transmittance of the present invention is higher than 98%, the surface square resistance is lower than 6Ω / □, the chromaticity value b* is less than 0.3, the reflectivity of the copper film surface is lower than 4%, and the copper film backside (PET film is not coated film measurement) The reflectivity is less than 5%. The reflectivity of the touch screen surface is lower than 0.5%.

Description

technical field [0001] The invention relates to the field of optical thin films, and relates to a flexible copper grid-based touch screen and a preparation method. Background technique [0002] Transparent conductive films are an essential component in the manufacture of devices such as flat-screen TVs, touch screens, smart window panes, light-emitting diodes, and photovoltaic cells. In recent years, with the development of information (such as touch display), energy (such as photovoltaics, smart window glass) and other industries, people's demand for transparent conductive films has increased sharply, and among transparent conductive films, the most widely used The second type is tin-doped indium oxide thin film, commonly known as ITO thin film. As we all know, the content of indium in the earth's crust is rare (about 0.05ppm), and it is difficult to purify. With the significant increase in the amount of ITO thin film, its content is getting rarer and rarer, resulting in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/044G06F2203/04103
Inventor 刘宏燕颜悦刘伟明望咏林伍建华
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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