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A kind of graphene touch screen electrode and manufacturing method thereof

A production method and touch screen technology, which are applied in the fields of electrical digital data processing, instruments, and data processing input/output process, etc., can solve the problems of increased square resistance of graphene, desorption or damage of graphene film, and adhesion between graphene and substrate. Focus on problems such as insufficient efforts to achieve the effects of improved adhesion, low production cost, and high product yield

Active Publication Date: 2016-11-09
2D CARBON CHANGZHOU TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention: one is to complete the making of the electrodes around the touch screen by screen printing conductive paste, which solves the problem that the process of using graphene as the conductive layer in the production of the touch screen is not allowed to use screen printing to manufacture electrodes; the other is to solve In the process of preparing electrodes by silk printing method, the square resistance of graphene increases and the adhesion between graphene and substrate is not enough, which may easily cause desorption or damage of graphene film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0017] Take graphene film material, the number of layers is 3 layers; glass substrate; silver conductive paste.

[0018] The graphene film is transferred to the glass substrate, and then the silver conductive paste is screen-printed on the graphene film to make a graphene conductive electrode, and then the circuit diagram is generated by laser lithography, and the capacitive touch screen is formed after binding the FPC.

[0019] The process of silk-screening conductive paste is as follows: print the prepared conductive paste on the graphene film, and then after photo-curing with silver conductive paste, record the thickness of the line, and then screen-print protective oil on the paste to avoid exposure to in the air.

Embodiment 2）

[0021] Take graphene film material, the number of layers is 3 layers; film substrate; copper conductive paste.

[0022] The graphene film is transferred to the film substrate. In the process of transferring the traditional graphene film to the substrate, we change it by sandwiching a layer of cured material such as epoxy resin between the substrate and the graphene film. The specific operation is (1) evenly coat a layer of epoxy resin on the glass substrate, and then cover the growth substrate copper foil on the substrate coated with cured material; (2) roll the growth substrate and the substrate to make them stick (3) The epoxy resin is cured by light curing treatment; (4) The copper foil is removed by chemical etching.

[0023] Then screen-print copper conductive paste on the graphene film to make a graphene conductive electrode, and then chemically etch to generate a circuit pattern, which is bonded with the lens to form a capacitive touch screen.

[0024] The process of s...

Embodiment 3）

[0026] Take graphene film material, the number of layers is 3 layers; film substrate; copper conductive paste.

[0027] The graphene film is transferred to the film substrate. In the process of transferring the traditional graphene film to the substrate, we change it by sandwiching a layer of cured material such as polyurethane acrylate between the substrate and the graphene film. The specific operation is (1) evenly coat a layer of urethane acrylate on the film substrate, and then cover the growth substrate nickel foil on the substrate coated with cured material; (2) roll the growth substrate and the substrate to make them stick (3) The urethane acrylate is cured by baking curing treatment; (4) The nickel foil is removed by the bubble stripping method.

[0028] Then screen-print copper conductive paste on the graphene film to make a graphene conductive electrode, and then chemically etch to generate a circuit pattern, which is bonded with the lens to form a capacitive touch s...

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Abstract

The invention relates to a fabrication method for a graphene touch screen electrode. The fabrication method comprises the steps of 1) transferring a graphene film on a substrate; and 2) screen-printing conductive paste on the graphene film. By using a screen-printing method to fabricate the graphene electrode, the process is simple, the fabrication cost is lower and the rate of non-defective products is high; and by using curing materials, the adhering force of the graphene film relative to the substrate is enabled to be greatly improved, the change of the sheet resistance of the graphene is enabled to be small during the screen-printing of the electrode and the adhering force of the electrode also satisfies the requirement on the adhering force of the touch screen.

Description

technical field [0001] The invention relates to a touch screen electrode, in particular to a graphene touch screen electrode and a manufacturing method thereof. Background technique [0002] Transparent conductive films are an important part of electronic information products. The general requirements for transparent conductive films are that the sheet resistance should be as low as possible, and the light transmittance in the visible light range should be as high as possible. [0003] At present, the touch screen technology is developing vigorously, and the touch screen technology includes touch screens with sensing functions such as capacitive touch screens and resistive touch screens. The existing touch screen uses conductive and transparent ITO (indium tin oxide) coating on the substrate (including but not limited to glass, film, etc.), and then burns the circuit (processes include but not limited to etching, photolithography, etc.), and then Electrodes are arranged aro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 金虎李武祐卫国周振义彭鹏
Owner 2D CARBON CHANGZHOU TECH INC
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