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Etching solution for touch screen and preparation method thereof

An etching solution and touch screen technology, applied in the field of etching solution, can solve the problems of difficulty in controlling the etching angle and metal layer etching amount, unstable etching solution, and large side etching amount, etc., and achieve stable etching, moderate etching speed, and electrode pattern edge. neat effect

Inactive Publication Date: 2015-02-04
JIANGXI PINGBO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The ITO etching solution commonly used in the prior art is mainly made of hydrochloric acid or nitric acid, FeCl3, pure water and additives, which are mixed and filtered by stirring, but the etching solution The etching speed is fast, the amount of side etching is large, the etching solution is unstable, it is difficult to control the etching angle and the etching amount of the metal layer, and because the etching solution contains FeCl3, the etching solution needs to be replaced frequently, which not only causes waste of resources, but also causes environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of etching liquid for touch screen, every liter of etching liquid is made up of following raw material:

[0047] Hydrochloric acid 180mL

[0048] Sodium dihydrogen phosphate 5g

[0049] Hydrofluoric acid 70 mL

[0050] Hydrogen peroxide 40mL

[0051] Cetylpyridinium chloride 0.1 mL

[0052] 4-methyl-5-(2-acetoxyethyl)thiazole 3mL

[0053] The balance is water.

[0054] The mass percent concentration of the hydrochloric acid is 38%, the mass percent concentration of the hydrofluoric acid is 36%, and the mass percent concentration of the hydrogen peroxide is 30%.

[0055] A preparation method of etching liquid for touch screen, it comprises the following preparation steps:

[0056] A. Dissolve the sodium dihydrogen phosphate in the formula amount in pure water to obtain an aqueous solution of sodium dihydrogen phosphate for subsequent use;

[0057] B. Stir hydrochloric acid, hydrofluoric acid, hydrogen peroxide, cetylpyridinium chloride, 4-methyl-5-(2-acetox...

Embodiment 2

[0061] A kind of etching liquid for touch screen, every liter of etching liquid is made up of following raw material:

[0062] Hydrochloric acid 200 mL

[0063] Sodium dihydrogen phosphate 10g

[0064] Hydrofluoric acid 80 mL

[0065] Hydrogen peroxide 45mL

[0066] Cetylpyridinium Chloride 0.5mL

[0067] 4-methyl-5-(2-acetoxyethyl)thiazole 5mL

[0068] The balance is water.

[0069] The mass percent concentration of the hydrochloric acid is 38%, the mass percent concentration of the hydrofluoric acid is 36%, and the mass percent concentration of the hydrogen peroxide is 30%.

[0070] A preparation method of etching liquid for touch screen, it comprises the following preparation steps:

[0071] A. Dissolve the sodium dihydrogen phosphate in the formula amount in pure water to obtain an aqueous solution of sodium dihydrogen phosphate for subsequent use;

[0072] B. Stir hydrochloric acid, hydrofluoric acid, hydrogen peroxide, cetylpyridinium chloride, 4-methyl-5-(2-aceto...

Embodiment 3

[0075] A kind of etching liquid for touch screen, every liter of etching liquid is made up of following raw material:

[0076] Hydrochloric acid 190mL

[0077] Sodium dihydrogen phosphate 14g

[0078] Hydrofluoric acid 82 mL

[0079] Hydrogen peroxide 46mL

[0080] Cetylpyridinium chloride 0.8 mL

[0081] 4-methyl-5-(2-acetoxyethyl)thiazole 6mL

[0082] The balance is water.

[0083] The mass percent concentration of the hydrochloric acid is 38%, the mass percent concentration of the hydrofluoric acid is 36%, and the mass percent concentration of the hydrogen peroxide is 30%.

[0084] A preparation method of etching liquid for touch screen, it comprises the following preparation steps:

[0085] A. Dissolve the sodium dihydrogen phosphate in the formula amount in pure water to obtain an aqueous solution of sodium dihydrogen phosphate for subsequent use;

[0086] B. Stir hydrochloric acid, hydrofluoric acid, hydrogen peroxide, cetylpyridinium chloride, 4-methyl-5-(2-acetoxy...

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Abstract

The invention relates to the technical field of etching solutions and particularly relates to an etching solution for a touch screen and a preparation method thereof. Each liter of the etching solution consists of following raw materials: 180-220ml of hydrochloric acid, 5-20g of sodium dihydrogen phosphate, 70-90ml of hydrofluoric acid, 40-50ml of hydrogen peroxide, 3-7ml of 4-methyl-5-(2-acetoxylethyl)thiazole, 0.1-1ml of hexadecylpyridinium chloride and the balance water. In the invention, ferric trichloride is replaced by the hydrofluoric acid and the hydrogen peroxide so that the etching solution is free from being changed frequently, thereby not only saving resources but also reducing environmental pollution. Meanwhile, with addition of the hexadecylpyridinium chloride and the sodium dihydrogen phosphate having a slowly-releasing effect with combination of the hydrochloric acid, the hydrofluoric acid and the hydrogen peroxide, the etching solution is stable in etching, is moderated in etching, is uniform in etching, allows edges of the shape of an electrode to be tidy and is basically free of a side-erosion phenomenon.

Description

technical field [0001] The invention relates to the technical field of etching solution, in particular to an etching solution for a touch screen and a preparation method thereof. Background technique [0002] With the rapid development of information technology and flat display technology, the application of touch screens is becoming more and more common. As large as information query systems in public places, as small as personal computers, tablet computers, and mobile phones, touch screens are closely related to our lives. Indium tin oxide (ITO) conductive film for touch screen has many advantages such as low resistivity, good light transmission, good high temperature stability and simple preparation and graphics processing technology. It is an ideal transparent electrode material and is widely used in Used as a transparent electrode on flat panel displays such as LCD, PDP, FED, OLED / PLED, etc. [0003] In order to prepare the required electrode pattern, it is necessary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K13/08
Inventor 李林波
Owner JIANGXI PINGBO ELECTRONICS
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