A kind of etchant for touch screen and preparation method thereof

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

Inactive Publication Date: 2016-01-13
JIANGXI PINGBO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The commonly used ITO etching solution in the prior art is mainly made of hydrochloric acid or nitric acid, FeCl3, pure water and additives, which are mixed and filtered through stirring, but the etching speed of the etching solution is fast, the amount of side etching is large, the etching solution is unstable, and 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 a 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 70mL

[0050] Hydrogen peroxide 40mL

[0051] Cetylpyridinium chloride 0.1mL

[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-acetoxye...

Embodiment 2

[0060] A kind of etching liquid for touch screen, every liter of etching liquid is made up of following raw materials:

[0061] Hydrochloric acid 200mL

[0062] Sodium dihydrogen phosphate 10g

[0063] Hydrofluoric acid 80mL

[0064] Hydrogen peroxide 45mL

[0065] Cetylpyridinium chloride 0.5mL

[0066] 4-methyl-5-(2-acetoxyethyl)thiazole 5mL

[0067] The balance is water.

[0068] 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%.

[0069] A preparation method of etching liquid for touch screen, it comprises the following preparation steps:

[0070] 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;

[0071] B. Stir hydrochloric acid, hydrofluoric acid, hydrogen peroxide, cetylpyridinium chloride, 4-methyl-5-(2-acetox...

Embodiment 3

[0074] A kind of etching liquid for touch screen, every liter of etching liquid is made up of following raw material:

[0075] Hydrochloric acid 190mL

[0076] Sodium dihydrogen phosphate 14g

[0077] Hydrofluoric acid 82mL

[0078] Hydrogen peroxide 46mL

[0079] Cetylpyridine Chloride 0.8mL

[0080] 4-methyl-5-(2-acetoxyethyl)thiazole 6mL

[0081] The balance is water.

[0082] 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%.

[0083] A preparation method of etching liquid for touch screen, it comprises the following preparation steps:

[0084] 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;

[0085] B. Stir hydrochloric acid, hydrofluoric acid, hydrogen peroxide, cetylpyridinium chloride, 4-methyl-5-(2-acetoxyethy...

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PUM

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Abstract

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. Each liter of the etching solution consists of the following raw materials: 180-220 mL of hydrochloric acid, 5-20 g of sodium dihydrogen phosphate, 70-90 mL of hydrofluoric acid, Hydrogen peroxide 40-50mL, 4-methyl-5-(2-acetoxyethyl)thiazole 3-7mL, cetylpyridinium chloride 0.1-1mL, the balance is water. The present invention replaces ferric chloride with hydrofluoric acid and hydrogen peroxide, so there is no need to frequently replace the etching solution, which not only saves resources but also reduces pollution to the environment. Used in conjunction with sodium dihydrogen phosphate, hydrochloric acid, hydrofluoric acid, and hydrogen peroxide, the etching is stable, the etching speed is moderate, and the etching is uniform. The edges of the etched electrode pattern are neat and there is basically no side etching.

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. The indium tin oxide (ITO) conductive film used in the 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 i...

Claims

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Application Information

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