Rust removal activating agent solution as well as preparation and use methods thereof

An activator and solution technology, applied in the field of activators, can solve the problems of production line production line design constraints, metal surface helplessness, parts or equipment corrosion, etc., to achieve fast rust removal and activation speed, wide applicability, and low acid gas volatilization speed effect

Inactive Publication Date: 2013-06-05
JIANGSU XIYAN SEMICON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of these acids to treat metal oxide layers is often not clean, especially on metal surfaces that are severely oxidized due to processing techniques or storage environments.
In addition, the immersion time required to immerse the metal substrate in these rust removal activators is more than 10 minutes, which restricts the production capacity and design of the production line; The volatilization of gas is likely to cause corrosion of nearby parts or equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] The rust removal activator solution of the present invention comprises 20% sulfuric acid, 3% hydrochloric acid, 20% potassium monopersulfate, 0.2% fatty alcohol polyoxyethylene ether, The rest is water.

[0019] The rust removal activator of the present invention is mainly based on sulfuric acid, adding hydrochloric acid to increase the dissolving ability of the rust removal activator to the oxide layer, because hydrochloric acid is a kind of reducing acid, and its metal salts are mostly soluble in water, so it can Cooperate with sulfuric acid to improve the dissolving ability of the oxide layer. Add fatty alcohol polyoxyethylene ether to improve the penetration ability of the rust removal activator in the oxide layer and the ability to inhibit the volatilization of acid gas: fatty alcohol polyoxyethylene ether can increase the wettability of the metal surface, so that the rust removal activator can be better Into the inside of the loose oxide layer and the dead corner...

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PUM

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Abstract

The invention provides a rust removal activating agent solution which is characterized by comprising the following components in percentage by weight: 15-40% of sulfuric acid, 2-20% of hydrochloric acid, 5-25% of potassium monopersulfate, 0.1-1% of fatty alcohol polyoxyethylene ether and the balance of water. The rust removal activating agent solution has the advantages of little hazard, wider applicability and high rust removal activating speed.

Description

technical field [0001] The invention relates to an activator, in particular to a rust removal activator, and also relates to a preparation method and a use method of the rust removal activator. Background technique [0002] Rust removal activator is a chemical product that removes the surface oxide layer of the metal substrate before electroplating such as semiconductor integrated circuit electroplating and connector electroplating. The operation method adopts high-speed continuous soaking, rack-type soaking, and drum-type soaking. At present, the rust removal activators commonly used in the electroplating industry mostly use dilute sulfuric acid, dilute hydrochloric acid or their mixtures. The use of these acids to treat metal oxide layers often removes impurities, especially on metal surfaces that are severely oxidized due to processing techniques or storage environments. In addition, the immersion time required to immerse the metal substrate in these rust removal activa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/02
Inventor 朱海良
Owner JIANGSU XIYAN SEMICON TECH
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