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Low-acidity acidic etching regenerant and acidic etching mother liquor thereof

An acid etching and regenerating agent technology, applied in the field of circuit board printing, can solve problems such as troubles, rapid equipment corrosion, and high odor in the working environment, and achieve the effects of reducing material consumption, prolonging equipment life, and improving working environment.

Active Publication Date: 2012-08-15
广州广合科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, acidic copper chloride etching system is usually used for acidic etching mother liquor. In order to ensure the continuous progress of etching, etching mother liquor must be regenerated; the existing regeneration system mainly uses H 2 o 2 and HCl, and at the same time control ORP (oxidation-reduction potential) and acid equivalent, and use professional etching equipment to complete automatic production; The deficiencies that plague production such as strong odor and rapid equipment corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: a kind of low-acid type acidic etch regeneration agent, comprises sodium chlorate 10%, sodium chloride 15%, ammonium chloride 0.15%, urea 0.5%, additive 1.1% (wherein contains 0.1% Thiourea and 1% diethanolamine), water 73.25%.

[0026] An acidic etching mother liquor, which is composed of the low-acid type acidic etching regeneration agent and industrial hydrochloric acid (31% by weight concentration), the volume ratio of the low-acid type acidic etching regeneration agent and industrial hydrochloric acid (37%) is 1:2 , per liter of low-acid type acidic etching regeneration agent and industrial hydrochloric acid mixture also contains 317.72g of copper chloride (150g of divalent copper ions).

Embodiment 2

[0027] Embodiment 2: a kind of low-acid type acidic etch regeneration agent, comprises the sodium chlorate 10.63%, sodium chloride 17%, ammonium chloride 0.17%, urea 0.7%, additive 1.5% (wherein contains 0.2% Thiourea and 1.3% triethanolamine), water 70%.

[0028] An acidic etching mother liquor, which is composed of the low-acid type acidic etching regeneration agent and industrial hydrochloric acid (33% by weight concentration), the volume ratio of the low-acid type acidic etching regeneration agent and industrial hydrochloric acid (37%) is 1:2.5 , also contains 296.54g cupric chloride (140g divalent cupric ion) in every liter of low-acid type acidic etching regeneration agent and industrial hydrochloric acid mixed solution.

Embodiment 3

[0029] Embodiment 3: a kind of low-acid type acidic etch regeneration agent, comprises sodium chlorate 12%, sodium chloride 16%, ammonium chloride 0.16%, urea 0.6%, additive 1.2% (wherein contains 0.1% Thiourea and 1.1% diethanolamine), water 70.04%.

[0030] An acidic etching mother liquor, which is composed of the low-acid type acidic etching regeneration agent and industrial hydrochloric acid (35% by weight concentration), the volume ratio of the low-acid type acidic etching regeneration agent and industrial hydrochloric acid (37%) is 1:2.8 , also contains 338.90g cupric chloride (160g divalent cupric ion) in every liter of low-acid type acidic etching regeneration agent and industrial hydrochloric acid mixed solution.

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PUM

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Abstract

The invention relates to the technical field of circuit board printing, particularly a low-acidity acidic etching regenerant and an acidic etching mother liquor thereof. The regenerant provided by the invention comprises the following components in percentage by weight: 10-12% of sodium chlorate, 15-17% of sodium chloride, 0.15-1.17% of ammonium chloride, 0.5-0.7% of urea, 1-1.5% of additive and 70-74% of water. The invention can perform the acidic etching under low acid equivalent, thereby ensuring the smoothness of the production, improving the working environment and prolonging the equipment life.

Description

technical field [0001] The invention relates to the technical field of circuit board printing, in particular to a low-acid acid etching regeneration agent and an acid etching mother liquor thereof. Background technique [0002] Printed circuit boards use chemical methods to remove unnecessary copper on the copper clad board to form the required circuit patterns. Therefore, etching is an indispensable and important process step in the production of PCB (printed circuit board) at present. At present, acidic copper chloride etching system is usually used for acidic etching mother liquor. In order to ensure the continuous progress of etching, etching mother liquor must be regenerated; the existing regeneration system mainly uses H 2 o 2 and HCl, and at the same time control ORP (oxidation-reduction potential) and acid equivalent, and use professional etching equipment to complete automatic production; The shortcomings of production are plagued by strong odor and fast corrosio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/46C23F1/18
Inventor 孙宝林肖红星
Owner 广州广合科技股份有限公司
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