High-efficiency high-quality and safe alkaline cupric chloride etchant for printed circuit board

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United States of America Patent

PATENT NO 10087368
APP PUB NO 20150361341A1
SERIAL NO

14720990

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Abstract

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A high-efficiency high-quality and safe alkaline cupric chloride etchant for printed circuit board, which includes cupric chloride and a sub-etchant. The sub-etchant contains (in percentage by weight) 10%-30% NH4Cl; 0.0002%-25% carboxylic acid and/or ammonium carboxylate; 0.3%-25% ammonium hydroxide. The etchant is used in connection with an automatic detection and charging control during the etching process in order to keep the concentration of copper ions in the etchant no less than a set value.

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Patent Owner(s)

Patent OwnerAddress
YE TAOROOM 1808 ZHONGXIN BUILDING 268 BAOGANG AVENUE HAIZHU DISTRICT GUANGZHOU GUANGDONG 510230 GUANGZHOU CITY GUANGDONG PROVINCE 510230

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ye, Tao Guangzhou, CN 90 559

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