Microetch neutralizer chemistry for Ni—Au plating defect elimination

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12195870
APP PUB NO 20220074067A1
SERIAL NO

17466749

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Abstract

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A neutralizing composition comprising ascorbic acid as a reducing agent, citric acid as a chelator and a pH adjusting agent applied to microetched copper substrates bussed to stainless steel, which have been cleaned with an agent comprising permanganate ions. Unlike the prior art neutralizing agents comprising oxalic acid, which leave insoluble residue on the surface of the copper substrate, the present neutralizing composition leaves no residue and acts quickly. A surprising reduction in defects of Ni—Au plated copper substrates is achieved by utilization of the neutralization composition in a manufacturing process.

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Patent Owner(s)

Patent OwnerAddress
HUTCHINSON TECHNOLOGY INCORPORATED40 WEST HIGHLAND PARK DRIVE N E HUTCHINSON MN 55350-9784

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brouchous, David A Hutchinson, US 1 0
Pesavento, Paul V Hutchinson, US 19 119
Riemer, Douglas P Waconia, US 35 146

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