发明授权
- 专利标题： Chromium-zinc anti-tarnish coating for copper foil
- 专利标题（中）： 用于铜箔的铬 - 锌抗反射涂层
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申请号： US855380申请日： 1992-03-20
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公开(公告)号： US5230932A公开(公告)日： 1993-07-27
- 发明人: Szuchain F. Chen , Nina Yukov , Lifun Lin , Chung-Yao Chao
- 申请人： Szuchain F. Chen , Nina Yukov , Lifun Lin , Chung-Yao Chao
- 申请人地址： CT New Haven
- 专利权人： Olin Corporation
- 当前专利权人： Olin Corporation
- 当前专利权人地址： CT New Haven
- 主分类号： H05K3/24
- IPC分类号： H05K3/24 ; H05K3/38
摘要：
A technique for improving the tarnish and oxidation resistance of copper and copper based ally material is disclosed. The material is electrolytically coated by immersion in an aqueous electrolyte containing sodium hydroxide, zinc ions and chromium (VI) ions. The deposited coating is a codeposited layer of zinc and chromium with a zinc to chromium ratio of from about 5:1 to about 12:1. The coating provides tarnish resistance at temperatures in excess of 190.degree. C. and is removable by immersion in sulfuric acid.
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