发明授权
US5118394A Electroplating bath containing citric acid or citrate for tin or tin
alloy plating
失效
含有柠檬酸或柠檬酸盐的电镀浴用于锡或锡合金电镀
- 专利标题： Electroplating bath containing citric acid or citrate for tin or tin alloy plating
- 专利标题（中）： 含有柠檬酸或柠檬酸盐的电镀浴用于锡或锡合金电镀
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申请号： US622741申请日： 1990-12-05
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公开(公告)号： US5118394A公开(公告)日： 1992-06-02
- 发明人: Toshiaki Makino , Atsuyoshi Maeda
- 申请人： Toshiaki Makino , Atsuyoshi Maeda
- 申请人地址： JPX
- 专利权人： Murata Manufacturing Co., Ltd.
- 当前专利权人： Murata Manufacturing Co., Ltd.
- 当前专利权人地址： JPX
- 优先权： JPX1-317328 19891205
- 主分类号： C25D3/32
- IPC分类号： C25D3/32 ; C25D3/60
摘要：
A brightener is added in the ratio of 0.5-5 g per 1 l of electric plating bath of pH 4-8 containing citric acid or citrate for tin or tin alloy plating. The brightener contains a water soluble reaction product obtained by reacting polyamine such as pentaethylenehexamine, aliphatic aldehyde such as formaldehyde, and aromatic carboxylic acid such as methyl benzoate.
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