Tin whisker-free tin or tin alloy plated article and coating technique thereof
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United States of America Patent
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Sep 25, 1990
Grant Date -
N/A
app pub date -
Jun 8, 1989
filing date -
Jun 16, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A tin or tin alloy plated article, particularly a film carrier which is protected against the generation of tin whiskers characterized in having an indium plated layer on the substrate thereof and a tin or tin alloy plated layer on said indium plated layer. There are also disclosed a coating process therefor as well as a novel and unique electroless indium plating bath therefor, said indium plating bath is an acidic, electroless plating bath characterized by including an indium salt and thiourea or a derivative thereof.
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