Acid tin-silver alloy electroplating bath and method for electro

Details Acid tin-silver alloy electroplating bath and method for electro Acid tin-silver alloy electroplating bath and method for electro

1997-08-29

1999-06-15

Mayekar, Kishor

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly alloy coating

205254, 106 123, 106 126, C25D 346, C23C 1800

Patent

active

059118660

ABSTRACT:
The invention relates to an acid tin-silver alloy plating bath which comprises tin ions, silver ions, one compound selected from the group consisting of aromatic thiol compounds and aromatic sulfide compounds, substantially non-cyanide and a balance of water, the pH of the bath being not higher than 2. According to this acid bath, tin and silver can be kept dissolved in the bath in a stable state for a long period of time even at a high temperature and a predetermined plating capacity is kept for a long period of time even though the bath is free from cyanide.

REFERENCES:
patent: 5514261 (1996-05-01), Herklotz et al.
patent: 5549810 (1996-08-01), Herklotz et al.
patent: 5601696 (1997-02-01), Asakawa

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