Aqueous acidic tin-lead immersion plating bath containing weak a

Details Aqueous acidic tin-lead immersion plating bath containing weak a Aqueous acidic tin-lead immersion plating bath containing weak a

1990-06-04

1994-08-02

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

427433, 427437, 427 97, 427 98, 205 85, C23C 1816, C23C 1852, C23C 1854

Patent

active

053342402

ABSTRACT:
Immersion tin-lead baths are provided, preferably free of hypophosphite ion, comprising a strongly acidic aqueous solution comprised of thiourea, water-soluble sources of divalent tin and lead, a weak acid, and a weak base.

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