Tin-lead immersion bath

Details Tin-lead immersion bath Tin-lead immersion bath

C - Chemistry, Metallurgy

23

C

6/4, 117/77

C23C 30/00 (2006.01) C23C 2/08 (2006.01) C23C 18/48 (2006.01) H05K 3/34 (2006.01)

Patent

CA 2035579

ABSTRACT OF THE DISCLOSURE 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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