Additives for electroplating compositions and methods for their

Details Additives for electroplating compositions and methods for their Additives for electroplating compositions and methods for their

1990-05-07

1991-01-01

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 356, C25D 360

Patent

active

049815644

ABSTRACT:
Heteroaromatic compounds having at least two nitrogen atoms may be used to regulate consistency of alloy content and of deposit thickness. Modified nonionic surfactants which lack terminal hydroxy groups are used as grain refiners having low tendency to cause foam build-up in electroplating baths. Dioxolanes may be used to produce deposits having, as desired, a white uniform matte, a semi-bright plate, or a mirror bright surface. Antioxidants are used to prevent oxidation of divalent tin.

REFERENCES:
patent: 2457152 (1948-12-01), Hoffman
patent: 4000047 (1976-12-01), Ostrow
patent: 4139425 (1979-02-01), Nickles
patent: 4459185 (1984-07-01), Obata et al.
patent: 4871429 (1989-10-01), Nobel et al.
patent: 4923576 (1990-05-01), Kroll et al.
patent: A0172267 (1984-08-01), EPX European Pat. Off.
Chemical Abstracts, vol. 106, Apr. 1987, p. 515, Abstract No. 110014x (A. Kostash, et al.)
Chemical Abstracts, vol. 110, 1989, p. 560, Abstract No. 143504t, (S. Lahiri, et al.).

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