Water-soluble flux

Details Water-soluble flux Water-soluble flux

1992-05-29

1993-06-01

Rosenberg, Peter D.

Metal treatment

Compositions

Fluxing

148 24, 148 25, B23K 3534

Patent

active

052156028

ABSTRACT:
Disclosed is a water-soluble solder flux and a method of fabricating circuit boards which does not adversely affect the insulation resistance of the boards. The flux applied to the board comprises a vehicle including at least two random copolymers of polyalkylene glycol with various amounts of ethylene oxide and propylene oxide. The flux also exhibits a low viscosity for improved copper coverage.

REFERENCES:
patent: 3748191 (1973-07-01), Siegfried
patent: 4077815 (1978-03-01), Schuessler
patent: 4113524 (1978-09-01), Katz
patent: 4115157 (1978-09-01), Packer
patent: 4151015 (1979-04-01), Cooper
patent: 4216035 (1980-08-01), Bakos et al.
patent: 4478650 (1984-10-01), Zado
patent: 4940498 (1990-07-01), Rubin
patent: 5009724 (1991-04-01), Dodd et al.

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