Method of fabricating a circuit board and circuit board provided

Details Method of fabricating a circuit board and circuit board provided Method of fabricating a circuit board and circuit board provided

1982-09-30

1984-07-31

Kittle, John E.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making electrical device

430312, 430313, 430314, 430318, 430319, 204 15, 204 38A, 204 376, G03C 500

Patent

active

044630840

ABSTRACT:
A circuit board such as a code disk having a smooth contact surface and a minute pattern is fabricated by depositing an alumite film on an aluminum and selectively filling electrically nonconductive and conductive materials in the cells in the crystals of the alumite film.

REFERENCES:
patent: 2884571 (1959-04-01), Hannahs
patent: 3424658 (1969-01-01), Norton
patent: 3805023 (1974-04-01), Wainer et al.
patent: 4021592 (1977-05-01), Fromson
patent: 4225398 (1980-09-01), Hasegawa et al.
patent: 4293617 (1981-10-01), Nagy
patent: 4307147 (1981-12-01), Ohishi et al.
T. Saji et al., "Coloring of Anodized Al by AC Electrolysis in CuSO.sub.4 Solution," Plating and Surface Finishing, Nov. 1979, pp. 40-43.

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