Apparatus for selectively coating part of a member

Details Apparatus for selectively coating part of a member Apparatus for selectively coating part of a member

1990-11-26

1992-03-31

Tufariello, T. M.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C25D 1700

Patent

active

051005247

ABSTRACT:
Apparatus for selectively coating part of a member with a material, such as plating the walls of a hole in a printed circuit board, may include two heads which, during operation of the apparatus, form a passageway between them through the hole. A pump alternately sucks and pumps liquid used in laying down the coating in both directions through the hole. Electrodes may be included in the heads to permit electroplating techniques to be applied in laying down the coating where the material is metallic.

REFERENCES:
patent: 3071521 (1963-11-01), Ehrhart
patent: 3424667 (1969-01-01), Frank
patent: 3644181 (1972-02-01), Donaldson
patent: 3798136 (1974-03-01), Olsen
patent: 4111761 (1978-09-01), LaBoda
patent: 4445978 (1984-05-01), Whartenby et al.
patent: 4514264 (1985-04-01), Piepers
patent: 4692222 (1987-09-01), Pellegrino et al.

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