Printed circuit board having electromagnetic wave shield layer a

Details Printed circuit board having electromagnetic wave shield layer a Printed circuit board having electromagnetic wave shield layer a

1991-11-12

1993-12-14

Picard, Leo P.

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

174 35R, H05K 100

Patent

active

052704939

ABSTRACT:
A multi-layer printed circuit board with self-contained printed resistors includes an undercoat layer made of an insulating material and formed on an outermost conductor circuit at least except for a ground portion of the outermost conductor circuit; an electro-magnetic wave shield layer made of a cured copper paste and formed on the undercoat layer and the ground portion of the outermost conductor circuit so as to cover a generally entire surface of the outermost conductor circuit; and protective overcoat covering an outer surface of the shield layer.

REFERENCES:
patent: 3366519 (1968-01-01), Pritchard, Jr. et al.
patent: 4801489 (1989-01-01), Nakagawa et al.
patent: 4821007 (1989-04-01), Fields et al.
patent: 4945323 (1990-07-01), Gerstenberg et al.
patent: 4973799 (1990-11-01), Soma et al.
patent: 5025116 (1991-06-01), Kawakami et al.
patent: 5030800 (1991-07-01), Kawakami et al.
patent: 5032694 (1991-07-01), Ishihara et al.

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