Printed circuit board having enhanced EMI suppression

Details Printed circuit board having enhanced EMI suppression Printed circuit board having enhanced EMI suppression

1994-03-30

1995-11-14

Picard, Leo P.

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

174250, 174 35R, 361816, H05K 100

Patent

active

054668930

ABSTRACT:
The radiation noise suppression effect is enhanced by providing an insulation layer which is formed so that the circuit pattern is covered excepting at least a part of power source pattern or ground pattern on the substrate on which circuit pattern is formed, and a conductive layer which is formed so as to be connected to the uninsulated part of the power source pattern or the ground pattern on the insulation layer, by modifying pattern shape of the conductive layer and the insulation layer or by increasing or reducing the number of these layers.

REFERENCES:
patent: 3366519 (1968-01-01), Pritchard, Jr. et al.
patent: 3437740 (1969-04-01), Rosenberg et al.
patent: 4141055 (1979-02-01), Berry et al.
patent: 4404489 (1983-09-01), Larson, III et al.
patent: 4801489 (1987-03-01), Nakagawa et al.
patent: 5025116 (1991-06-01), Kawakami et al.
patent: 5030800 (1991-07-01), Kawakami et al.

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