Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1992-03-25
1993-03-23
Thompson, Gregory D.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361389, 361397, H05K 720
Patent
active
051969904
ABSTRACT:
A metal printed board having circuit conductors on the surface of an insulating plate layered on a metal plate, wherein grooves formed in the portions of the metal plate which face the circuit conductor. The electronic parts mounted conducts into the metal plate through the solder portions and the insulating plate just thereunder. Accordingly, the presence of the grooves little impairs the thermal conduction. The stray capacitance between the conductor circuit and the metal plate because of the formed grooves, is considerably reduced, so that the signal leakage and noise sneaking are minimized.
REFERENCES:
patent: 4374457 (1983-02-01), Wiech, Jr.
patent: 4931905 (1990-06-01), Cirrito et al.
Fuji Electric & Co., Ltd.
Thompson Gregory D.
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