Electricity: electrical systems and devices – Electrostatic capacitors – Variable
Patent
1981-05-07
1983-10-04
Goldberg, Elliot A.
Electricity: electrical systems and devices
Electrostatic capacitors
Variable
361278, H01G 506
Patent
active
044082533
ABSTRACT:
A variable capacitor, wherein at least one of its stator or rotor electrode is made of aluminum alloy or copper alloy and coated with a thin dielectric material layer containing fluorocarbon resin as its principal component by means of baking, is disclosed. The disclosed variable capacitor is particularly suited for a miniaturization of an appliance which adopts this variable capacitor. Careful qualification of the electrode materials, dielectric material, additional dielectric substance, and conditions for performing the baking and layer forming operation prevent the formation of the oxide film over the surface of the electrode material, and thus ensures a firm adherence of the layer to the substrate and a large maximum capacitance of the layer.
REFERENCES:
patent: 1174600 (1916-03-01), Murdock
patent: 1533611 (1923-04-01), Respess
patent: 2619443 (1952-11-01), Robinson
patent: 3854181 (1974-12-01), Matsuware
patent: 3898540 (1975-08-01), Brensthaler
Ikeda Masaki
Nishino Atsushi
Ohtani Tadashi
Suzuki Tadashi
Goldberg Elliot A.
Matsushita Electric - Industrial Co., Ltd.
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