Metal foil resistor

Details Metal foil resistor Metal foil resistor

1979-05-24

1981-10-27

Albritton, C. L.

Electrical resistors

Mechanically variable

Resistance value varied by removing or adding material

29620, 156649, 338275, 338308, 338329, H01C 1000

Patent

active

042976707

ABSTRACT:
A thin film foil resistor is disclosed wherein a thin metallic foil is bonded to an insulating substrate and a circuit path is formed on the foil by photographic artwork-etching techniques. After the circuit is formed, the structure is subjected to another etching process to reduce the thickness of the foil circuit thereby adjusting the value of the resistor. Terminal lands of the circuit are electroplated and the connecting leads are soldered to the lands. The value of the resistor is finally adjusted by use of a laser beam, and the resistor is encapuslated.

REFERENCES:
patent: 1962438 (1934-06-01), Flanzer et al.
patent: 2019457 (1935-10-01), Lodge
patent: 3517436 (1970-06-01), Zandman et al.
patent: 3530573 (1970-09-01), Helgeland
patent: 3649944 (1972-03-01), Caddock
patent: 3824521 (1974-07-01), Horii et al.
patent: 3860465 (1975-01-01), Matzner et al.
patent: 3896284 (1975-07-01), Holmes
patent: 3996551 (1976-12-01), Croson
patent: 4132971 (1979-06-01), Caddock, Jr.
patent: 4157529 (1979-06-01), Prieskorn

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