Resistance element with improved linearity and method of making

Details Resistance element with improved linearity and method of making Resistance element with improved linearity and method of making

1976-02-06

1977-06-28

Albritton, C. L.

Electrical resistors

Mechanically variable

Resistance value varied by removing or adding material

29620, 338174, H01C 1000

Patent

active

040328813

ABSTRACT:
A highly accurate resistance element formed by depositing a plurality of conductive pads at spaced intervals along a substrate, depositing the resistance element in intimate electrical contact with the pads, sensing the electrical resistance between successive pairs of pads, and trimming away resistance material from the element between selected pairs of pads until predetermined resistance values between each pair are achieved. In a preferred embodiment a portion of each pad is offset from the resistance element and adapted to receive a probe from a laser trimmer. The element can be advantageously employed in potentiometers.

REFERENCES:
patent: 2632831 (1953-03-01), Pritikin et al.
patent: 3111639 (1963-11-01), Ploke
patent: 3772631 (1973-11-01), Owen
patent: 3821845 (1974-07-01), Kukee et al.
patent: 3889223 (1975-06-01), Sella et al.

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