Method of making a precision resistor with improved temperature

Details Method of making a precision resistor with improved temperature Method of making a precision resistor with improved temperature

1982-03-01

1984-06-26

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29593, 29620, H01C 1700

Patent

active

044557442

ABSTRACT:
A precision resistor using a resistance metal film etched into a long serpentine strip cemented to a substrate. This substrate is a composite of rigid materials and plastics. The composite thermal coefficient of expansion of the substrate is given a non-linearity which in turn induces a stress related non-linear resistance change in the cemented film when the temperature changes. This stress-induced non-linear change is of approximately the same shape as the inherent non-linearity of the resistance versus temperature of the metal film, but opposite in polarity, over a wide range of resistor operating temperatures. Over the range, a much closer approximation to complete temperature compensation is obtained than previously.

REFERENCES:
patent: 3517436 (1970-06-01), Zandman et al.
patent: 3934058 (1976-01-01), Seebacher
patent: 4104607 (1978-08-01), Jones
patent: 4322456 (1982-03-01), Martin

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