Compound resistor manufacturing method

Details Compound resistor manufacturing method Compound resistor manufacturing method

1987-12-31

1990-03-13

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

296101, 21912169, H01C 702, H01C 704

Patent

active

049073419

ABSTRACT:
This invention relates to a proces of manufacturing and adjusting a compound resistor. The compound resistor is formed of a resistive material forming a predominant portion of the resistance and having a small negative temperature coefficient of resistance coupled with an adjustment material having an extremely low resistance and a very high positive temperature coefficient of resistance. After forming the resistive and adjustment portions, a portion of the adjustment material is removed to adjust the composite TCR of the compound resistor substantially to zero without significantly affecting resistance.

REFERENCES:
patent: 3601889 (1971-08-01), Kaneoya et al.
patent: 3768157 (1973-10-01), Buie
patent: 3947801 (1976-03-01), Bube
patent: 4079349 (1978-03-01), Dorfield
patent: 4104607 (1978-08-01), Jones
patent: 4375056 (1983-02-01), Baxter et al.
patent: 4464646 (1984-08-01), Burger et al.
patent: 4582976 (1986-04-01), Merrick
patent: 4626822 (1986-12-01), Melkeraaen
36th Electronic Components Conference, Seattle, Wash., May 5-17, 2986; pp. 206-208, IEEE, Collins et al.; "Ultra Low T.C.R. Thin Multilayer Resistor System".

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