Semiconductor type gas sensor having two terminals

Details Semiconductor type gas sensor having two terminals Semiconductor type gas sensor having two terminals

1985-06-28

1987-08-18

Broome, Harold

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

H01L 700

Patent

active

046880143

ABSTRACT:
A gas senor having two terminals and comprising a heater having a positive temperature coefficient of resistance and a gas sensitive semiconductor covering the heater, connected to the heater at least at their opposite ends and having a negative temperature coefficient of resistance. The coefficients of the heater and the semiconductor are so selected as to offset each other in such a manner that a combined resistance of said heater and said semiconductor is maintained substantially constant at operation temperatures.

REFERENCES:
patent: 3901067 (1975-08-01), Boardman, Jr. et al.
patent: 4234542 (1980-11-01), Romine
patent: 4338281 (1982-07-01), Treitinger et al.
patent: 4396899 (1983-08-01), Ohno

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