Temperature sensor element and temperature sensor including the

Details Temperature sensor element and temperature sensor including the Temperature sensor element and temperature sensor including the

1997-11-14

2000-06-27

Easthom, Karl

Electrical resistors

Resistance value responsive to a condition

Ambient temperature

338 28, H01L 702

Patent

active

06081182&

ABSTRACT:
The present invention provides a temperature sensor element having excellent heat resistance, quick heat response, stable resistance, and high reliability with a less variation in resistance against time. The temperature sensor element includes a thermo-sensitive film mainly composed of a heat sensitive material having electrical resistance varies depending on the temperature; a pair of electrode films arranged to measure the electrical resistance in the direction of the thickness of the thermo-sensitive film, a base plate mainly composed of a heat-resistant insulating material for supporting the thermo-sensitive film and the electrode films, an anti-diffusion film interposed between the thermo-sensitive film and the electrode film in the vicinity of the base plate, and a film mainly composed of a heat-resistant insulating material for covering the thermo-sensitive film and the electrode films except the lead-connecting terminals of the electrode films. The thermo-sensitive film is composed of an oxide of corundum crystalline structure represented by the formula of (Al.sub.1-x-y Cr.sub.x Fe.sub.y).sub.2 O.sub.3, where 0.05.ltoreq.x+y.ltoreq.0.95, and 0.ltoreq.y/(x+y).ltoreq.0.6, and the anti-diffusion film is composed of an oxide of corundum crystalline structure represented by the formula of (Al.sub.1-x-y Cr.sub.x Fe.sub.y).sub.2 O.sub.3, where 0.ltoreq.x+y.ltoreq.0.95.

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European Search Report from European Counterpart Application No. EP 97309279 dated Feb. 17, 1998 (1 Page).

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