Constant temperature coefficient thick film thermistor
AssigneeBeckman Instruments, Inc.
InventorCasimir W. Kazmierowicz
Life of this patent
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Abstract
A thermistor material which, when screened and fired upon ceramic substrates by thick film techniques, exhibits a substantially constant temperature coefficient of electrical resistance. The thermistor composition or ink, before screening, comprises from 30 to 80% by weight of an oxide of vanadium VO.sub.X, where X varies from 1.5 to 2.5, mixed with 70 to 20% by weight of a glass frit.
Claims10
A thermistor material composition comprising 30-80% by weight VO.sub.X where X varies from 1.5 to 1.9, and 70-20% by weight of glass.
A thermistor material having a substantially constant temperature coefficient of resistance over the range of 10.degree.C to 90.degree.C comprising
- 30-80% by weight VO.sub.X, where X varies from 1.5 to 1.9 and 70-20% by weight of glass.
A method of making a thermistor having a substantially constant temperature coefficient of resistance over the range of 10.degree.C to 90.degree.C comprising
- preparing a thermistor material composition comprising 30-80% by weight VO.sub.X where X varies from 1.5 to 1.9 and 70-20% by weight of glass,
- applying and firing said composition to a ceramic substrate to form a thermistor.
Dependencies are inferred from the claim text.