The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1987
Filed:
Jun. 28, 1985
Applicant:
Inventor:
Hisao Kitaguchi, Toyonaka, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
338 34 ;
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.