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:
Jul. 06, 1982
Filed:
Apr. 16, 1981
Applicant:
Inventors:
Ludwig Treitinger, Munich, DE;
Peter Tischer, Strasslach, DE;
Brigitte Schneider-Gmelch, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
422 98 ; 2323 / ; 73 2 / ; 324 / ; 338 34 ;
Abstract
A thin film semiconductor gas sensor including a metal oxide semiconductor sensor layer whose electrical resistance changes in dependence upon the nature and concentration of a gas being detected and having a heating element integrated therewith is improved by forming the sensor from a semiconductor body having a shell zone located relatively close to an outer surface of such body and being doped to the point of degeneration, with two spaced apart metal contact strips being positioned on such doped shell zone for connection with a current source to heat the sensor.