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:
Sep. 28, 1999
Filed:
Dec. 22, 1997
Applicant:
Inventors:
Aparna Vaidyanthan, Carmel, IN (US);
Robert Keith Constable, Kokomo, IN (US);
Shailendra Verma, Indianapolis, IN (US);
Assignee:
Delco Electronics Corp., Kokomo, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
73777 ; 73780 ;
Abstract
A strain gauge has a stainless steel substrate with a dielectric coating comprising two dielectric layers. A circuit comprising conductors, resistors and piezoresistors in a Wheatstone bridge configuration is formed on the dielectric. One dielectric layer is to adhere to the steel and a second is to form a barrier against diffusion of the first layer into the piezoresistor material. An amplification and signal conditioning circuit is applied adjacent the bridge. The steel substrate is to be welded or bolted at its marginal portions to a structure subject to strain.