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. 09, 1977
Filed:
Aug. 24, 1976
Applicant:
Inventors:
Joseph E Johnson, Churchill, PA (US);
John A Ostop, Greensburg, PA (US);
Assignee:
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
148187 ; 29583 ; 148186 ;
Abstract
A plurality of discrete transistor devices are produced on a semiconductor wafer and isolated from one another by moat etching. A passivation layer is then deposited in the moats separating the discrete transistor devices. The semiconductor wafer is then scribed and broken along lines delineated by the moats. The disclosed method permits testing of each discrete transistor device prior to separation from the wafer.