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:
Apr. 25, 1978
Filed:
Oct. 24, 1975
Fritz Scheidel, Munich, DT;
Siemens Aktiengesellschaft, Munich, DT;
Abstract
A semiconductor device is described having a body of silicon semiconductor material containing at least one PN junction therein, which PN junction terminates at a peripheral edge surface of the body. A double-layer passivating and protective coating is applied to the edge of the body covering the portion where the PN junction emerges. The inner layer consists of SiO.sub.2 and a predetermined percentage of Al.sub.2 O.sub.3. The outer layer consists of SiO.sub.2 and a predetermined percentage of Al.sub.2 O.sub.3 which exceeds the percentage of Al.sub.2 O.sub.3 in the inner layer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile