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:
May. 04, 1976
Filed:
Oct. 11, 1974
Applicant:
Inventors:
Otto Kuhn, Lupfig, CH;
Samuel Schweitzer, Birr, CH;
Assignee:
BBC Brown Boveri & Company Limited, Baden, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B24C / ; B24C / ;
U.S. Cl.
CPC ...
51 1 / ; 51 / ; 51319 ;
Abstract
A method and apparatus for forming a groove in a semiconductor element with at least two junctions between regions of alternating opposite conduction types and different doping concentrations and with the semiconducting region enclosed between the junctions exhibiting a higher resistivity than either of the neighboring regions, the lateral surface of the element between the surface edges of the junctions being sloped by means of a groove cut by sand blasting.