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:
Mar. 10, 1981
Filed:
Sep. 10, 1979
Applicant:
Inventors:
Assignee:
BBC Brown Boveri & Company Limited, Baden, CH;
Primary Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
51324 ; 51235 ;
Abstract
A method for the production of a disk-shaped silicon semiconductor component with at least two adjoining zones of opposite type conductivity and different doping strengths using a lapping disk which includes the steps of positioning and semi-conductor component adjacent the lapping disk, subjecting the semiconductor disk to a suction pressure on its side opposite the lapping disk so as to be bowed up from an initial lapping plane with a radius of curvature corresponding to a desired angle, lapping the semiconductor disk with the rotating lapping disk and beveling off the bounding surface of the semiconductor disk opposite the plane of a pn-junction separating the two zones.