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:
Jul. 28, 1981
Filed:
Nov. 05, 1979
Christianus J Van Opdorp, Eindhoven, NL;
Hendrik Veenvliet, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A semiconductor device and a method for manufacturing the semiconductor device are disclosed for forming an abrupt and accurately positioned p-n junction between a substrate and a substrate-adjoining region. This is achieved in accordance with the present invention by diffusing zinc or cadmium from a surface of the substrate-adjoining region to the substrate, and abruptly limiting or retarding the diffusion of the zinc or cadmium into the substrate near a junction between the substrate and the region. This is accomplished in accordance with the present invention by selecting the net donor concentration in the substrate near the junction to be higher than the concentration of zinc or cadmium at the surface of the substrate-adjoining region.