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. 20, 1984
Filed:
Jul. 08, 1981
Applicant:
Inventors:
Alexander Colquhoun, Heilbronn-Sontheim, DE;
Erhard Kohn, Ithaca, NY (US);
Assignee:
Telefunken Electronic GmbH, Heilbronn, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 14 ; 357 15 ; 357 89 ;
Abstract
A variable capacitance diode comprises a low resistance semi-conductor substrate on which is epitaxially deposited three layers, a first layer adjacent the substrate having an impurity concentration which decreases towards the substrate, a very thin intermediate region and a relatively thin surface region of lower doping than the intermediate region, a barrier being formed on or in the outer surface of the relativey thin surface region. The invention also includes a method of making such a diode.