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:
Nov. 30, 2004
Filed:
Dec. 28, 2001
Applicant:
Inventors:
John Q. Walker, Colorado Springs, CO (US);
Todd A. Randazzo, Colorado Springs, CO (US);
Assignee:
LSI Logic Corporation, Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/993 ;
U.S. Cl.
CPC ...
H01L 2/993 ;
Abstract
A varactor is formed with a semiconductor junction having a retrograde dopant concentration profile in a depletion region. The retrograde dopant concentration profile results in an approximately linear capacitance/voltage characteristic response of the varactor. The retrograde dopant concentration profile also enables a peak of the dopant concentration to function as a low resistance conductive path connecting to the varactor.