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. 26, 2002
Filed:
Aug. 30, 2001
Harvey C. Nathanson, Pittsburgh, PA (US);
Philip C. Smith, Ellicott City, MD (US);
R. Chris Clarke, Sykesville, MD (US);
David M. Krafcsik, Crownsville, MD (US);
Lawrence E. Dickens, Baltimore, MD (US);
Northrop Grumman Corporation, Baltimore, MD (US);
Abstract
A solid state microwave switch having a plurality of adjacent parallel fingers covered with an oxide layer. One end of a finger is an N+ source region while the other end is an N+ drain region, with a current conducting N region between them. The oxide layer is covered with a gate layer to which a gate signal is applied for control of current between the N+ regions through the N region. The gate layer is highly resistive and has a sheet resistance on the order of millions of ohms per square. The length from the source to drain region is around 2 &mgr;m, and the fingers are spaced with a pitch of around 1 &mgr;m.