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:
Aug. 03, 2010
Filed:
Jul. 20, 2005
Christopher Harris, Täby, SE;
Cem Basceri, Reston, VA (US);
Christopher Harris, Täby, SE;
Cem Basceri, Reston, VA (US);
Cree Sweden AB, Kista, SE;
Abstract
A semiconductor device comprises a first layer () of a wide band gap semiconductor material doped according to a first conductivity type and a second layer () on top thereof designed to form a junction blocking current in the reverse biased state of the device at the interface to said first layer. The device comprises extension means for extending a termination of the junction laterally with respect to the lateral border () of the second layer. This extension means comprises a plurality of rings (-) in juxtaposition laterally surrounding said junction () and being arranged as seen in the lateral direction away from said junction alternatively a ring (-) of a semiconductor material of a second conductivity type opposite to that of said first layer and a ring (-) of a semi-insulating material.