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:
May. 02, 2017
Filed:
Feb. 26, 2008
Applicants:
Qingchun Zhang, Cary, NC (US);
Charlotte Jonas, Morrisville, NC (US);
Anant K. Agarwal, Chapel Hill, NC (US);
Inventors:
Qingchun Zhang, Cary, NC (US);
Charlotte Jonas, Morrisville, NC (US);
Anant K. Agarwal, Chapel Hill, NC (US);
Assignee:
Cree, Inc., Durham, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 31/0312 (2006.01); H01L 29/06 (2006.01); H01L 29/16 (2006.01); H01L 29/872 (2006.01);
U.S. Cl.
CPC ...
H01L 29/0619 (2013.01); H01L 29/063 (2013.01); H01L 29/1608 (2013.01); H01L 29/872 (2013.01);
Abstract
Edge termination structures for semiconductor devices are provided including a plurality of spaced apart concentric floating guard rings in a semiconductor layer that at least partially surround a semiconductor junction. The spaced apart concentric floating guard rings have a highly doped portion and a lightly doped portion. Related methods of fabricating devices are also provided herein.