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:
Dec. 29, 2009
Filed:
Aug. 28, 2007
Applicant:
Richard A. Rodrigues, Reading, GB;
Inventor:
Richard A. Rodrigues, Reading, GB;
Assignee:
Littelfuse, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/74 (2006.01);
U.S. Cl.
CPC ...
Abstract
A surge protection device with small-area buried regions () to minimize the device capacitance. The doped regions () are formed either in a semiconductor substrate (), or in an epitaxial layer (), and then an epitaxial layer () is formed thereover to bury the doped regions (). The small features of the buried regions () are maintained as such by minimizing high temperature and long duration processing of the chip. An emitter () is formed in the epitaxial layer ().
Rodrigues, Richard. (2009). Epitaxial surge protection device (U.S. Patent No. 7638816). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7638816
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile