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. 13, 2011
Filed:
Sep. 30, 2009
Kenichi Nishimura, Kyoto, JP;
Kenichi Nishimura, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A semiconductor device comprises a semiconductor substrate having a first semiconductor region of a first semiconductor type, a second semiconductor region of a second conductivity type extended in the first semiconductor region, and a mesa area forming a slope along an outer circumference of the semiconductor substrate; a first electrode provided on a first principal surface of the semiconductor substrate; and a second electrode provided on a second principal surface of the semiconductor substrate that is opposed to the first principal surface; wherein the second semiconductor region comprises a main region provided in the semiconductor substrate while being brought into contact with the first electrode, the main region including an annular portion and diffused portions arranged in a spread manner in an area surrounded by the annular portion; and wherein a portion of the first semiconductor region is interposed between the diffused portions and between the diffused portions and the annular portion; and the diffused portions are composed of a small pitch region and a large pitch region having a larger pitch than that of the small pitch region.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile