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:
Jul. 23, 2013
Filed:
Oct. 27, 2011
Joseph A. Yedinak, Mountain Top, PA (US);
Mark L. Rinehimer, Mountain Top, PA (US);
Thomas E. Grebs, Mountain Top, PA (US);
John L. Benjamin, Mountain Top, PA (US);
Joseph A. Yedinak, Mountain Top, PA (US);
Mark L. Rinehimer, Mountain Top, PA (US);
Thomas E. Grebs, Mountain Top, PA (US);
John L. Benjamin, Mountain Top, PA (US);
Fairchild Semiconductor Corporation, South Portland, ME (US);
Abstract
Disclosed are semiconductor devices and methods of making semiconductor devices. An exemplary embodiment comprises a semiconductor layer of a first conductivity type having a first surface, a second surface, and a graded net doping concentration of the first conductivity type within a portion of the semiconductor layer. The graded portion is located adjacent to the top surface of the semiconductor layer, and the graded net doping concentration therein decreasing in value with distance from the top surface of the semiconductor layer. The exemplary device also comprises an electrode disposed at the first surface of the semiconductor layer and adjacent to the graded portion.