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:
Sep. 28, 2004
Filed:
Jan. 23, 2002
Joseph A. Yedinak, Mountaintop, PA (US);
Dwayne S. Reichl, Pocono Lake, PA (US);
Jack E. Wojslawowicz, Bayonne, NJ (US);
Bernard J. Czeck, Mocanaqua, PA (US);
Robert D. Baran, Plains, PA (US);
Douglas Lange, Mountaintop, PA (US);
Fairchild Semiconductor Corporation, South Portland, ME (US);
Abstract
An IGBT has striped cell with source stripes continuous or segmented along the length of the base stripe The opposite stripes are periodically connected together by the N+ contact regions to provide channel resistance along the width of the source stripes . For continuous stripes the resistance between two sequential contact areas is greatest in the middle and current concentrates near the source contact regions The wider the spacing between the contacts the larger the resistive drop to the midpoint between two N+ contacts