Semiconductor device

Details Semiconductor device Semiconductor device

2009-09-30

2011-12-13

Richards, N Drew (Department: 2895)

Active solid-state devices (e.g., transistors, solid-state diode

Regenerative type switching device

With means to increase breakdown voltage

C257S487000, C257SE29012

Reexamination Certificate

active

08076695

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.

REFERENCES:
patent: 5473169 (1995-12-01), Ker et al.
patent: 5838050 (1998-11-01), Ker et al.
patent: 6291114 (2001-09-01), Reijers
patent: 6855970 (2005-02-01), Hatakeyama et al.
patent: 6927345 (2005-08-01), Wu et al.
patent: 7105927 (2006-09-01), Lee
patent: 7238991 (2007-07-01), Kuroda et al.
patent: 7274077 (2007-09-01), Henninger et al.
patent: 7675127 (2010-03-01), Worley
patent: 7709931 (2010-05-01), Torii
patent: 2007/0228505 (2007-10-01), Mazzola et al.
patent: 2008/0029838 (2008-02-01), Zhang et al.
patent: 2008/0179624 (2008-07-01), Russ et al.
patent: 2005-183605 (2005-07-01), None
patent: 2008-130622 (2008-06-01), None

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