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. 21, 2009
Filed:
May. 25, 2006
Yasushi Urakami, Tokai, JP;
Jun Sakakibara, Anjo, JP;
Hitoshi Yamaguchi, Nisshin, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A semiconductor device includes: a semiconductor substrate; an element region having a semiconductor element including an impurity layer and a trench, wherein the impurity layer is disposed in the trench, and wherein the trench is disposed on a main surface of the substrate; and a field region disposed around the element region. The trench is an aggregation of a plurality of stripe line trenches so that the element region has a polygonal shape. The field region includes a dummy trench disposed along with one side of the polygonal shape on a periphery of the element region. The dummy trench has a width and a longitudinal direction, which are equal to those of the trench. The field region further includes an impurity layer disposed in the dummy trench.