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:
Jun. 27, 2006
Filed:
May. 13, 2003
Katsumi Nakamura, Sanda, JP;
Tadaharu Minato, Kobe, JP;
Shuuichi Tominaga, Karatsu, JP;
Katsuomi Shiozawa, Kobe, JP;
Katsumi Nakamura, Sanda, JP;
Tadaharu Minato, Kobe, JP;
Shuuichi Tominaga, Karatsu, JP;
Katsuomi Shiozawa, Kobe, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A semiconductor device that includes an insulating substrate, a plurality of semiconductor layers arranged to be isolated from one another on the insulating substrate, and a semiconductor element independently provided on the semiconductor layers. Further, a trench may extend from the main surface to the substrate and have an inner wall covered with an insulating film. At least one of an edge on the side of the substrate and an edge on the side opposite thereof of the semiconductor layer has a rounded surface. Further, an angle between a line tangent to a surface having a smallest radius of curvature of the rounded surface of the edge and the main surface ranges from 30° to 60° at a section of the edge.