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. 02, 2013
Filed:
Nov. 15, 2011
Norihito Tokura, Okazaki, JP;
Satoshi Shiraki, Toyohashi, JP;
Shigeki Takahashi, Okazaki, JP;
Shinya Sakurai, Obu, JP;
Takashi Suzuki, Toyota, JP;
Norihito Tokura, Okazaki, JP;
Satoshi Shiraki, Toyohashi, JP;
Shigeki Takahashi, Okazaki, JP;
Shinya Sakurai, Obu, JP;
Takashi Suzuki, Toyota, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A diode has a semiconductor layer and cathode and anode electrodes on a surface of the semiconductor layer. The semiconductor layer has cathode and anode regions respectively contacting the cathode and anode electrodes. The anode region has a first diffusion region having high surface concentration, a second diffusion region having intermediate surface concentration, and a third diffusion region having low surface concentration. The first diffusion region is covered with the second and third diffusion regions. The second diffusion region has a first side surface facing the cathode region, a second side surface opposite to the cathode region, and a bottom surface extending between the first and second side surfaces. The third diffusion region covers at least one of the first corner part connecting the first side surface with the bottom surface and the second corner part connecting the second side surface with the bottom surface.