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:
Aug. 15, 2017
Filed:
Sep. 10, 2012
Masahiro Hayashi, Miyagi, JP;
Seiji Sarayama, Miyagi, JP;
Takashi Satoh, Miyagi, JP;
Hiroshi Nambu, Kanagawa, JP;
Chiharu Kimura, Miyagi, JP;
Naoya Miyoshi, Miyagi, JP;
Masahiro Hayashi, Miyagi, JP;
Seiji Sarayama, Miyagi, JP;
Takashi Satoh, Miyagi, JP;
Hiroshi Nambu, Kanagawa, JP;
Chiharu Kimura, Miyagi, JP;
Naoya Miyoshi, Miyagi, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A group 13 nitride crystal having a hexagonal crystal structure and containing at least a nitrogen atom and at least a metal atom selected from a group consisting of B, Al, Ga, In, and Tl. The group 13 nitride crystal includes a first region disposed on an inner side in a cross section intersecting c-axis, a third region disposed on an outermost side in the cross section and having a crystal property different from that of the first region, and a second region disposed at least partially between the first region and the third region in the cross section, the second region being a transition region of a crystal growth and having a crystal property different from that of the first region and that of the third region.