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:
Mar. 21, 2023
Filed:
Feb. 21, 2020
Ngk Insulators, Ltd., Nagoya, JP;
Takayuki Hirao, Nisshin, JP;
Hirokazu Nakanishi, Nagoya, JP;
Mikiya Ichimura, Ichinomiya, JP;
Takanao Shimodaira, Nagoya, JP;
Masahiro Sakai, Nagoya, JP;
Takashi Yoshino, Ama, JP;
NGK INSULATORS, LTD., Nagoya, JP;
Abstract
A layer of a crystal of a group 13 nitride selected from gallium nitride, aluminum nitride, indium nitride and the mixed crystals thereof has an upper surface and a bottom surface. The upper surface of a crystal layer of the group 13 nitride includes a linear high-luminance light-emitting part and a low-luminance light-emitting region adjacent to the high-luminance light-emitting part, observed by cathode luminescence. The high-luminance light-emitting part includes a portion extending along an m-plane of the crystal of the group 13 nitride. The crystal of the nitride of the group 13 element contains oxygen atoms in a content of 1×10atom/cmor less, silicon atoms, manganese atoms, carbon atoms, magnesium atoms and calcium atoms in contents of 1×10atom/cmor less, chromium atoms in a content of 1×10atom/cmor less and chlorine atoms in a content of 1×10atom/cmor less.