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:
Apr. 21, 2026
Filed:
Aug. 29, 2023
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Akio Ueta, Hyogo, JP;
Hiroshi Ohno, Osaka, JP;
Abstract
A group III nitride crystal substrate has a main surface and a back surface opposite to the main surface. The average dislocation density of the main surface and the average dislocation density of the back surface are less than or equal to 6.0×10cm. Furthermore, the difference between the average dislocation density of the main surface and the average dislocation density of the back surface is less than or equal to 5.0×10cm. The warpage of the crystal axis of the main surface has a radius of curvature of more than or equal to 30 m.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile