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. 15, 2014
Filed:
Nov. 10, 2011
Issei Satoh, Itami, JP;
Yuki Seki, Itami, JP;
Koji Uematsu, Itami, JP;
Yoshiyuki Yamamoto, Itami, JP;
Hideki Matsubara, Itami, JP;
Shinsuke Fujiwara, Itami, JP;
Masashi Yoshimura, Itami, JP;
Issei Satoh, Itami, JP;
Yuki Seki, Itami, JP;
Koji Uematsu, Itami, JP;
Yoshiyuki Yamamoto, Itami, JP;
Hideki Matsubara, Itami, JP;
Shinsuke Fujiwara, Itami, JP;
Masashi Yoshimura, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka-shi, Osaka, JP;
Abstract
The present method of manufacturing a GaN-based film includes the steps of preparing a composite substrate, the composite substrate including a support substrate in which a coefficient of thermal expansion in a main surface is more than 0.8 time and less than 1.2 times as high as a coefficient of thermal expansion of GaN crystal in a direction of a axis and a single crystal film arranged on a side of the main surface of the support substrate, the single crystal film having threefold symmetry with respect to an axis perpendicular to a main surface of the single crystal film, and forming a GaN-based film on the main surface of the single crystal film in the composite substrate. Thus, a method of manufacturing a GaN-based film capable of manufacturing a GaN-based film having a large main surface area and less warpage is provided.