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:
Feb. 04, 2014
Filed:
Oct. 21, 2011
Tomohisa Katou, Tsukuba, JP;
Ichirou Nagai, Tsukuba, JP;
Tomonori Miura, Tsukuba, JP;
Hiroyuki Kamata, Sakura, JP;
Tomohisa Katou, Tsukuba, JP;
Ichirou Nagai, Tsukuba, JP;
Tomonori Miura, Tsukuba, JP;
Hiroyuki Kamata, Sakura, JP;
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
Provided is a manufacturing device of an aluminum nitride single crystal including a crucible. An aluminum nitride raw material and a seed crystal are stored in an inner portion of the crucible. The seed crystal is placed so as to face the aluminum nitride raw material. The crucible includes an inner crucible and an outer crucible. The inner crucible stores the aluminum nitride raw material and the seed crystal inside the inner crucible. The inner crucible is also corrosion resistant to a sublimation gas of the aluminum nitride raw material. The inner crucible includes either, a single body of a metal having an ion radius larger than an ion radius of an aluminum, or includes a nitride of the metal. The outer crucible includes a boron nitride. The outer crucible covers the inner crucible.