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:
Jan. 11, 2011
Filed:
Oct. 29, 2007
Yukihisa Takeuchi, Aichi-pref., JP;
Yasumasa Hagiwara, Kariya, JP;
Yuuichi Aoki, Aichi-pref., JP;
Eiichi Torigoe, Anjo, JP;
Yukihisa Takeuchi, Aichi-pref., JP;
Yasumasa Hagiwara, Kariya, JP;
Yuuichi Aoki, Aichi-pref., JP;
Eiichi Torigoe, Anjo, JP;
Denso Corporation, Kariya, JP;
Abstract
Means for a thermally conductive and electrically insulating materialcontaining an AlN crystalmainly comprising AlN, and a production method thereof. In production, a molten aluminum layer is formed on an AlN substratewith at least its surface comprising AlN in an atmosphere of a non-oxidizing gas, and the molten aluminum layer is then heated in an atmosphere of Ngas to form an AlN crystalwhich mainly comprises an AlN layer. The means are also a thermally conductive and electrically insulating material having an AlN crystal and an Al gradient layer, and a production method thereof. In production, a heating step of forming a molten aluminum layeron the AlN layerand heating it in an atmosphere of Ngas is repeated at least twice or more. At this time, the amount of the Ngas dissolved in the molten aluminum layer is decreased as the heating step is repeated.