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:
Jun. 11, 2002
Filed:
Aug. 17, 2000
Akira Kuibira, Itami, JP;
Hirohiko Nakata, Itami, JP;
Kenjiro Higaki, Itami, JP;
Kazutaka Sasaki, Itami, JP;
Takashi Ishii, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An aluminum nitride sintered body with high heat conductivity and high strength as well as a method of inexpensively manufacturing such an aluminum nitride sintered body at a low temperature are provided. The aluminum nitride sintered body is manufactured by adding a compound of at least one type of rare earth element (R) selected from La, Ce, Pr, Sm; and Eu, Y compound, Ca compound, and Al compound to an AlN powder and sintering the resulting mixture at a temperature of 1550° C. to 1750° C. The content of oxygen forming Al O existing in an aluminate with rare earth element (R), Y and Ca and oxygen forming independently existing Al O is calculated as 0.01 to 5.0% by weight, heat conductivity is 166 to 200 W/mK, and bending strength is at least 300 MPa.