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. 25, 1996
Filed:
Mar. 07, 1994
Akira Sasame, Hyogo, JP;
Hitoyuki Sakanoue, Hyogo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An aluminum nitride sintered body has a metallized layer on its surface. The metallized layer contains tungsten, aluminum oxide and calcium oxide. Preferably, the metallized layer contains 40 to 96 percent by weight of a metal, 0.4 to 25 percent by weight of an aluminum oxide and 3 to 35 percent by weight of calcium oxide. In a method of forming a metallized layer on the surface of the aluminum nitride sintered body, such body is first formed by firing. Then, a metal paste of tungsten containing powder of calcium oxide and powder of aluminum oxide is provided. The metal paste is coated on the surface of the aluminum nitride sintered body which is then fired with the metal paste in an inert atmosphere.