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:
Nov. 04, 1997
Filed:
Jun. 11, 1996
Applicant:
Inventors:
Hiroshi Makihara, Kawasaki, JP;
Koji Omote, Kawasaki, JP;
Nobuo Kamehara, Kawasaki, JP;
Mineharu Tsukada, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
156 89 ; 264 61 ;
Abstract
A process of producing a multiple-layer circuit board of aluminum nitride, including the steps of: preparing green sheets of aluminum nitride, forming on the green sheets conductor patterns of a conductor paste containing tungsten as a main conductor component, laminating the green sheets with the conductor patterns formed thereon to form a lamination, and firing the lamination in a container made of boron nitride and in a pressurized nitrogen gas atmosphere.