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:
Oct. 09, 1990
Filed:
Sep. 11, 1989
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
AlN-base sintered body with a high thermal conductivity is produced by: preparing a compact of a material comprising 100 parts by weight of aluminum nitride and 0.1-10 parts by weight, calculated on metal element, of at least one component selected from the group consisting of elements of Group 4a, 5a and 6a of the Periodic Table, and compounds thereof; and sintering said compact at a temperature ranging from 1500.degree. to 2000.degree. C. under a non-oxidizing atmosphere having a source of boron and/or carbon supply. The compounds include oxides, borides, nitrides and carbides. The elements include W, Mo, Ta and Ti. Oxides are converted to other compounds through sintering. This AlN-base sintered body has good wettability with metal for metallization and enables simultaneous sintering with metallization layer. Multilayer laminated circuit boards or substrates thereof can be produced.