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. 16, 1993
Filed:
Jun. 26, 1992
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; H01B / ; H01B / ;
U.S. Cl.
CPC ...
106-113 ; 106-118 ; 106-123 ; 106-114 ; 501 15 ; 501 17 ; 501 32 ; 252512 ; 252518 ;
Abstract
A composition for metalizing low temperature-fired ceramics according to the invention includes: a combination of two or three oxides selected from the group consisting of 1 to 8 percent by weight of bismuth(III) oxide (Bi.sub.2 O.sub.3), 0.1 to 5 percent by weight of MoO.sub.3, and 0.1 to 2 percent by weight of Cr.sub.2 O.sub.3 as well as a primary constituent, that is, mixture of copper (Cu) and copper(II) oxide (CuO) or mixture of copper(II) oxide (CuO) and copper(I) oxide (Cu.sub.2 O). The additives of the invention efficiently keep the resultant metalized layer out of cracks and prevent local sintering and burr of the metalized layer.