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:
Sep. 21, 2004
Filed:
Mar. 07, 2002
Applicant:
Inventors:
Masato Taniguchi, Aichi, JP;
Manabu Okinaka, Aichi, JP;
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/00 ;
U.S. Cl.
CPC ...
H05B 3/00 ;
Abstract
A joint structure which does not exhibit impaired joining strength induced by exposure to heat cycles and the occurrence of migration, in a ceramic heater for a glow plug or like device. A heating element is embedded in a silicon nitride ceramic substrate . Lead wires are joined to corresponding lead wire connection terminals , which are connected to the heating element while electrical continuity is established therebetween, by use of a brazing metal which contains a predominant amount of copper. The brazing metal used for joining assumes the form of a brazing metal layer having a thickness of 30-400 &mgr;m.