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:
Jan. 29, 2013
Filed:
Oct. 23, 2009
Kikuo Sakurai, Ogaki, JP;
Tomohiro Kuwayama, Kasugai, JP;
Kikuo Sakurai, Ogaki, JP;
Tomohiro Kuwayama, Kasugai, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A ceramic joining unit, ceramic heater and gas sensor, the ceramic joining unit including: a ceramic base member; an electrode pad provided on a surface of the ceramic base member; a coupling terminal; and a joining portion, wherein the electrode pad includes: a first layer in contact with the ceramic base member; and a second layer laminated on a surface of the first layer and in contact with the joining portion, wherein each of the first and second layers contains a ceramic material as a main component, a content of the ceramic material in the first layer is greater than that of the second layer, and a contour of the first layer is located outside of a contour of the second layer at an entire periphery of the first layer.