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:
Dec. 25, 2012
Filed:
Aug. 30, 2011
Takashi Kajino, Tokyo, JP;
Kazuhiko Itoh, Tokyo, JP;
Teiichi Tanaka, Tokyo, JP;
Atsushi Hitomi, Tokyo, JP;
Takashi Ota, Tokyo, JP;
Takashi Kajino, Tokyo, JP;
Kazuhiko Itoh, Tokyo, JP;
Teiichi Tanaka, Tokyo, JP;
Atsushi Hitomi, Tokyo, JP;
Takashi Ota, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A multilayer PTC thermistorincludes a ceramic bodyhaving a plurality of ceramic layersand internal electrodesbetween adjacent ceramic layers, external electrodeson the end facesof the ceramic body, and a glass layeron the surfacesof the ceramic body, the glass layercontaining an oxide of at least one element selected from the group consisting of zinc and bismuth as the major component, wherein the alkali oxide content of the glass layer is no greater than 0.8 mass %.