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. 13, 2015
Filed:
Jan. 28, 2014
Tdk Corporation, Minato-ku, Tokyo, JP;
Shusaku Umemoto, Tokyo, JP;
Takashi Suzuki, Tokyo, JP;
Hidekazu Sato, Tokyo, JP;
Masaki Takahashi, Tokyo, JP;
Shinichi Kondo, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
In order to provide a dielectric ceramic composition capable of sintering at a low temperature, implementing a low relative dielectric constant, providing other excellent properties (such as a relative density and an insulation resistance), performing co-firing of different materials, and suppressing dispersion of Ag in the sintered body when the internal electrode is formed, the dielectric ceramic composition includes a main ingredient containing SiO—KO—BO-based glass of 40 to 65 weight %, quartz of 35 to 50 weight %, and amorphous silica of remaining weight %; and a subsidiary ingredient containing alumina of 1.5 to 4 weight %, KO-MO—SiO—BO-based glass (where 'MO' denotes at least any one selected from a group consisting of CaO and SrO) of 5 to 20 weight % relative to the main ingredient of 100 weight %.