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:
Mar. 16, 2010
Filed:
Jun. 11, 2007
Miyuki Yanagida, Narita, JP;
Akira Sato, Inba-gun, JP;
Miyuki Yanagida, Narita, JP;
Akira Sato, Inba-gun, JP;
TDK Corporation, Tokyo, JP;
Abstract
A production method of a dielectric ceramic composition comprising a main component including at least one selected from BaTiO, BaCaTiO, BaTiZrOand BaCaTiZrO, and a fourth subcomponent including rare earth oxide; comprising steps of dividing a material of the main component to a first main component material and a second main component material, obtaining a post-reaction material by making the material of the first main component react in advance with a part of the fourth subcomponent material, and adding the material of the second main component and rest of the fourth subcomponent material into the post-reaction material; wherein, when number of moles of the first main component is n1 and number of moles of the second main component is n2, a ratio is 0.5≦n1/(n1+n2)≦1: by which preferable characteristic can be obtained even when dielectric layers are made thin.