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:
Feb. 13, 2007
Filed:
Nov. 16, 2004
Yuji Umeda, Chuo-ku, JP;
Akira Sato, Chuo-ku, JP;
Yuji Umeda, Chuo-ku, JP;
Akira Sato, Chuo-ku, JP;
TDK Corporation, Tokyo, JP;
Abstract
A production method of a dielectric ceramic composition having a step of firing dielectric material including a main component ingredient and a subcomponent ingredient, wherein said main component ingredient before firing is barium titanate ingredient powder having the perovskite type crystal structure expressed by ABO, and a ingredient powder having a ratio A/B of A site components and B site components of 1.006≦A/B≦1.035 and the specific surface area of 8 to 50 m/g is used. According to the invention, a dielectric ceramic composition having preferable electric characteristics and temperature characteristic can be provided even in the case of being composed of fine particle and a capacitor made to be a thin layer.