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:
Jun. 04, 2013
Filed:
Nov. 08, 2010
Hidesada Natsui, Tokyo, JP;
Tatsuya Ishii, Tokyo, JP;
Takeo Tsukada, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
Dielectric ceramic composition includes a hexagonal type barium titanate as a main component shown by a generic formula of (BaM)(TiMn)Oand having hexagonal structure wherein an effective ionic radius of 12-coordinated 'M' is −20% or more to +20% or less with respect to an effective ionic radius of 12-coordinated Baand the A, B, α and β satisfy relations of 1.000<(A/B)≦1.040, 0≦α<0.003, 0.03≦β≦0.2, and as subcomponents, with respect to the main component, certain contents of alkaline earth oxide such as MgO and the like, MnOand/or CrO, and CuO and AlOand rare earth element oxide and glass component including SiO. According to the present invention, it can be provided the hexagonal type barium titanate powder and the dielectric ceramic composition which are preferable for producing electronic components such as a capacitor and the like showing comparatively high specific permittivity, having advantageous insulation property and having sufficient reliability.