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:
Jan. 31, 2012
Filed:
May. 29, 2009
Katsuyoshi Yamaguchi, Kirishima, JP;
Ryota Kuki, Kirishima, JP;
Hiroaki Mino, Kirishima, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
The invention relates to a dielectric ceramic including crystal grains mainly composed of barium titanate. The dielectric ceramic contains 0.01 to 0.06 mole of magnesium in terms of MgO, 0.0007 to 0.03 mole of yttrium in terms of YOand 0.0002-0.03 mole of manganese in terms of MnO per 1 mole of barium constituting the barium titanate. The dielectric ceramic also contains 4.2 to 33.3 parts by mass of niobium in terms of NbOper 100 parts by mass of the barium titanate. Crystal grains of the dielectric ceramic have an average particle size of 0.05 to 0.25 μm. The invention also relates to a capacitor composed of a laminate having dielectric layer made of the dielectric ceramic and a conductive layer.