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. 03, 2008
Filed:
Jan. 04, 2007
Takashi Hiramatsu, Kusatsu, JP;
Teppei Akiyoshi, Shiga-ken, JP;
Masahiro Otsuka, Yasu, JP;
Abstract
A dielectric ceramic material comprising the composition: 100(BaCa)TiO+aMnO+bCuO+cSiO+dMgO+eRO (wherein coefficients 100, a, b, c, d, and e each represent mols; m represents the molar ratio of (BaCa) to Ti; and RO represents at least one rare-earth element oxide selected from YO, LaO, 2CeO, NdO, SmO, EuO, GdO, TbO, DyO, HoO, ErO, TmO, YbOand LuO), wherein m, x, a, b, c, d, and e satisfy the relationships: 0.998≦m≦1.030, 0.04≦x≦0.15, 0.01≦a≦5, 0.05≦b≦5, 0.2≦c≦8, 0.05≦d≦3.0, and 0.05≦e≦2.5, and the dielectric ceramic material has an average grain size of 0.3 μm to 0.7 μm, is used to make reliable multilayer ceramic capacitors including dielectric ceramic layers each having a small thickness of about 1 μm.