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. 29, 2013
Filed:
May. 17, 2011
Jun Sato, Tokyo, JP;
Takashi Kojima, Tokyo, JP;
Tomoya Shibasaki, Tokyo, JP;
Osamu Kido, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A dielectric ceramic composition includes BaTiOas a main component; as subcomponents, with respect to 100 moles of BaTiO, 0.9 to 2.0 moles of an oxide of RA in terms of RAO, where RA is at least one selected from Dy, Gd and Tb; 0.3 to 2.0 moles of an oxide of RB in terms of RBO, where RB is at least one selected from Ho and Y; 0.75 to 2.5 moles of an oxide of Yb in terms of YbO; and 0.5 to 2.0 moles of an oxide of Mg in terms of Mg. when contents of oxide of RA, oxide of RB and oxide of Yb with respect to 100 moles of BaTiOare defined as 'α', 'β' and “γ”, respectively, “α”, “β” and “γ” satisfy relations of 0.66≦(α/β)≦3.0 and 0.85≦(α+β)/γ≦2.4. According to the present invention, a dielectric ceramic composition having good properties can be provided.