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. 22, 2002
Filed:
Mar. 15, 2000
Applicant:
Inventors:
Tomoaki Kawata, Tokyo, JP;
Akira Nakamura, Chiba, JP;
Toshio Sakurai, Chiba, JP;
Aya Fukuhara, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/5468 ;
U.S. Cl.
CPC ...
C04B 3/5468 ;
Abstract
The composition of dielectric ceramics is formed in that a main component is expressed with a general formula of xBaO·yNd O ·zTiO (provided that the general formula has the relation of 6≦x≦23, 13≦y≦30, 64≦z≦68 and x+y+z=100), and in relation with the main components, sub-components are contained of Cu oxides 0.1 to 3.0 wt % in terms of CuO, Zn oxide 0.1 to 4.0 wt % in terms of ZnO, and B oxide 0.1 to 3.0 wt % in term of B O . It is preferable that Ag 0.3 to 1.5 wt % is contained as the sub-component.