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. 29, 1993
Filed:
Jan. 21, 1992
Applicant:
Inventor:
Takashi Okawa, Kagoshima, JP;
Assignee:
Kyocera Corporation, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501138 ; 501139 ;
Abstract
A dielectric ceramic composition of matter characterized in that the composition of matter contains 0.003 to 0.3% by weight manganese in addition to the main composition of matter represented by the composition formula xBaO.multidot.yNd.sub.2 O.sub.3 .multidot.zTiO.sub.2 .multidot.wBi.sub.2 O.sub.3 wherein 0.110.ltoreq.x.ltoreq.0.170, 0.120.ltoreq.y.ltoreq.0.185, 0.630.ltoreq.z.ltoreq. 0.710, 0.020.ltoreq.w.ltoreq.0.090, and x+y+z+w=1. This composition of matter is high in dielectric constant, low in the temperature dependency of resonance frequency in a resonator, and high in Q-value.