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:
Dec. 02, 2003
Filed:
May. 30, 2001
Applicant:
Inventor:
Yoshihiro Okawa, Kokubu, JP;
Assignee:
Kyocera Corporation, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/5465 ; C04B 3/547 ; C04B 3/5478 ;
U.S. Cl.
CPC ...
C04B 3/5465 ; C04B 3/547 ; C04B 3/5478 ;
Abstract
The present inventions provides a dielectric ceramic comprising an oxide containing, as a metal element, at least a rare earth element (Ln), Al, M (M is Ca and/or Sr) and Ti, and at least part of the oxide of Al being present as a crystal phase of &bgr;-Al O and/or &thgr;-Al O thereby having a high &egr; r, high Q value and a small temperature coefficient of resonance frequency in a high frequency region.