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:
May. 06, 2003
Filed:
May. 18, 2001
Applicant:
Inventors:
Assignee:
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/5462 ; C04B 3/5453 ; H01L 4/1187 ;
U.S. Cl.
CPC ...
C04B 3/5462 ; C04B 3/5453 ; H01L 4/1187 ;
Abstract
Provided is a piezoelectric ceramic compact useful as a material for a piezoelectric ceramic compact device or the like, having SrBi Ti O as a main component, containing no or a small amount of lead or lead compound, and exhibiting a Q improved to a level permitting practical use application. The piezoelectric ceramic compact includes a bismuth layer compound as a main component composed of Sr, Bi, Ti and oxygen, and when the molar ratio of Sr, Bi and Ti of the bismuth layer compound as the main component is a:b:c, the relations of 0.13≦a/c<0.25 and 3.5≦(2a+3b)/c≦3.75 are satisfied.