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. 05, 2001
Filed:
Aug. 20, 1999
Applicant:
Inventors:
Masakazu Hirose, Tokyo, JP;
Hitoshi Oka, Tokyo, JP;
Takeo Tsukada, Tokyo, JP;
Yasuharu Miyauchi, Tokyo, JP;
Toshiyuki Suzuki, Tokyo, JP;
Yoshinori Asakura, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/5462 ; C04B 3/5453 ;
U.S. Cl.
CPC ...
C04B 3/5462 ; C04B 3/5453 ;
Abstract
Piezoelectric ceramics which is made of compounds shaped in bismuth layer containing Sr, Bi, Ti and Ln (lanthanoid). The compound contains SrBi,Ti,O,typed crystals. In the piezoelectric ceramics, an atomic ratio of Ln/(Sr+Ln) is 0<Ln/(Sr+Ln)<0.5.