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. 07, 2002
Filed:
Sep. 29, 2000
Applicant:
Inventors:
Katsuhiro Horikawa, Shiga-ken, JP;
Koji Matsubara, Omihachiman, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B 3/12 ; H01L 4/100 ;
U.S. Cl.
CPC ...
H01B 3/12 ; H01L 4/100 ;
Abstract
A piezoelectric ceramic is provided which has a very low loss and superior workability in micro-fabrication. The piezoelectric ceramic contains at least Pb, Mn, Nb, Ti and Zr as primary metal components, in which, when the composition of the piezoelectric ceramic is represented by the formula Pb {(Mn Nb ) Ti Zr }O , the x, y, z, a, and b are, on a molar basis, such that 0.95≦x≦0.995, 0.055≦y≦0.10, 0.40≦z≦0.55, 2.01≦b/a≦2.40, and a+b=1. In addition, the average grain diameter of the sintered piezoelectric ceramic is about 2 &mgr;m or less.