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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.:

US 9406866 B1

PDFFull Text
Date of Patent:
Aug. 02, 2016

Filed:

Nov. 27, 2012

Piezoelectric device with piezoelectric ceramic layer having ag segregated in voids in sintered body of perovskite composition

Applicant:

Taiyo Yuden Co., Ltd., Taito-ku, Tokyo, JP;

Inventors:

Shinichiro Ikemi, Takasaki, JP;

Yutaka Doshida, Takasaki, JP;

Assignee:

TAIYO YUDEN CO., LTD., Tokyo, JP;

Attorney:

Law Office of Katsuhiro Arai

Primary Examiner:

J San Martin

Int. Cl.
CPC ...
H01L 41/187 (2006.01); C04B 35/493 (2006.01); C04B 35/626 (2006.01); H01L 41/43 (2013.01); H01L 41/047 (2006.01); C04B 35/495 (2006.01); C04B 35/491 (2006.01);
U.S. Cl.
CPC ...
H01L 41/1876 (2013.01); C04B 35/491 (2013.01); C04B 35/493 (2013.01); C04B 35/495 (2013.01); C04B 35/62685 (2013.01); H01L 41/0477 (2013.01); H01L 41/1873 (2013.01); H01L 41/1875 (2013.01); H01L 41/43 (2013.01); C04B 2235/3203 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3227 (2013.01); C04B 2235/3251 (2013.01); C04B 2235/3279 (2013.01); C04B 2235/3284 (2013.01); C04B 2235/3291 (2013.01); C04B 2235/768 (2013.01); C04B 2235/786 (2013.01); C04B 2235/85 (2013.01);
Abstract

A piezoelectric device is provided with: a piezoelectric ceramic layer that is obtained by firing a piezoelectric ceramic composition which contains a perovskite composition and an Ag component; and a conductor layer that sandwiches the piezoelectric ceramic layer, wherein Ag is segregated in voids in a sintered body of the perovskite composition in the piezoelectric ceramic layer. The piezoelectric ceramic composition preferably contains a perovskite composition which is represented by (Pba.Rex){Zr.Ti,.(NiNb).(ZnNb)}O(wherein Re represents La and/or Nd, and a-e and x satisfy the following conditions 0.95≦a≦1.05, 0≦x≦0.05, 0.35≦b<0.45, 0.35≦c≦0.45, 0≦d≦0.10, 0.07≦e≦0.20 and b+c+d+e=1) and 0.05-0.3% by mass of an Ag component in terms of oxides relative to the perovskite composition.

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