US 9,812,630 B2
Piezoelectric element, and piezoelectric vibrating device, portable terminal, acoustic generator, acoustic generating device and electronic apparatus including the same
Hiroshi Suenaga, Kirishima (JP)
Assigned to KYOCERA Corporation, Kyoto-Shi, Kyoto (JP)
Appl. No. 14/400,912
Filed by KYOCERA Corporation, Kyoto-shi, Kyoto (JP)
PCT Filed Sep. 30, 2013, PCT No. PCT/JP2013/076562
§ 371(c)(1), (2) Date Nov. 13, 2014,
PCT Pub. No. WO2014/069138, PCT Pub. Date May 8, 2014.
Claims priority of application No. 2012-240224 (JP), filed on Oct. 31, 2012.
Prior Publication US 2015/0130325 A1, May 14, 2015
Int. Cl. H01L 41/047 (2006.01); H01L 41/083 (2006.01); H04R 17/00 (2006.01); H01L 41/273 (2013.01); B06B 1/06 (2006.01); H01L 41/187 (2006.01)
CPC H01L 41/0477 (2013.01) [B06B 1/0662 (2013.01); H01L 41/047 (2013.01); H01L 41/0472 (2013.01); H01L 41/083 (2013.01); H01L 41/273 (2013.01); H04R 17/00 (2013.01); H01L 41/187 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A piezoelectric element, comprising:
a plate-shaped stacked body comprising inner electrodes and piezoelectric layers laminated; and
a surface electrode disposed on one of main surfaces of the plate-shaped stacked body, the surface electrode being electrically connected to the inner electrodes,
the surface electrode having a first area and a second area,
the second area being an area which mainly contains silver palladium and is disposed so as to contact a piezoelectric layer,
the first area being an area which mainly contains silver, covers the second area and is disposed so as to contact the piezoelectric layer around the second area.