Denso Corporation

Nippon Soken, Inc.

Kouji Noda

Satoshi Suzuki

Akira Fujii

Masaya Nakamura

Toshiatsu Nagaya

Akio Iwase

Shige Kadotani

Masatoshi Ikeda

Atsushi Murai

Daisuke Shibata

Hiroaki Asano

Toshiatu Nagaya

A stacked piezoelectric deviceincluding a ceramic laminate formed by laminating piezoelectric ceramic layers and inner electrode layers alternately and a pair of side electrodes. The inner electrode layersandhave inner electrode portionsandand the recessed portionsand. The ceramic laminatehas the stress absorbing portionsand. A recessed distance of one of two of the recessed portionsandwhich interleave the stress absorbing portionsandtherebetween which is located on the same side surface as the stress absorbing portionoris greater than the depth of the stress absorbing portionand

Stacked piezoelectric device

A multilayered piezoelectric element and a method of producing the multilayered piezoelectric element are disclosed. The multilayered piezoelectric element is made of piezoelectric ceramic layers and electrode formation layers which are alternately laminated. The piezoelectric ceramic layers are made of crystal oriented ceramic as polycrystalline material. The crystal oriented ceramic is made mainly of an isotropic perovskite type compound in which the specific {100} crystal plane of each of crystal grains that form the polycrystalline material is oriented. The electrode formation layers have electrode parts forming inner electrodes containing a conductive metal. The isotropic perovskite type compound is expressed by a general formula (1):[Ag{Li(KNa)}](NbTaSb)O&#x2003;&#x2003;(1),where 0&#x2266;x&#x2266;0.2, 0&#x2266;y&#x2266;1, 0&#x2266;z&#x2266;0.4, 0&#x2266;w&#x2266;0.2, x+z+w&#x3e;0, 0&#x3c;h&#x2266;0.05, 0.94&#x2266;j&#x2266;1, and 0&#x2266;k&#x2266;0.5).

Multilayered piezoelectric element and method of producing the same

Growing community of inventors

Aichi-ken, Japan

Kouji Noda