| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated piezoelectric element that is equipped with external electrodes and internal electrodes, which are hardly disconnected from each other, and superior in durability even when it is made to operate continuously in a high electric field under a high pressure for a long time. SOLUTION: The laminated piezoelectric element is equipped with a columnar laminate 1a composed of a plurality of piezoelectric materials 1 and a plurality of the internal electrodes 2 which are alternately laminated and a pair of the external electrodes 4 which are provided on the sides of the columnar laminate 1a and where every other internal electrodes 2 is alternately connected. A projecting conductive terminal 5 projecting from the side of the columnar laminate 1a is provided to every other end of the internal electrodes 2, the external electrode 4 formed of plate-like conductive member 4a is bonded to the projecting conductive terminals 5, and the thickness 2a of the end of the internal electrode 2 where the projecting conductive terminal 5 is joined is set larger than that of the center of the internal electrode 2. COPYRIGHT: (C)2004,JPO
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