| 摘要 |
A stack-type piezoelectric device is provided in a configuration wherein an inactive layer is placed between an active layer with internal electrodes therein and a piezoelectric layer with terminal electrodes therein, and wherein the internal electrodes and the terminal electrodes can be securely electrically connected through through holes (THs) formed in the inactive layer. In a stack-type piezoelectric device 1 , an inactive layer 14 placed between an active layer 6 with anodic electrodes 2 and cathodic electrodes 4 as internal electrodes and a piezoelectric layer 9 with terminal electrodes 7, 8 is comprised of a stack of a plurality of piezoelectric layers 13 in each of which THs 11, 12 are formed. This permits each piezoelectric layer 13 to be formed in such a thickness that an electroconductive member 23 can be securely placed in each TH 11, 12 , and the inactive layer 14 can be constructed of a stack of a plurality of such piezoelectric layers 13 . In this configuration, the electroconductive members 23 can be securely placed in THs 11, 12 , and it is thus feasible to securely electrically connect the anodic electrodes 2 to the terminal electrode 7 and the cathodic electrodes 4 to the terminal electrode 8.
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