| 摘要 |
PURPOSE:To completely eliminate the production of a crack in an insulating layer due to expansion and contraction even when a voltage is impressed on an electrostrictive effect element in order to cause the expansion and contraction due to an electrostrictive effect and to completely eliminate a disturbance action of the expansion and contraction due to a non-electric field part when the insulating layer has been formed by a method wherein an inorganic insulating layer is formed only in an exposed part of an internal electrode sheet on a side end face of the element and on an electrostrictive material near the exposed part. CONSTITUTION:An electrostrictive effect element is constituted in such a way that only exposed parts on element side faces of internal electrode sheets 2, 2' exposed to the outside and parts near the internal electrodes on the element side faces of electrostrictive material films 1 are coated with outside electrodes 3, 3'. Because an insulating layer is divided, a stretch is hardly exerted on the insulating layer and a bending stress is not exerted. Accordingly, even when the electrostrictive effect element is expanded and contracted, it is possible to completely eliminate a problem that a crack is produced in the insulating layer or that the insulating layer is stripped off.
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