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发明公开
CN107887501A 压电元件及电子设备 审中-实审

压电元件及电子设备
摘要：
本发明提供能够抑制压电膜产生裂缝的压电元件及电子设备。压电元件具备：压电元件主体，是第一电极层、设于第一电极层的压电体层及设于压电体层的第二电极层的层叠体；以及金属层，隔着绝缘层而设于第二电极层，压电体层在从第一电极层、压电体层及第二电极层的层叠方向观察的俯视观察下，从与压电元件主体的外周缘重叠的第二电极层的外周缘的重叠部的至少一部分的内侧向外侧延伸设置，金属层和绝缘层在俯视观察下，从重叠部的至少一部分的内侧向外侧延伸设置，与比第二电极层的外周缘更靠外侧的压电体层重叠。
摘要（英）：

The invention provides a piezoelectric element and an electronic apparatus capable of preventing the cracks in a piezoelectric film from occurring. The piezoelectric element includes a piezoelectric element main body as a laminated body of a first electrode layer, a piezoelectric layer disposed on the first electrode layer, and a second electrode layer disposed on the piezoelectric layer, and a metal layer disposed on the second electrode layer via an insulating layer, the piezoelectric layer extends from an inner side of at least a part of an overlapping part of an outer peripheral edge of the second electrode layer overlapping an outer peripheral edge of the piezoelectric element main body to an outer side in a plan view viewed from a stacking direction of the first electrode layer, thepiezoelectric layer, and the second electrode layer, and the metal layer and the insulating layer extend from an inner side of at least a part of the overlapping part to an outer side to overlap the piezoelectric layer on an outer side of an outer peripheral edge of the second electrode layer in the plan view.

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