Patent ID: 11912031
Assignee: SEIKO EPSON CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A piezoelectric device comprising:
a vibration plate provided on one surface side of a substrate provided with a plurality of recesses; and
a piezoelectric actuator including a first electrode, a piezoelectric layer, and a second electrode stacked on a surface of the vibration plate on an opposite side of the substrate, wherein
the recesses have a shape in which a length in a first direction is larger than a length in a second direction intersecting with the first direction,
the piezoelectric actuator includes an active portion provided in a region opposed to one of the recesses, in which the piezoelectric layer is sandwiched between the first electrode and the second electrode, and
the active portion includes
a first region provided in a region opposed to the recess and extending in the first direction, and
a second region provided in a region corresponding to a central part in the first direction of the recess, and being configured such that a laminated body including the active portion and the vibration plate has a thickness larger than a thickness of a portion corresponding to the first region and that deformation of the second region is suppressed as compared to deformation of the first region when a voltage is applied between the first electrode and the second electrode,
wherein the first region and the second region are aligned in the first direction.