Patent ID: 11878526
Assignee: SEIKO EPSON CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A liquid ejecting head comprising:
a pressure chamber;
a vibration plate including a first vibration plate, a second vibration plate, and a third vibration plate; and
a piezoelectric actuator including a first electrode, a piezoelectric layer, and a second electrode being stacked in this order, wherein
a plurality of the pressure chambers are arranged in a first direction in plan view from a stacking direction of the vibration plate and the piezoelectric actuator,
a first portion where the piezoelectric layer and the third vibration plate are stacked on the first vibration plate and the second vibration plate, and a second portion where the piezoelectric layer and the third vibration plate are not stacked on the first vibration plate and the second vibration plate are provided in the first direction,
one of the first vibration plate and the second vibration plate has a compressive stress and another one of the first vibration plate and the second vibration plate has a tensile stress, and
a Young's modulus of the third vibration plate is larger than Young's moduli of the first vibration plate and the second vibration plate.