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

Claim 14:
15. 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 portion where the piezoelectric layer and the third vibration plate are stacked in the first direction on the first vibration plate and the second vibration plate, and a portion where the piezoelectric layer and the third vibration plate are not stacked are provided,
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,
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, and
the portion where the piezoelectric layer and the third vibration plate are not stacked is a portion corresponding to a center in the first direction of the pressure chamber.