Patent ID: 11858270
Assignee: SEIKO EPSON CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 18:
19. A liquid ejection head comprising:
a piezoelectric body;
a vibration plate to be vibrated by a drive of the piezoelectric body; and
a pressure chamber substrate including a pressure chamber which applies a pressure to a liquid by a vibration of the vibration plate,
wherein the pressure chamber substrate, the vibration plate, and the piezoelectric body are laminated in this order, and
the vibration plate includes:
a first layer containing silicon as a constituent element;
a second layer which is disposed between the first layer and the piezoelectric body, and which contains as a constituent element, a metal element selected from chromium, titanium, and aluminum; and
a third layer which is disposed between the second layer and the piezoelectric body, and which contains zirconium as a constituent element,
wherein the second layer contains titanium oxide, and
wherein the titanium oxide contained in the second layer has a rutile structure.