Liquid ejection head, liquid ejection apparatus, piezoelectric device, and method for manufacturing piezoelectric device

Patent metadata

Field	Value
Publication number	US-11858270-B2
Application number	US-202117322204-A
Country	US
Kind code	B2
Filing date	May 17, 2021
Priority date	May 20, 2020
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

A liquid ejection head includes: a piezoelectric body; an 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 an vibration of the vibration plate; 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.

First claim

What is claimed is:

1. 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 has a thickness smaller than that of each of the first layer and the third layer.

2. The liquid ejection head according to claim 1 ,
wherein the first layer contains silicon oxide, and
the third layer contains zirconium oxide.

3. The liquid ejection head according to claim 1 ,
wherein the second layer contains chromium oxide.

4. The liquid ejection head according to claim 3 ,
wherein the chromium oxide contained in the second layer has an amorphous structure.

5. The liquid ejection head according to claim 1 ,
wherein the second layer contains titanium oxide.

6. The liquid ejection head according to claim 1 ,
wherein the second layer contains aluminum oxide.

7. The liquid ejection head according to claim 6 ,
wherein the aluminum oxide contained in the second layer has an amorphous structure or a trigonal structure.

8. The liquid ejection head according to claim 1 ,
wherein the second layer has a thickness of 20 to 50 nm.

9. The liquid ejection head according to claim 1 ,
wherein the vibration plate further includes a fourth layer which is disposed between the first layer and the second layer and which contains as a constituent element, the metal element contained in the second layer and silicon.

10. The liquid ejection head according to claim 9 ,
wherein the second layer further contains silicon as a constituent element, and
a content of the silicon in the fourth layer is higher than a content of the silicon in the second layer.

11. The liquid ejection head according to claim 1 ,
wherein the vibration plate further includes a fifth layer which is disposed between the second layer and the third layer and which contains as a constituent element, the metal element contained in the second layer and zirconium.

12. The liquid ejection head according to claim 1 ,
further comprising piezoelectric elements including the piezoelectric body,
wherein the piezoelectric elements have:
first electrodes provided for the respective piezoelectric elements; and
a second electrode commonly provided for the piezoelectric elements, and
the first electrodes are disposed between the piezoelectric body and the vibration plate.

13. The liquid ejection head according to claim 1 ,
further comprising piezoelectric elements including the piezoelectric body,
wherein the piezoelectric elements have:
a first electrode commonly provided for the piezoelectric elements; and
second electrodes provided for the respective piezoelectric elements, and
the first electrode is disposed between the piezoelectric body and the vibration plate.

14. A liquid ejection apparatus comprising:
the liquid ejection head according to claim 1 ; and
a control portion which controls a drive of the piezoelectric body.

15. 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 metal element contained in the second layer is unlikely to be oxidized as compared to zirconium.

16. The liquid ejection head according to claim 15 , wherein the metal element contained in the second layer is unlikely to be oxidized as compared to silicon.

17. 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 free energy of oxide formation of the metal element contained in the second layer is higher than free energy of oxide formation of zirconium.

18. The liquid ejection head according to claim 17 , wherein the free energy of oxide formation of the metal element contained in the second layer is higher than free energy of oxide formation of silicon.

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.

20. 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

Assignees

• Seiko Epson Corp

Inventors

• Shimizu Toshihiro
• Koike Harunobu
• Aimono Takanori
• Nakayama Masao
• Sawasaki Tatsuo
• Nishi Chihiro
• Mochizuki Noritaka
• Yamazaki Yasushi
• Tonomura Osamu

Classifications

• B41J2/14233 Primary

  of film type, deformed by bending and disposed on a diaphragm · CPC title

• B41J2/025

  by vibration · CPC title

• B41J2/175

  Ink supply systems {; Circuit parts therefor} · CPC title

• B41J2/01 Primary

  Ink jet · CPC title

• B41J2/045

  by pressure, e.g. electromechanical transducers · CPC title