Liquid ejection head
AssigneeCanon Kabushiki Kaisha
InventorShinichiro Watanabe
Life of this patent
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Abstract
A liquid ejection head includes a first substrate and a second substrate. The first substrate includes a pressure chamber communicating with an ejection port that ejects liquid, a diaphragm that forms part of a wall constituting the pressure chamber, and at least one piezoelectric element configured to generate energy for displacing the diaphragm to eject liquid through the ejection port. The second substrate has a cavity containing the piezoelectric element. The first substrate and the second substrate are joined together with an adhesive. A liquid repellent portion surrounding the piezoelectric element is disposed on a surface of the first substrate where the piezoelectric element is disposed.
Claims11
A liquid ejection head comprising:
- a first substrate comprising:
- a pressure chamber communicating with an ejection port that ejects liquid;
- a diaphragm that forms part of a wall constituting the pressure chamber;
- and
- at least one piezoelectric element configured to generate energy for displacing the diaphragm to eject liquid through the ejection port;
- and
- a second substrate comprising a cavity containing the piezoelectric element,
- wherein the first substrate and the second substrate are joined together with an adhesive, and
- wherein a liquid repellent portion surrounding the piezoelectric element is disposed on a surface of the first substrate where the piezoelectric element is disposed.
A liquid ejection head comprising:
- a first substrate comprising:
- a pressure chamber communicating with an ejection port that ejects liquid;
- a diaphragm that forms part of a wall constituting the pressure chamber;
- and
- at least one piezoelectric element configured to generate energy for displacing the diaphragm to eject liquid through the ejection port;
- a second substrate comprising a cavity containing the piezoelectric element;
- and
- a junction at which the first substrate and the second substrate are joined together with an adhesive,
- wherein a liquid repellent portion surrounding the piezoelectric element is disposed on a surface of the first substrate where the piezoelectric element is disposed, the liquid repellent portion being disposed between the piezoelectric element and the junction.
Dependencies are inferred from the claim text.