Liquid ejection head
AssigneeRISO Technologies Corporation
InventorTsubasa Konishi
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a liquid ejection head includes an actuator with a plurality of pressure chambers spaced from each other in a first direction. Each pressure chamber extends lengthwise in a second direction intersecting the first direction. An anti-reflection film is on an inner surface of the pressure chambers. A diaphragm portion is at an end of each pressure chamber. The diaphragm portion provides a flow cross-section that is less than the pressure chamber and is between the pressure chamber and a common chamber to which the pressure chambers are fluidly connected.
Claims19
A liquid ejection head, comprising:
- an actuator with a plurality of pressure chambers spaced from each other in a first direction, each pressure chamber extending lengthwise in a second direction intersecting the first direction;
- an electrode on an inner surface of the pressure chambers;
- an anti-reflection film on the electrode on the inner surface of the pressure chambers;
- and
- a diaphragm portion at an end of each pressure chamber, the diaphragm portion providing a flow cross-section that is less than the pressure chamber and being between the pressure chamber and a common chamber to which the plurality of pressure chambers are fluidly connected, wherein
- the diaphragm portion comprises a cured photosensitive resin, and
- the anti-reflection film has an absorbance value at a light wavelength which cures the cured photosensitive resin that is greater than an absorbance value of the electrode at the light wavelength.
An inkjet head, comprising:
- a piezoelectric body having a plurality of grooves formed therein, the grooves being spaced from each other in a first direction, extending lengthwise in a second direction, and extending into the piezoelectric body in a third direction;
- a metallic electrode film on an inner surface of at least some of the plurality of grooves;
- an anti-reflection film covering at least a portion of the metallic electrode film on the inner surface of at least some of the plurality of grooves;
- and
- a cured photosensitive resin covering at least a portion of the anti-reflection film, wherein
- the cured photosensitive resin partially blocks ends of at least some of the plurality of grooves, and
- the anti-reflection film has an absorbance value at a light wavelength which cures the cured photosensitive resin that is greater than an absorbance value of the metallic electrode film at the light wavelength.
An image forming apparatus, comprising:
- a sheet conveyor;
- and
- a liquid ejection head positioned to eject liquid towards a medium on the sheet conveyor, the liquid ejection head including:
- an actuator with a plurality of pressure chambers spaced from each other in a first direction, each pressure chamber extending lengthwise in a second direction intersecting the first direction;
- an electrode on an inner surface of the pressure chambers;
- an anti-reflection film on the electrode on the inner surface of the pressure chambers;
- and
- a diaphragm portion at an end of each pressure chamber, the diaphragm portion providing a flow cross-section that is less than the pressure chamber and being between the pressure chamber and a common chamber to which the plurality of pressure chambers are fluidly connected, wherein
- the diaphragm portion comprises a cured photosensitive resin, and
- the anti-reflection film has an absorbance value at a light wavelength which cures the cured photosensitive resin that is greater than an absorbance value of the electrode at the light wavelength.
Dependencies are inferred from the claim text.