Liquid ejection head
AssigneeRISO Technologies Corporation
InventorsTakashi Tozuka, Minoru Koyata
Life of this patent
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Abstract
According to one embodiment, a liquid ejection head includes a substrate with an opening through which a first liquid can pass. An actuator is on a first side of the substrate and has a plurality of pressure chambers. A manifold is on a second side of the substrate. The manifold forms a first flow path for a second fluid. The liquid ejection head has first electrode with portions formed on an upper surface of the actuator, a surface on the first side of the substrate, an inner wall of the opening, and a surface on the second side of the substrate in a region outside the first flow path.
Claims20
A liquid ejection head, comprising:
- a substrate with an opening through which a first liquid can pass;
- an actuator on a first side of the substrate and having a plurality of pressure chambers for ejecting the first liquid, each pressure chamber being associated with an addressable piezoelectric element for deforming the pressure chamber;
- a manifold on a second side of the substrate opposite the first side, the manifold forming a first flow path for a second fluid;
- and
- a first electrode with portions formed on an upper surface of the actuator, a surface on the first side of the substrate, an inner wall of the opening, and a surface on the second side of the substrate in a region outside the first flow path, the first electrode being electrically connected in common to the addressable piezoelectric elements associated with each pressure chamber in the plurality of pressure chambers of the actuator.
A liquid ejection head, comprising:
- a substrate with a slot-shaped opening extending lengthwise in a first direction;
- a first actuator on a first surface of the substrate to a first side of the slot-shaped opening in a second direction perpendicular to the first direction;
- a second actuator on the first surface of the substrate to a second side of the slot-shaped opening in the second direction
- a manifold on a second surface of the substrate opposite the first surface, the manifold including grooves forming a first flow path for a cooling fluid and a second flow path for an ink, the second flow path being connected to the slot-shaped opening;
- a common electrode connected to the first and second actuators with portions formed on an upper surface of the first and second actuators, the first surface of the substrate, a sidewall of the slot-shaped opening, and the second surface of the substrate;
- and
- a plurality of individual electrodes connected to the first and second actuators, each individual electrode including portions formed on the upper surface of the first or second actuators and the first surface of the substrate.
A liquid ejection apparatus, comprising:
- a liquid ejection head configured to eject a liquid from at least one nozzle, the liquid ejection head including:
- a substrate with an opening through which the liquid can pass;
- an actuator on a first side of the substrate and having a plurality of pressure chambers for ejecting the liquid, each pressure chamber being associated with an addressable piezoelectric element for deforming the pressure chamber;
- a manifold on a second side of the substrate opposite the first side, the manifold forming a first flow path for a cooling fluid;
- and
- a first electrode with portions formed on an upper surface of the actuator, a surface on the first side of the substrate, an inner wall of the opening, and a surface on the second side of the substrate in a region outside the first flow path, the first electrode being electrically connected in common to the addressable piezoelectric elements associated with each pressure chamber in the plurality of pressure chambers of the actuator.
Dependencies are inferred from the claim text.