Liquid ejection head
A liquid ejection head includes a plate with a plurality of nozzles arranged along a first direction through which liquid is ejected. A substrate is on the plate and includes a hole extending along the first direction by which the liquid is supplied. An actuator is on the substrate along the hole. The actuator has a plurality of pressure chambers, from which the liquid from the hole is ejected by the nozzles, and a plurality of air chambers. Each air chamber is between two of the pressure chambers that are adjacent to each other. A plurality of individual electrodes is formed on the substrate and each is connected to a corresponding one of the pressure chambers. A common electrode is formed on the substrate and an inner peripheral surface of the hole.
1. A liquid ejection head, comprising:
a plate including a plurality of nozzles arranged along a first direction;
a substrate on the plate and including a hole extending along the first direction and through which liquid is supplied for ejection from the plurality of nozzles;
a first actuator on the substrate along the hole and including:
a plurality of pressure chambers from which the liquid is supplied from the hole to the nozzles, and
a plurality of air chambers, each air chamber disposed between two of the pressure chambers that are adjacent to each other;
a plurality of individual electrodes, each individual electrode on the substrate and connected to a corresponding one of the pressure chambers;
a common electrode on the substrate and an inner peripheral surface of the hole; and
a second actuator on the substrate along the hole, wherein
the hole is between the first and second actuators.
2. The liquid ejection head according to claim 1 , wherein the liquid is supplied to the first and second actuators through the hole.
3. The liquid ejection head according to claim 1 , wherein the substrate includes one or more grooves between the hole and the first actuator and on which a part of the common electrode is provided.
4. The liquid ejection head according to claim 3 , wherein the grooves are a plurality of V-shaped grooves arranged along a second direction intersecting the first direction and each extending along the first direction.
5. The liquid ejection head according to claim 1 , wherein the hole is at a position corresponding to a center of each of the pressure chambers in a second direction intersecting the first direction.
6. The liquid ejection head according to claim 1 , further comprising:
a manifold on the substrate and including a liquid supply flow path that communicates with the hole.
7. The liquid ejection head according to claim 1 , further comprising:
a frame attached to the substrate by an adhesive, wherein
the common electrode is covered by the adhesive.
8. The liquid ejection head according to claim 1 , wherein
the common electrode is a film of nickel, gold, or copper, and
the common electrode has a thickness between 0.5 lAm to 5 μm.
9. The liquid ejection head according to claim 1 , wherein the liquid is ink for printing or conductive particles for forming a wiring pattern.
10. A liquid ejection device, comprising:
a conveyer configured to convey a medium along a conveyance path; and
a liquid ejection head including:
a plate including a plurality of nozzles arranged along a first direction to face the conveyed medium,
a substrate on the plate and including a hole extending along the first direction and through which liquid is supplied for ejection from the plurality of nozzles,
a first actuator on the substrate along the hole and including:
a plurality of pressure chambers from which the liquid is supplied from the hole to the nozzles, and
a plurality of air chambers, each air chamber disposed between two of the pressure chambers that are adjacent to each other,
a plurality of individual electrodes, each individual electrode on the substrate and connected to a corresponding one of the pressure chambers,
a common electrode on the substrate and an inner peripheral surface of the hole, and
a second actuator on the substrate along the hole, wherein
the hole is between the first and second actuators.
11. The liquid ejection device according to claim 10 , wherein the liquid is supplied to the first and second actuators through the hole.
12. The liquid ejection device according to claim 10 , wherein the substrate includes one or more grooves between the hole and the first actuator and on which a part of the common electrode is provided.
13. The liquid ejection device according to claim 12 , wherein the grooves are a plurality of V-shaped grooves arranged along a second direction intersecting the first direction and each extending along the first direction.
14. The liquid ejection device according to claim 10 , wherein the hole is at a position corresponding to a center of each of the pressure chambers in a second direction intersecting the first direction.
15. The liquid ejection device according to claim 10 , further comprising:
a manifold on the substrate and including a liquid supply flow path that communicates with the hole.
16. The liquid ejection device according to claim 10 , further comprising:
a frame attached to the substrate by an adhesive, wherein
the common electrode is covered by the adhesive.
17. The liquid ejection device according to claim 10 , wherein
the common electrode is a film of nickel, gold, or copper, and
the common electrode has a thickness between 0.5 μm to 5 μm.
18. The liquid ejection device according to claim 10 , wherein the liquid is ink for printing or conductive particles for forming a wiring pattern.