An inkjet head comprises a drive section, a nozzle plate, a substrate and a wiring section. The drive section comprises two integral piezoelectric members of which polarization directions are opposite with respect to the longitudinal direction of the piezoelectric member, wherein a plurality of grooves arranged from one piezoelectric member to the middle of the other piezoelectric member and a plurality of holes arranged across the two piezoelectric members are alternately arranged along the longitudinal direction of the piezoelectric member. The nozzle plate is fixed on one main surface of the one piezoelectric member and comprises a plurality of nozzle holes facing the plurality of the grooves. The substrate is fixed with the other main surface of the other piezoelectric member. The wiring section is arranged on an inner surface of the hole and at a position facing the hole of the substrate.

A discharge channel and a non-discharge channel are formed to have a similar shape, that is, to include extension portions and raise-and-cut portions continuing from end portions of both the extension portions, respectively. Then, imparting of a catalyst, washing of an unnecessary catalyst, plating, and the like are performed on a target surface, as a plating step. In an embodiment, an electrode clearance groove is formed after the plating step. Since channel grooves for the discharge channel and the non-discharge channel have a similar shape, it is possible to cause a water flow to uniformly flow in the channels when washing is performed, and thus to avoid an occurrence of a situation in which a lump is formed in the channel groove by plating.

There are provided a liquid jet head and a liquid jet recording device capable of reducing the cost. A liquid jet head according to an embodiment of the disclosure includes a nozzle plate provided with a nozzle, an actuator disposed so as to be opposed to the nozzle plate, and having a channel communicated with the nozzle and an electrode disposed on a wall surface of the channel, and an adhesive layer disposed between the actuator and the nozzle plate, and including a plurality of insulating particles.

An inkjet head includes a nozzle plate substrate having a nozzle for ejecting ink toward a recording medium, and an oil repellent layer on a surface of the nozzle plate substrate, the surface facing the recording medium. The oil repellent layer comprises a fluorine-based compound in which neighboring molecules are cross-linked in a direction parallel to the surface, and cross-links of the neighboring molecules are resistant to structural change when subjected to rubbing by an ink wiping blade.

An ink jet head with a head chip including a nozzle layer with nozzles for jetting ink and a pressure chamber layer with pressure chambers communicated respectively with the nozzles; and a manifold which stores the ink to be supplied to the pressure chambers; where the head chip has individual communication flow paths which are communicated respectively with the pressure chambers and which are capable of discharging the ink in the pressure chambers; and a common communication flow path which is disposed in a part facing the nozzle layer of the pressure chamber layer and which is connected to the individual communication flow paths to join the ink discharged from the individual communication flow paths together.

A liquid ejection head is manufactured by forming on a substrate an energy generating element for ejecting a liquid, an integrated circuit for driving the energy generating element, a supply port for the liquid so as to penetrate through the substrate, an electrode for generating a liquid flow, and a flow path forming member having an ejection orifice for ejecting the liquid such that a flow path for the liquid is formed between the substrate and the flow path forming member. The electrode is formed over high and low of a stepped shape formed on the substrate in at least one step selected from the steps of forming the energy generating element, forming the integrated circuit and forming the supply port.

An ink jet head includes a nozzle plate substrate having a nozzle for ejecting ink toward a recording medium and an oil repellent film on a surface of the nozzle plate substrate, the surface facing the recording medium. The oil repellent film comprises a fluorine compound having a first end and a second end, the first end comprising a perfluoroalkyl group with 3 to 5 carbon atoms per each molecule of the fluorine compound, and a ratio of a density of CF2 groups in the oil repellent film with respect to a density of CF3 groups in the oil repellent film is between 1.5 and 4.0 as measured by X-ray photoelectron spectroscopic analysis.

An ink jet head includes a nozzle plate substrate having a nozzle for ejecting ink toward a recording medium and an oil repellent film on a surface of the nozzle plate substrate, the surface facing the recording medium. The oil repellent film comprises a fluorine compound having a first end and a second end, the first end comprising a bonding group bonded to the nozzle plate substrate, the second end comprising a perfluoroalkyl group, and the bonding group being bonded to a bonding group of an adjacent fluorine compound bonded to the nozzle plate substrate.

Channel grooves for a discharge channel and a non-discharge channel are formed in the surface of an actuator plate by cutting. The discharge channel includes an extension portion and a raise-and-cut portion, and the non-discharge channel also includes an extension portion and a raise-and-cut portion. In an embodiment, an electrode clearance groove is formed in advance by cutting with a dicing blade or the like. After the electrode clearance groove is formed, an electrode is formed by plating. Since plating is performed after the electrode clearance groove is formed, a clearance groove electrode is integrally formed with an AP-side common pad in the electrode clearance groove, and thus the clearance groove electrode and the AP-side common pad are short-circuited. Thus, an electrode separation portion is formed by cutting a short-circuited portion of the clearance groove electrode and the AP-side common pad through cutting or irradiation with laser.

A droplet deposition head having a fluid chamber connected to a droplet ejection nozzle and to a reservoir for the fluid, and a piezoelectric actuator element formed at least in part by a fluid chamber wall having an electrode thereon, which element is displaceable in response to a drive voltage to generate a pressure in the chamber to eject a droplet of fluid from the chamber through the nozzle wherein the electrode is provided with a passivation coating which comprises, at least in part, a laminate comprising an inorganic insulating layer nearest to or contacting the electrode and an organic insulating layer overlying the inorganic insulating layer wherein defects in the insulating layers tend to be misaligned at the interface there between and wherein the inorganic insulating layer has thickness less than or equal to 500 nm and the organic insulating layer has a thickness less than 3 m.