Abstract: A liquid droplet ejection head having: a vibrating plate at which is formed a piezoelectric element which deforms when voltage is applied; a wiring board disposed above the piezoelectric element, an electric wire for deforming the piezoelectric element being disposed at the wiring board; a liquid storage chamber provided at a side opposite to the piezoelectric element, with the wiring board sandwiched therebetween; a pressure chamber provided at a side opposite to the wiring board, with the vibrating plate sandwiched therebetween; an ejection opening that ejects liquid droplets from the pressure chamber; a liquid supply opening that supplies liquid within the liquid storage chamber to the pressure chamber; and an electrical connection portion that passes through the wiring board and electrically connects the piezoelectric element and the electric wire through the liquid supply opening, is provided.

Abstract: An inkjet ejector provides electrical conductors for grounding electrically isolated layers in the ejector while electrically coupling a transducer of the ejector to a firing signal circuit. The inkjet ejector includes a diaphragm plate have a first side and a second side, a plurality of transducers mounted to the first side of the diaphragm plate, a polymer layer located on the second side of the diaphragm plate, an electrically conductive layer that is isolated from electrical ground by the polymer layer, and a plurality of electrical conductors, at least one of the electrical conductors extends from the electrically conductive layer to electrical ground through the polymer layer and other electrical conductors of the plurality of electrical conductors extend from each transducer to a firing signal circuit, the electrical conductor extending from the electrically conductive layer being the same material as the other electrical conductors in the plurality of electrical conductors.

Abstract: The present application is directed to electrostatic actuators, and methods of making electrostatic actuators. In one embodiment, an electrostatic actuator of the present application comprises a first electrode and a second electrode. The second electrode is positioned in proximity to the first electrode so as to provide a gap between the first electrode and the second electrode. The first electrode is capable of being deflected toward the second electrode. A dielectric structure comprising a dielectric landing post is positioned in the gap between the first electrode and the second electrode, the dielectric structure extending over a greater surface of the gap than the landing post. The landing post protrudes out into the gap so as to limit the minimum contact spacing between the first electrode and the second electrode.

Abstract: A piezoelectric element comprising a first electrode, a piezoelectric layer which is composed of a metal oxide containing lead, zirconium and titanium and which formed above the first electrode, and a second electrode formed above the piezoelectric layer. The piezoelectric layer has negatively charged Pb—O complex defects and positively charged Pb—O complex defects, the concentration of the negatively charged Pb—O complex defects being higher than the concentration of the positively charged Pb—O complex defects.

Abstract: An electrostatic actuator includes a fixed electrode formed on a substrate, a movable electrode provided so as to oppose the fixed electrode with a predetermined gap therebetween, a driving unit generating electrostatic force between the fixed electrode and the movable electrode and moving the movable electrode, insulating films provided on opposing faces of the fixed electrode and the movable electrode, at least one of the insulating films having a layered structure of silicon oxide and a dielectric material whose relative permittivity is higher than the relative permittivity of the silicon oxide, and a surface protection film provided one or both of the insulating films and made of a ceramics-based hard film or a carbon-based hard film.

Abstract: A liquid jet head includes: a plurality of unit heads, wherein each of the unit heads has a nozzle forming region and a plurality of nozzle apertures arranged in a first direction in the nozzle forming region, the plurality of unit heads being laminated in a manner that the nozzle forming regions are shifted from one another in a second direction orthogonal to the first direction, wherein the unit heads are laminated in a third direction orthogonal to the first direction and the second direction, and liquid is ejected in a fourth direction between the second direction and the third direction.

Abstract: To prevent an adhesive from flowing into nozzles, there is provided a head chip includes: a plate having a plurality of grooves; a cover plate having an introduction aperture; a nozzle plate fixed to an end surface of the plate, and has nozzles formed at the same intervals; and escape holes formed between the nozzle plate and the plate, each have a contour which surrounds a periphery of each of the nozzles with the contour being spaced apart from a contour of each of the nozzles by at least a given distance, accumulate the adhesive remaining at a time of fixing the nozzle plate therein, and allow the nozzles and the grooves to communicate with each other. The nozzles and the escape holes are so arranged as to be displaced from adjacent nozzles and adjacent escape holes by a given distance in a vertical direction of the nozzle plate.

Abstract: A piezoelectric element comprising a first electrode, a piezoelectric layer which includes bismuth, lanthanum iron, and manganese and which formed above the first electrode and a second electrode formed above the piezoelectric layer. The integrated intensity of a diffraction peak observed at 20°<2?<25° is 90% or more of the sum of the integrated intensities of diffraction peaks observed at 20°<2?<50° in an X-ray powder diffraction pattern of the piezoelectric layer measured at ?=?=0°.

Abstract: A method for manufacturing a piezoelectric element comprising forming a titanium film containing titanium; forming a platinum film containing platinum on the titanium film; forming a piezoelectric precursor film containing bismuth, lanthanum, iron and manganese on the platinum film; crystallizing the piezoelectric precursor film to form a piezoelectric layer by firing the piezoelectric precursor film in an atmosphere of an inert gas; and forming an electrode on the piezoelectric layer.

Abstract: A piezoelectric element comprising a first electrode, a piezoelectric layer containing bismuth lanthanum iron and manganese formed above the first electrode, and a second electrode formed above the piezoelectric layer. The piezoelectric layer contains crystals preferentially oriented in a (111) plane.

Abstract: A piezoelectric element comprising a piezoelectric layer containing bismuth, lanthanum iron manganese and titanium and a electrode formed above the piezoelectric layer.

Abstract: A printhead integrated circuit that has a plurality of nozzles formed on a frontside of a monolithic wafer substrate, the nozzles being arranged in rows extending longitudinally along the substrate. Each nozzle has a respective nozzle inlet extending partially through the monolithic wafer substrate. The integrated circuit also has a plurality of ink supply channels defined in a backside surface of the monolithic wafer substrate which extend longitudinally along the backside of the substrate. Each ink supply channel is deep enough to meet the nozzle inlets such that ink fed to the backside surface of the substrate is supplied to the nozzles on the frontside. The nozzles supplied with ink from one of the ink supply channels are different to the nozzles supplied with ink by another of the ink supply channels such that different ink colors are simultaneously printed. Each ink supply channel is separated into channel sections by one or more transverse walls that structurally stiffen the monolithic wafer substrate.

Abstract: The electrical connection structure includes: a first substrate which has a first electrode part; a second substrate which has a second electrode part opposing the first electrode part, and a wiring pattern connected to the second electrode part; an insulating cavity substrate which is disposed between the first substrate and the second substrate and has a through hole in a position corresponding to the first electrode part, the through hole being deeper that a sum of a height of the first electrode part and a height of the second electrode part and having an opening surface area not smaller that an area of the first electrode part; and conductive material which is filled in the through hole.

Abstract: There is provided an inkjet print head including: a head plate having nozzles arranged in a length direction, in which each of the nozzles ejects ink therethrough from a side surface of the head plate; an ink inlet provided in the lower portion of the head plate and drawing ink therethrough; a pressure chamber storing the ink drawn in through the ink inlet and communicating with the nozzle; and a piezoelectric element supplying the pressure chamber with driving force in a direction perpendicular to a direction of the ink ejected through the nozzle communicating with the pressure chamber and disposed on the pressure chamber having a membrane interposed therebetween.

Abstract: A method for bonding a polymer layer to an outlet plate for an inkjet print head has been developed that enables the polymer layer to be attached to the outlet plate with little or no bowing of the polymer layer. The method includes aligning recesses in a bonding plate with channels in an outlet plate, interposing a polymer layer between the bonding plate and the outlet plate, and pressing the bonding plate against the polymer layer to bond the polymer layer to the outlet plate.

Abstract: A method forms apertures in a polymer aperture plate configured for use in a piezoelectric print head. The method includes bonding a polymer aperture plate to an outlet plate configured with outlets, and aligning a laser with the outlets in the outlet plate to ablate apertures in the polymer aperture plate that are aligned with the outlets.

Abstract: A liquid discharge head according to the present invention comprises plural pressure chambers for applying pressure to liquid, which respectively communicate with liquid discharge openings for discharging liquid; and plural piezoelectric elements, arranged respectively corresponding to the plural pressure chambers, which respectively include lower electrodes, piezoelectric layers and upper electrodes layered in order from the pressure chambers, the lower electrodes being extended to areas corresponding to areas between the plural pressure chambers, and wherein an insulating layer is provided so as to cover at least all the lower electrodes located in the areas corresponding to areas between the plural pressure chambers.

Abstract: A method of driving a piezoelectric actuator which is constituted of a lower electrode film, a piezoelectric film and an upper electrode film that are layered successively onto a diaphragm, includes the step of: applying an electric field to the piezoelectric film in a direction opposite to the orientation direction of the piezoelectric film while continuously changing an intensity of the electric field from a first electric field intensity to a second electric field intensity, the first electric field intensity being smaller than a coercive electric field of the piezoelectric film, the second electric field intensity being larger than the coercive electric field of the piezoelectric film. The piezoelectric film is oriented in the orientation direction from the lower electrode film toward the upper electrode film.

Abstract: A manifold assembly has been constructed that filters ink before the ink enters an inkjet ejector in an inkjet print head. The manifold assembly includes an adhesive layer having openings, an ink manifold layer having a plurality of openings, the openings in the adhesive layer being aligned with the openings in the ink manifold layer, and a polymer layer having a plurality of filter areas, the filter areas being aligned with the openings in the ink manifold layer and the openings in the adhesive layer, the adhesive layer being interposed between the polymer layer and the ink manifold layer.

Abstract: A side-firing printhead comprises a stack that includes a plurality of slices, wherein each slice includes a PCB trigger layer and a diaphragm layer, the PCB trigger layer controls the flow of ink from the diaphragm layer, a first side of the diaphragm layer includes at least one cavity that delivers ink via one or more aperture braces. An aperture plate is coupled to one side of the stack to interface to the diaphragm layers contained therein, wherein the aperture plate contains a plurality of apertures that are located at each aperture brace. A first bracket is disposed on the top of the stack and a second bracket is disposed on the bottom of the stack, wherein at least one fastener couples the second bracket to the first bracket such that a predetermined amount of pressure is applied to the stack.

Abstract: An inkjet ejector has been developed that enables the ejector to be operated at a frequency greater than 80 kHz. The inkjet ejector includes a body layer in which a pressure chamber is configured with an outlet having a volume that is less than a predetermined volumetric threshold, a flexible diaphragm plate disposed on the pressure chamber to form a wall of the pressure chamber, a piezoelectric transducer having a bottom surface attached to the diaphragm plate, and an inlet layer in which an inlet channel is configured to connect the pressure chamber to a source of liquid ink, a cross-sectional area of the inlet channel at the pressure chamber divided by a length of the inlet channel being greater than a predetermined linear threshold.

Abstract: A method for mounting a piezoelectric transducer layer to a diaphragm layer exposes an electrode for each piezoelectric transducer after thermoset polymer filling the interstitial space between the piezoelectric transducers has been cured. The method includes bonding a polymer layer to a diaphragm layer having a plurality of openings, bonding piezoelectric transducers to the diaphragm layer, filling areas between the piezoelectric transducers on the diaphragm layer with thermoset polymer, and removing the thermoset polymer from the piezoelectric transducers with a laser to expose a metal electrode on each piezoelectric transducer.

Abstract: A method for assembling an inkjet jet print head enables piezoelectric transducers to be bonded to an inkjet ejector without closing inlets to a pressure chamber within the inkjet ejector. The method includes bonding a polymer layer to a diaphragm layer having a plurality of openings, bonding piezoelectric transducers to the diaphragm layer with a thermoset adhesive, placing thermoset polymer in areas between the piezoelectric transducers on the diaphragm layer, and drilling inlets through the thermoset polymer and the diaphragm at the openings in the diaphragm.

Abstract: Provided is a thermal inkjet printhead. The inkjet printhead includes a substrate; an insulating layer formed on the substrate; a heater formed on the insulating layer and an electrode to apply current to the heater; a chamber layer that is stacked on the insulating layer and includes an ink chamber; a nozzle layer that is stacked on the chamber layer and includes a nozzle; and at least a heat transfer layer that is formed inside the insulating layer and dissipates heat generated in by the heater toward the substrate.

Abstract: In accordance with the invention, there are jet stacks, ink jet print heads, and methods of making jet stacks and ink jet print heads. The method of making an ink jet print head can include providing a partial jet stack including a diaphragm, a plurality of port holes, and having an ink outlet side and providing a polymer planarized piezoelectric array. The method can also include bonding the polymer planarized piezoelectric array to a side opposite to the ink outlet side of the partial jet stack using an adhesive, wherein the partial jet stack is aligned such that the planarized polymer covers the plurality of port holes, and using the partial jet stack as a mask to extend the port holes through the polymer by ablating the polymer and an excess portion of the adhesive from the ink outlet side using a laser.

Abstract: There is provided an inkjet head including: a flow path plate having a plurality of ink chambers; a nozzle plate having a plurality of nozzles connected to the respective ink chambers in order to eject ink in the ink chambers to the outside; a piezoelectric actuator provided above the ink chambers and controlling pressure of the ink chambers; and a parylene protective film provided in order to prevent oxidization of the piezoelectric actuator.

Abstract: An inkjet printing apparatus according to example embodiments may include a flow channel plate including an ink inlet for introducing ink, a pressure chamber containing the introduced ink, and a nozzle connected to the pressure chamber and configured to eject ink. A piezoelectric voltage applier may apply a piezoelectric driving voltage to the piezoelectric actuator in such a way that the volume of the pressure chamber is reduced so as to eject an ink droplet. An electrohydrodynamic voltage applier may apply a first electrohydrodynamic driving voltage and a second electrohydrodynamic driving voltage to the electrohydrodynamic actuator. The first electrohydrodynamic driving voltage may generate a jet from the ink droplet such that the jet is ejected towards a printing medium, and the second electrohydrodynamic driving voltage (which has an opposite polarity to that of the first electrohydrodynamic driving voltage) may restore the ink droplet to the nozzle.

Abstract: A droplet discharging head comprises: a pressure chamber; a nozzle plate including a penetration part that couples with the pressure chamber and discharges a droplet; and a droplet guidance part having a tip positioned inside the penetration part. The tip of the droplet guidance part is free from touching an inside wall of the penetration part.

Abstract: A micro-fluid ejecting head for use in a micro-fluid ejecting apparatus includes a plurality of micro-fluid ejection devices, a plurality of driver devices for driving the plurality of micro-fluid ejection devices, and a nonvolatile programmable memory matrix. The memory matrix contains embedded programmable memory devices for storing information related to operation of the micro-fluid ejecting head. The memory matrix is configured to communicate with a controller which is external of the micro-fluid ejecting head. The information stored in the memory matrix may include identification information for the micro-fluid ejecting head, alignment characteristics of the micro-fluid ejecting head, information regarding properties of fluid used by the micro-fluid ejecting head, fluid level information, and fluid use information. The external controller accesses the information stored in the memory matrix and controls the plurality of driver devices based on the information accessed from the memory matrix.

Abstract: A piezoelectric actuator may include a piezoelectric layer. The piezoelectric actuator may also include an electrode layer which is disposed on a surface of the piezoelectric layer. The piezoelectric actuator may further include a metal terminal which is disposed on the electrode layer, and configured as a contact point with respect to an external terminal. The piezoelectric actuator may yet further include a metal layer which is disposed between the piezoelectric layer and each of the metal terminal and the electrode layer.

Abstract: An actuator device includes a piezoelectric element including a lower electrode, a piezoelectric layer, and an upper electrode that are displaceably provided in sequence on a substrate. The lower electrode includes a flat center portion and an inclined end portion that descends toward the substrate. The piezoelectric layer is disposed above the lower electrode and the substrate, and includes a first, second, and third piezoelectric layer portion constituted by a plurality of columnar crystals. The columnar crystals of the first and second piezoelectric layer portions are orthogonal to the flat portion of the lower electrode and surface of the substrate, while the columnar crystals of the third piezoelectric layer portion extend orthogonally from a surface of the inclined portion and bend to be orthogonal to the surface of the upper electrode, giving the grains of the columnar crystals of the third piezoelectric layer portion larger widths and increased stress resistance.

Abstract: A side shooting ink ejection device may comprise a front surface, side shooting nozzles having ejection orifices for ejecting fluid, and piezoelectric actuators for moving the fluid through vibration for ejecting the fluid out of the nozzle. The side shooting nozzles may be arranged to eject fluid in a side direction of the piezoelectric actuator. The front surface may comprise recessed portions. The side shooting nozzles may open into the recessed portions so that the ejection orifices are countersunk with respect to the front surface.

Abstract: There is provided a head including a chip 10 that has a semiconductor substrate 11, heating elements 12 disposed on the semiconductor substrate 11, coating layers 14 disposed on the semiconductor substrate 11 and having nozzles 14a arranged in regions above the respective heating elements 12, and individual channels 14b each communicating with the outside and the region above the corresponding heating element 12, wherein the semiconductor substrate 11 does not have a through hole communicating with each individual channel 14b; a ink feed member 21 having a common channel 21b, the ink feed member 21 being bonded to the chip 10 in such a manner that the common channel 21b communicates with the individual channels 14b; and a top 22 disposed on the chip 10 and the ink feed member 21 so as to seal the opening of the common channel 21b.

Abstract: A bonded printhead assembly comprising at least one printhead integrated circuit having a plurality of etched ink supply channels defined in a first bonding surface thereof each ink supply channel extending longitudinally along said first bonding surface a molded ink manifold having a second bonding surface and an adhesive tape sandwiched between the first bonding surface and the second bonding surface said adhesive tape having a plurality of ink supply apertures defined therein.

Abstract: A recording head includes a recording element substrate having a discharge port facilitating discharging a liquid droplet, an energy generating element configured to generate energy for liquid discharge, and a supply opening facilitating supplying the discharge port with a liquid. The recording head also has a support member having a supply path formed by laminating a plurality of plate-shaped members including an opening portion. The support member supports the recording element substrate and includes a chamber communicating with the supply path and adapted to hold air.

Abstract: A printhead has an aperture plate on a front side of the printhead, a diaphragm plate on a back side of the printhead, a body intermediate the aperture plate and the diaphragm plate, a chamber disposed within the body, a port boundary defining a port area, the port boundary disposed on the diaphragm plate and adjacent the chamber, a peripheral partially-etched region coinciding with a first portion of the port boundary, and a peripheral non-etched region coinciding with a second portion of the port boundary, wherein the port boundary is fractured at the partially etched peripheral portion and bent at the non-etched peripheral portion, the non-etched peripheral portion structured to prevent separation of the diaphragm plate and a leaflet defined by the partial-etched portion.

Abstract: An electrostatic inkjet head providing high pressure to ink in order to enable high quality printing. The electrostatic actuator providing the pressure to the membrane (200) compressing the ink in a chamber (50) with an opening (20) is characterized by an overlapping area of the actuation electrode (300) and the moveable electrode (500) not determined by the area of the membrane (200) covering the chamber (50) with the ink. The maximum pressure that can be applied can be adapted by means of the ratio of the overlapping area (220) of the two electrodes and the area (210) of the membrane (200) covering the chamber (50) with the ink. Use of said head to eject a liquid drug used in an injection system.

Abstract: A plurality of application specific integrated circuit (ASIC) chips with different functions is provided. Each of the ASICs performs one or more functions along an ultrasound data path. The chips include communications protocols or processes for allowing scaling. For example, ASICs for backend processing include data exchange ports for communicating between other ASICs of the same type. As another example, receive beamformer ASICs cascade for beamformation. By providing ASICs implementing many or most of the ultrasound data path functions, with scalability, the same ASICs may be used for different system designs. A family of systems from high end to low-end using the same types of ASICs, but in different configurations, is provided.

Abstract: Provided is a liquid jet head (1) capable of reducing stagnation of a liquid in grooves (5) formed in a piezoelectric plate (4). The head has that a nozzle plate (2), the piezoelectric plate (4) joined onto the nozzle plate (2), and a cover plate (8) including a liquid supply hole (9) and a liquid discharge hole (10) are laminated. The grooves (5) include deep groove (5a) and shallow groove (5b). The deep groove (5a) has a cross-section which has a convex shape in a depth direction. The deep groove (5a) and a nozzle (3) are communicated at a tip of the convex shape; and the cover plate closes opening portions of the shallow grooves (5b) opened to one surface of the piezoelectric plate, to thereby cause the deep groove (5a) to be communicated to the liquid supply hole and the liquid discharge hole.

Abstract: A liquid droplet ejecting head includes a fluid path forming substrate having a fluid path communicating with nozzle holes and a diaphragm on the fluid path forming substrate. The diaphragm has a first surface facing a second surface. A piezoelectric element on the first surface of the diaphragm has a piezoelectric body layer interposed between a first electrode and a second electrode. A support substrate on the first surface of the diaphragm has a space for containing the piezoelectric element. The support substrate includes a first member formed on the first surface of the diaphragm, and a second member formed on the first member. The first member has a first opening for containing the piezoelectric element. The space of the support substrate is defined by the first opening of the first member and the second member. The main material of the first member is resin.

Abstract: A liquid-ejecting head includes a pressure-generating chamber communicating with a nozzle opening, and a piezoelectric element. The piezoelectric layer contains a perovskite complex oxide containing Bi, La, Fe, and Mn and is ferroelectric.

Abstract: Provided is a liquid jet head (1) capable of reducing stagnation of a liquid in grooves (5) formed in the piezoelectric plate (4) and of quickly discharging foreign matters entered and mixed into the elongated grooves (5). The liquid jet head (1) has a structure in which a nozzle plate (2) including a nozzle (3), a piezoelectric plate (4) for joining the nozzle plate (2), and a cover plate (8) including a liquid supply hole (9) for supplying the liquid and a liquid discharge hole (10) for discharging the liquid are stacked. The elongated groove (5) has a cross-section having a convex shape in the depth direction. The elongated groove is communicated, at a tip of the convex shape, to the nozzle (3). The elongated groove is communicated, in a bottom portion of the convex shape, to the liquid supply hole (9) and the liquid discharge hole (10).

Abstract: A liquid-ejecting head includes a pressure-generating chamber communicating with a nozzle opening, and a piezoelectric element. The piezoelectric element has piezoelectric layer contains a perovskite complex oxide containing Bi, La, Fe, and Mn and can undergo electric-field-induced phase transition.

Abstract: A fluid dispensing assembly having a fluid dispensing subassembly to deliver fluid to a substrate, an external manifold to supply fluid having a first wall arranged adjacent to the fluid dispensing subassembly, and a compliant wall attached to a second wall arranged opposite the first wall, the compliant wall to confine the fluid to chambers in the manifold and to provide compliance for acoustic attenuation. A fluid dispensing assembly having an external manifold having at least one opening in a back side opposite a fluid dispensing subassembly side, the fluid dispensing subassembly side being in contact with fluid, and a compliant wall adhered to the external manifold on the back side.

Abstract: A droplet ejection head according to the present invention includes a layered body made up of a plurality of metal plates, and an ejection face. The plurality of metal plates in the layered body include n metal plates whose lengthwise directions form the same angle with a rolling direction thereof. The n metal plates include a first stress plate and a second stress plate. The first stress plate has internal stress which forces the metal plate to bend along its lengthwise direction so as to make it protrude toward a ejecting direction. The second stress plate has internal stress which forces the metal plate to bend along its lengthwise direction so as to make it protrude toward a direction opposite to the ejecting direction.

Abstract: In an apparatus and a method for the printing of spacers in a pattern on substrates of display panels, a printer head includes a plurality of nozzle holes. Each printer head includes a nozzle group having a plurality of nozzle holes. A nozzle group may be selected by the conduction wirings on the vibration membrane and top plate sandwiching the piezoelectric actuators. To print complex patterns on the substrate a plurality of printer head sets, a plurality of printer heads in a line, can be arranged in various configurations.

Abstract: A liquid discharging head and an image formation apparatus are disclosed. The liquid discharging head includes a base member that has a joining surface, to which a piezoelectric device is joined, and a bottom surface. The width of the joining surface in longitudinal directions of a liquid chamber is less than the width of the bottom surface in the longitudinal directions of the liquid chamber; accordingly, the area of the joining surface is less than the area of the bottom surface.

Abstract: A liquid transporting apparatus which transports a liquid includes a channel unit having a surface which is electroconductive and a liquid channel which includes a pressure chamber; a piezoelectric actuator applying a pressure to the liquid in the pressure chamber and having a piezoelectric layer arranged to face the surface of the channel unit and to cover the pressure chamber, electrodes which are arranged in the piezoelectric layer to face the pressure chamber, and a first isolating film arranged between the piezoelectric layer and the surface of the channel unit to cover the pressure chamber; and a deterioration detecting mechanism detecting a deterioration of the first isolating film and having a second isolating film which is electroconductive and stacked on a surface, of the first isolating film, on a side of the piezoelectric layer, and which is insulated from both the electrodes and the channel unit.

Abstract: A liquid discharging head includes a channel unit formed of a plurality of stacked plates having openings and a liquid channel formed of the openings of the stacked plates. A curing material is filled in a step formed due to shift of the openings provided in the adjacent plates respectively, and the curing material forms part of an inner surface of the liquid channel. Consequently, the channel inner surface becomes smooth, and a liquid discharging head with little residual bubbles and with excellent bubble discharging capability is provided. Further, the attenuation of a pressure wave due to the step can be prevented.

Abstract: A piezoelectric layer is provided on a vibration plate which covers a plurality of pressure chambers extending in a predetermined direction. The piezoelectric layer has a first area corresponding to a central portion in a width direction of each of the pressure chambers and a second area corresponding to both sides in a longitudinal direction of an inner peripheral portion of each of the pressure chambers. A head for a liquid-droplet jetting apparatus which has the piezoelectric layer is prepared, and when the head is driven, a first driving step for applying a drive voltage to the second area, and the first area corresponding to a pressure chamber which does not jet a liquid droplet is carried out. Thereafter, a second driving step for applying a drive voltage to the first area corresponding to a pressure chamber which discharges the liquid droplet is carried out.