Abstract: A pagewidth printhead includes a printhead controller; a wafer substrate defining a plurality of inlets; and a plurality of micro-electromechanical nozzle arrangements on the wafer substrate and under control of the controller. Each nozzle arrangement includes side walls disposed on the wafer substrate with a roof portion attached to said side walls to define a printing fluid chamber in fluid communication with one inlet, the roof portion defining an ejection port; and at least two heater elements suspended between the side walls in the fluid chamber for forming a vapour bubble in response to electrical actuation energy being applied thereto, whereby a pressure increase in the chamber is effected and fluid in the fluid chamber ejected therefrom via the ejection port. The controller is configured to actuate the at least two heater elements individually to facilitate ejection of weighted ink drop volumes from the nozzle arrangement.

Abstract: An ink jet device including a plurality of ink channels that are arranged side by side and are covered by a flexible sheet, and a corresponding number of actuators are arranged to exert an actuating force onto the sheet through a bump that has a trapezoidal cross-sectional configuration wherein the bumps are formed on the sheet in such an orientation that their trapezoidal cross-section diverges towards the actuator, and the bumps are bonded to the actuators by means of an adhesive.

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: The apparatus and method use an optical feedback system to align a transducer with a stent strut. Once alignment is achieved, the transducer causes a coating to be ejected onto the stent strut and the transducer is moved along the stent strut to coat the stent strut.

Abstract: A liquid-droplet ejection head includes a nozzle substrate, a chamber substrate, a liquid supply substrate, a frame substrate, a driving circuit member, and wire members. The nozzle substrate includes nozzles. The chamber substrate is formed on the nozzle substrate and includes liquid chambers, diaphragms, and electro-mechanical transducers. The liquid supply substrate is formed on the chamber substrate and includes liquid supply channels. The frame substrate is formed on a first face of the liquid supply substrate opposite a second face of the liquid supply substrate formed on the chamber substrate. The driving circuit member that drives the electro-mechanical transducers is mounted on the frame substrate. The wire members connect the electro-mechanical transducers to the driving circuit member. A voltage applied to the electro-mechanical transducers through the wire members deforms the electro-mechanical transducers and the diaphragms to generate pressure in the liquid chambers.

Abstract: A printing system includes a liquid source including a liquid with the liquid including particles. An acoustic transducer is associated with the liquid source. A controller is operably associated with the acoustic transducer and is configured to actuate the acoustic transducer to generate a standing sound wave including a nodal point in the liquid such that the particles are caused to move toward the nodal point of the standing sound wave.

Abstract: A nozzle arrangement is provided for ejecting ink. The nozzle arrangement includes a substrate assembly defining an ink inlet passage. A nozzle chamber structure extends from the substrate assembly to define a nozzle chamber in fluid communication with the ink inlet passage. The nozzle chamber structure defines an aperture through which ink in the nozzle chamber can be ejected. A pair of parallel heater elements extends from the nozzle chamber structure and into the nozzle chamber, and can be supplied with current so that ink in the nozzle chamber is ejected out through the aperture. The nozzle chamber structure defines a protruding rim bounding the aperture and an endless ink collection well surrounding the aperture.

Abstract: A nozzle arrangement is provided for ejecting ink. The nozzle arrangement includes a substrate assembly defining an ink inlet passage. A nozzle chamber structure extends from the substrate assembly to define a nozzle chamber in fluid communication with the ink inlet passage. The nozzle chamber structure defines an aperture through which ink in the nozzle chamber can be ejected. A pair of parallel heater elements extends from the nozzle chamber structure and into the nozzle chamber, and can be supplied with current so that ink in the nozzle chamber is ejected out through the aperture. Each heater element includes an elongate conductor, in turn, having at least one arcuate portion. Each elongate conductor is of substantially uniform diameter and terminates in a pair of enlarged contacts at either end.

Abstract: An inkjet nozzle assembly includes a nozzle chamber comprising a floor and a roof. The roof has a nozzle opening defined therein, and a moving portion moveable towards the floor. The assembly further comprises a thermal bend actuator, defining at least part of the moving portion of the roof, for ejecting ink through the nozzle opening. The thermal bend actuator comprises an upper first beam for connection to drive circuitry and a lower second beam mechanically cooperating with the first beam, such that when a current is passed through the first beam, the first beam expands relative to the second beam resulting in bending of the moving portion towards the floor of the nozzle chamber.

Abstract: A nozzle plate includes a first thermoplastic resin film; a reinforcing plate which is formed of a material having a rigidity higher than that of the first thermoplastic resin film and which has one surface joined to the first thermoplastic resin film; and a second thermoplastic resin film which is joined to the other surface of the reinforcing plate; wherein a nozzle is formed for the first thermoplastic resin film; and through-holes, which are communicated with the nozzle, are formed through the reinforcing plate and the second thermoplastic resin film. Therefore, the nozzle plate can be produced without using any adhesive. Further, the thermoplastic resin films are joined to the both surfaces of the reinforcing plate. Therefore, any warpage is hardly caused in the reinforcing plate and the first and second thermoplastic resin films, which would be otherwise caused by the difference in coefficient of thermal expansion.

Abstract: A piezoelectric actuator includes a first ceramic sheet having individual inner-electrodes formed thereon, a second ceramic sheet having a common inner-electrode formed thereon, a third ceramic sheet having individual surface-electrodes formed thereon, and a fourth ceramic sheet having a plurality of connection electrodes connecting the individual surface-electrodes and the individual inner-electrodes respectively. The connection electrodes have first portions, second portions and third portions respectively, the first portions facing the individual surface-electrodes and arranged at a pitch in a row in a row-direction, the second portions facing the individual inner-electrodes and being arranged in the row-direction to be shifted with respect to the first portions by half the pitch respectively; and the third portions connecting the first portions and the second portions respectively.

Abstract: An ink jet recording head includes an ejection outlet array including a plurality of ejection outlets; an ink flow path portion in fluid communication with the ejection outlets to supply ink to the ejection outlets; a recording element substrate provided with the ejection outlet array, the ink flow path portion and a plurality of ejection heat generating resistors, provided correspondingly to the ejection outlets, for generating thermal energy for ejecting ink; a first warming heat generating resistor which is provided in lower layers of the ejecting heat generating resistors and which is extended below the ink flow path portion; and a second warming heat generating resistor provided in an outer peripheral portion of the recording element substrate.

Abstract: A paired drop ejector includes a chamber having a first wall and a second wall opposite the first wall and a dividing wall disposed between the first and second wall; wherein the first and second wall include a first length and the dividing wall includes a second length less than the first length in which the dividing wall forms first and second portions of the chamber; a first heater disposed in the first portion of the chamber in fluid relation with a first nozzle in which the first heater provides thermal energy to eject a droplet of ink through the first nozzle; and a second heater disposed in the second portion of the chamber in fluid relation with a second nozzle in which the second heater provides thermal energy to eject a droplet of ink through the second nozzle.

Abstract: A piezoelectric device includes a substrate composed of a (110) single crystal silicon, a driver IC formed in the substrate, and a piezoelectric device that is formed above the substrate and is driven by the driver IC, wherein the driver IC has an analog switch including a transistor, the transistor having a channel direction in <001> orientation of the substrate.

Abstract: A fluid ejection device includes a fluid chamber having a first sidewall and a second sidewall, a flexible membrane extended over the fluid chamber and supported at an end of the first sidewall and an end of the second sidewall, an actuator provided on the flexible membrane, a first gap provided between the flexible membrane and the end of the first sidewall, and a second gap provided between the flexible membrane and the end of the second sidewall, and compliant material provided within the first gap and within the second gap. As such, the actuator is adapted to deflect the flexible membrane relative to the fluid chamber.

Abstract: A liquid ejecting head includes plural ejection outlets for ejecting droplets; liquid flow paths in fluid communication with the ejection outlets; and a liquid supply opening for supplying the liquid to the liquid flow paths. The ejection outlets include first and second ejection outlets disposed at least at one side of the liquid supply opening and are staggered. The first ejection outlets are nearer to the liquid supply opening than the second ejection outlets. Each of first recording elements corresponding to the first ejection outlets includes one rectangular heat generating resistor having a long side extending along a direction crossing with an arranging direction of the ejection outlets. Each of second recording elements corresponding to the second ejection outlets comprises plural rectangular heat generating resistors which are adjacent to each other at long sides thereof and are electrically connected in series.

Abstract: A liquid ejection head includes: a flow channel unit having a plurality of pressure chambers arranged in a plane; and piezoelectric actuators which change volume of the plurality of pressure chambers so as to apply pressure to liquid inside the plurality of the pressure chambers respectively, wherein the piezoelectric actuators comprise: a diaphragm which constitutes one wall of the plurality of pressure chambers; a common electrode formed on a surface of the diaphragm; a piezoelectric layer formed on a surface of the common electrode; a plurality of ring-shaped individual electrodes formed on a surface of the piezoelectric layer and formed in regions which overlap respectively with marginal portions which are non-central portions of the plurality of pressure chambers, as viewed from a direction perpendicular to the plane; and central electrodes connected electrically to the common electrode, and formed so as not to make contact with the plurality of ring-shaped individual electrodes in inner regions of the p

Abstract: A method of manufacturing an ink jet print head allows an adhesive bonding a printing element substrate to a support member to be temporarily hardened efficiently and stably in a short time so as to achieve bonding with no air path or the like created at a bonding interface. Electrothermal transducing elements in the printing element substrate generate heat to temporarily harden the adhesive.

Abstract: A nozzle arrangement is provided for ejecting ink. The nozzle arrangement includes a substrate assembly defining an ink inlet passage. A nozzle chamber structure extends from the substrate assembly to define a nozzle chamber in fluid communication with the ink inlet passage. The nozzle chamber structure defines an aperture through which ink in the nozzle chamber can be ejected. A pair of parallel heater elements extends from the nozzle chamber structure and into the nozzle chamber, and can be supplied with current so that ink in the nozzle chamber is ejected out through the aperture. The heater elements include legs embedded within the nozzle chamber structure and terminate in feet embedded within the substrate assembly.

Abstract: An apparatus and method for coating abluminal surface of a stent is described. The apparatus includes a stent support, a coating device, and an imaging system. The coating device includes a solution reservoir and transducer assembly. The transducer assembly includes a plurality of transducers and a controller. Each transducer is used to generate focused acoustic waves in the coating substance in the reservoir. A controller is communicated to an image system to enable the transducers to generate droplets on demand and at the predetermined ejection points on the surface of the coating substance to coat the stent. A method for coating a stent includes stent mounting, stent movement, and droplet excitation.

Abstract: An inkjet head includes an ink passage unit, an actuator unit; a printed circuit board; a metallic bond for electrically connecting a land to a terminal, the metallic bond being disposed in at least one of a region between the land and the terminal and a region extending over the land and the terminal along the peripheries of the land and the terminal; and a protrusion disposed on the connecting portion between a main electrode portion and the land.

Abstract: A printhead is provided for an inkjet printer. The printhead includes a wafer assembly defining spaced groups of ink supply channels. Groups of ink ejection nozzle arrangements extend from the wafer assembly and are in fluid communication with respective ink supply channel groups. Each group of nozzle arrangements includes a pair of rows of nozzle arrangements. Each nozzle arrangement includes an ink ejection head from which an actuator tail extends and is arranged so that actuator tails of one group of nozzle arrangements are interleaved with actuator tails of any adjacent groups of nozzle arrangements.

Abstract: A nozzle arrangement is provided for ejecting ink. The nozzle arrangement includes a substrate assembly defining an ink inlet passage. A nozzle chamber structure extends from the substrate assembly to define a nozzle chamber in fluid communication with the ink inlet passage. The nozzle chamber structure defines an aperture through which ink in the nozzle chamber can be ejected. A pair of parallel heater elements extends from the nozzle chamber structure and into the nozzle chamber, and can be supplied with current so that ink in the nozzle chamber is ejected out through the aperture. Each heater element is shaped to define at least one broken annulus, in turn, comprising said at least one arcuate portion.

Abstract: A liquid ejecting apparatus includes an element substrate having thereon a plurality of heaters for generating energy for ejecting liquid; a plurality of liquid chambers provided on the element substrate and having ejection outlets for ejecting the liquid, wherein a plurality of the heaters are disposed in each of the liquid chambers, and wherein one part of the heaters and the other part of the heaters are switchably operable; and a switching unit for switching between a mode in which the one part of the heaters is actuated as main heaters, and the other part of the heaters stands by as stand-by heaters, and a mode in which the other part of the heaters is actuated as main heaters, and the one part of heaters stands by as stand-by heaters. A center of gravity of the one part of heaters and a center of gravity of the other part of heaters are aligned with each other in a plane of the element substrate, and surfaces of the heaters are protected by an anti-cavitation film comprising metal.

Abstract: A printer fluid dispensing subassembly has a fluid dispensing body having at least one transducer and at least one ink channel, and a compliant polymer aperture film having an array of apertures to direct fluid toward a substrate, the polymer aperture film bonded to the fluid dispensing body as an external layer of the fluid dispensing body, the polymer aperture film arranged to form a wall of a manifold in the fluid dispensing body and to attenuate acoustic energy. A printer fluid dispensing subassembly has a compliant polymer aperture film having an array of apertures to allow fluid to exit the fluid dispensing subassembly, and a fluid dispensing body bonded to a back surface of the polymer aperture film such that the polymer aperture film forms a wall of a fluid manifold, the film being arranged such that a side of the polymer opposite the fluid dispensing body is air.

Abstract: An inkjet printhead and process for producing the same, having at least an auxiliary actuator being added in the inkjet printhead structure, is able to increase the frequency response thereof and to increase the positioning precision and structure rigidity of the inkjet printhead by using a single wafer bonding step in the process of producing the same.

Abstract: A printhead for an inkjet printer comprises a wafer assembly defining spaced apart groups of ink supply channels; and groups of ink ejection nozzle arrangements extending from the wafer assembly and in fluid communication with respective ink supply channel groups, each group of ink ejection nozzle arrangements comprising a pair of rows of ink ejection nozzle arrangements. Each nozzle arrangement includes an ink ejection head from which an actuator tail extends. Each pair of rows of ink ejection nozzle arrangements are arranged such that the ink ejection heads of the ink ejection nozzle arrangements in a first row of the pair face toward and are adjacent to the ink ejection heads of the ink ejection nozzle arrangements in a second row.

Abstract: An object of this invention is to drive different types of printing elements arranged in a printhead by proper powers without increasing the number of signal lines between the printhead and a printing apparatus main body, complicating the circuit configuration, and decreasing the printing speed. For this purpose, time division signals representing two driving periods corresponding to two types of printing elements are supplied to a printhead having the two types of printing elements which require different application powers in order to obtain a desired printing characteristic. Power is applied to the first type printing elements in the first driving period, and power is applied to the second type printing elements in the second driving period.

Abstract: A liquid jet apparatus includes a plurality of nozzles provided to a liquid jet head, an actuator provided corresponding to each of the nozzles, and drive unit that applies a drive pulse to the actuator, wherein the drive unit includes correction value storing unit that stores a drive pulse application timing correction value corresponding to the number of actuators to be driven, and drive pulse application timing correction unit that corrects the drive pulse application timing using the drive pulse application timing correction value corresponding to the number of actuators to be driven stored in the correction value storing unit.

Abstract: A nozzle plate (8) of the present invention is arranged such that, between (i) a first nozzle layer (1) having a first nozzle hole (orifice) (11a) that discharges a liquid substance and (ii) a second nozzle layer (2) having a second nozzle hole (11b) that is connected to the first nozzle hole (11a) and receives the liquid substance, a blocking layer (3) having a higher resistance to etching than the first nozzle layer (1) is provided. In this nozzle plate (8), the blocking layer (3) is locally formed around a connecting part at which the first nozzle hole (11a) is connected to the second nozzle hole (11b). On account of this, the first nozzle hole of the nozzle plate is highly precisely formed, and the deformation of the nozzle plate, e.g. warpage, hardly occurs.

Abstract: An inkjet drop ejection apparatus comprises a chamber with a plurality of nozzles, the plurality of nozzles being grouped in pairs, and a plurality of actuators, each of the plurality of actuators being associated with a pair of nozzles and operable to cause ink to be ejected from either one of the pair of associated nozzles. Each of the plurality of the actuators is provided midway between its associated pair of nozzles, and each of the plurality of actuators is adapted to simultaneously move towards one nozzle of the pair and away from the other nozzle of the pair, whereby ejection of ink through the nozzle towards which the actuator is moving is effected.

Abstract: A manufacturing method that includes the steps of forming an actuator unit, disposing a metallic bond and a thermosetting resin; pressing the land and the terminal; and heating the metallic bond and the thermosetting resin so that the land and the terminal are electrically connected to each other with the metallic bond being disposed in at least one of a region between the land and the terminal and a region extending over the land and the terminal along the peripheries of the land and the terminal, and a protrusion made of the thermosetting resin is formed at least in the connecting portion between the main electrode portion and the land.

Abstract: A printhead is provided for an inkjet printer. The printhead includes a substrate assembly defining ink inlet channels. Endless walls extend from the substrate assembly to surround respective ink inlet channels. Nozzles which, together with respective endless walls, define nozzle chambers in fluid communication with respective ink inlet channels and further define respective nozzle openings through which ink can be ejected. Lever arms extend from respective nozzles. Thermal bend actuators are coupled to respective lever arms and further coupled to respective anchors extending from the substrate assembly at locations external to the walls. The thermal bend actuators are configured to move the nozzles so that the volume of the nozzle chambers varies and ink contained therein is ejected out through the nozzle openings.

Abstract: A nozzle arrangement is provided for ejecting ink. The nozzle arrangement includes a substrate assembly defining an ink inlet passage. A nozzle chamber structure extends from the substrate assembly to define a nozzle chamber in fluid communication with the ink inlet passage. The nozzle chamber structure defines an aperture through which ink in the nozzle chamber can be ejected. A pair of parallel heater elements extends from the nozzle chamber structure and into the nozzle chamber, and can be supplied with current so that ink in the nozzle chamber is ejected out through the aperture.

Abstract: Provided is a printhead arrangement having a number of printhead segments arranged to have overlapping print regions, and a printer controller. The controller includes a sensor for sensing a temperature of the respective segments, said temperature indicative of an extent of the overlapping print regions. The controller is configured to supply the segments with half tone patterns for the regions by means of a dither matrix with an interpolation function, such that VA+VB is greater than V where VA and VB are respective independent dither matrix values of a pair of adjacent printhead segments and V is a continuous tone value to be represented in order to reduce artefacts in the overlapping regions.

Abstract: A printhead for an inkjet printer has a wafer that defines a plurality of nozzle chambers and ink supply channels in fluid communication with the nozzle chambers to supply the nozzle chambers with ink. An ink ejection port is associated with each nozzle chamber. A series of actuators is associated with each nozzle chamber and is radially positioned with respect to the nozzle chamber. The actuators are operable so that, when activated, they are displaced into the nozzle chamber to generate an ink meniscus at the ink ejection port and, when deactivated, return to an original position resulting in the necking and breaking of the ink meniscus to eject an ink drop.

Abstract: A printhead device for transferring liquid droplets from a nozzle includes a liquid source coupled to a nozzle via a microchannel. The nozzle is formed from an orifice having an inner circumferential surface, wherein at least a portion of the inner circumferential surface is serrated. Liquid droplets are transported from the source to the nozzle using a liquid droplet driver (e.g., employing a plurality of driving electrodes). Transfer of droplets to another surface can be accomplished by contacting a bulging droplet in the nozzle with a printing surface. The surface and/or nozzle are then moved relative to one another to effectuate complete transfer of the liquid drop from the nozzle.

Abstract: A printer is provided having a printhead of first and second elongate printhead modules and first and second printer controllers configured to receive print data and process the print data to output dot data to the printhead. The printhead modules are parallel to each other, are disposed end to end on either side of a join region, and are of different lengths. The first printer controller is arranged to output dot data to both the first and second printhead modules and the second printer controller is arranged to output dot data only to the second printhead module. One or more of the printhead modules has at least one row of print nozzles and at least two shift registers for shifting in the dot data to at least one row. Each print nozzle obtains the dot data from an element of one of the shift registers.

Abstract: In an ink-jet apparatus employing an ink-jet head having a plurality of heaters corresponding to one ink ejection opening and performing printing by ejecting an ink from the ink-jet head, timings of bubble forming are mutually shifted at respective heaters of the plurality of heaters upon application of respective pulses to the plurality of heaters and based on information relating to an ink temperature of the ink-jet head. The ejection amount can be controlled by forming bubbles in the ink to eject the ink through the ink ejection opening.

Abstract: A nozzle assembly is provided for an inkjet printer. The nozzle assembly includes a substrate assembly defining an ink inlet channel. An endless wall extends from the substrate assembly in alignment with the ink inlet channel. A nozzle is provided which, together with the endless wall, defines a nozzle chamber arranged to receive ink from the ink inlet channel and further defines a nozzle opening through which ink can be ejected. A lever arm extends from the nozzle. A thermal bend actuator is coupled to the lever arm and is further coupled to an anchor extending from the substrate assembly external to the wall. The thermal bend actuator is configured to move the nozzle so that the volume of the nozzle chamber varies and ink contained therein is ejected out through the nozzle opening.

Abstract: In a liquid discharging method for discharging droplets from a plurality of droplet discharging portions of a liquid discharging head, an actual pattern is created to indicate the discharging states of the droplets from the liquid discharging portions, and information about a defective liquid discharging portion having discharging failure is obtained by checking the discharging states. According to the information, the defective liquid discharging portion is prohibited form discharging, and discharging of droplets from a liquid discharging portion near the defective liquid discharging portion is controlled to reduce the influence of discharging failure of the defective discharging portion, and to correct image information on a recording medium.

Abstract: In a substrate supporting apparatus of a surface potential measuring apparatus, a first fluid is ejected around a target region on an upper surface of a substrate from a circular-shaped first porous member of a first fluid ejection part and a second fluid is ejected onto a lower surface of the substrate from a circular-shaped second porous member of a second fluid ejection part which is opposite to the first fluid ejection part. The substrate can be supported and flattened between the first fluid ejection part and the second fluid ejection part. Also, it is possible to keep the distance between the substrate and the first porous member, with a simple construction. As a result, a probe can be positioned above a flatted target region with leaving a predetermined spacing, to perform measurement of a surface potential of the target region on the substrate with high accuracy.

Abstract: A piezoelectric element includes a base substrate, a buffer layer formed above the base substrate, and a piezoelectric film formed above the buffer layer, wherein the buffer layer is formed of Pb ((Zr1-xTix)1-yNby)O3 of a perovskite type, where x is in a range of 0?x?1, and y is in a range of 0.05?y?0.3, and the piezoelectric film is formed of a relaxor material of a perovskite type.

Abstract: An inkjet printhead and process for producing the same, having at least an auxiliary actuator being added in the inkjet printhead structure, is able to increase the frequency response thereof and to increase the positioning precision and structure rigidity of the inkjet printhead by using a single wafer bonding step in the process of producing the same.

Abstract: A fluid ejection device includes a chamber, a first fluid channel and a second fluid channel each communicated with the chamber, a first peninsula extended along the first fluid channel and a second peninsula extended along the second fluid channel, and a first sidewall extended between the first peninsula and the chamber, and a second sidewall extended between the second peninsula and the chamber. The first sidewall is oriented at a first angle to the chamber and the second sidewall is oriented at a second angle to the chamber such that the second angle is different from the first angle.

Abstract: Some embodiments of the present invention provide a waveguide apparatus for transferring light to a weld area. The waveguide apparatus can include a waveguide comprising a material having a first index of refraction and having at least one wall defining at least one cavity. The assembly can also include a filler material positioned within the at least one cavity and having a second index of refraction less than the first index of refraction. Also, some embodiments of the present invention provide a laser welding assembly in which a waveguide apparatus is used to weld materials, a method of laser welding materials using a waveguide, and a method of manufacturing such a waveguide.

Abstract: A nozzle unit having a nozzle, a flow channel unit having a pressure chamber and a through hole to be communicated with the pressure chamber and an actuator for causing the pressure chamber to discharge ink are respectively formed. The nozzle unit and the actuator have substantially the same planar dimensions. In the nozzle unit, a spacer plate having a communicating hole penetrating in the plate thickness direction corresponding to the nozzle is preliminarily bonded with the first plate, which is to be the nozzle plate, and the nozzle is formed at the first plate material through the communicating hole with laser. The nozzle unit and the actuator which have been respectively formed are bonded with the flow channel unit at positions facing each other simultaneously.

Abstract: A method of manufacturing a bubble-jet type ink jet printhead. The method includes forming resistive heater elements on a substrate, forming a patterned electrode layer on the resultant structure, forming an insulating layer over the resultant structure, forming barrier walls on the resultant structure and attaching a nozzle plate on the resultant structure. The method may further include etching a hole in the insulating layer, forming a second electrode layer over the etched insulating layer to contact the resistive heater elements and forming a second insulating layer thereon, where the barrier walls and then the nozzle plate are formed on top of the second insulating layer. The barrier walls group together resistive heater elements in pairs and form barriers between different pairs of resistive heater elements.

Abstract: There is disclosed an ink jet printhead which comprises a plurality of nozzles (3) and one or more heater elements (10) corresponding to each nozzle (3). Each heater element is configured to heat a bubble forming liquid in the printhead to a temperature above its boiling point to form a gas bubble (12) therein. The generation of the bubble causes the ejection of a drop of an ejectable liquid (such as ink) through the respective corresponding nozzle, to effect printing. The printhead has a plurality of nozzle chambers (7) each corresponding to a respective nozzle, with a plurality of the heater elements being disposed within each chamber. The heater elements within each chamber are formed on different respective layers to one another.

Abstract: There is disclosed a diaphragm structure that includes: a ceramic substrate 3 in which at least one opening 2 is formed, and a thin diaphragm portion 4 having a shape protruding on a side opposite to the opening 2 and constituted of a ceramic fired integrally with the ceramic substrate 3 in such a manner as to cover the opening 2. An opening shape of the opening 2 is a shape including at least one tip portion 5 in a longitudinal direction, having a curved shape, and a tapered portion 6 whose opening width gradually narrows toward the tip portion 5 and which is constituted of a curve or a straight line, and a portion of the diaphragm portion 4 corresponding to the tapered portion 6 has such a shape that a protruding height gradually lowers toward the tip portion 5.