Abstract: A power supply-heater wiring and a heater-driving circuit wiring for a heater located on the right side of a supply port can be laid out utilizing a beam portion configured to separate supply ports from each other. Furthermore, a plurality of supply ports are provided to supply ink to channels and pressure chambers and separated from one another by beam portions. Thus, an ejection structure such as an ejection opening can be located on both sides of each of the supply ports. Even if the ejection structures are relatively densely arranged, the heaters and the like can have necessary and sufficient sizes and locations without being restricted by the arrangement. A wiring connecting the heater to the power supply wiring or driving circuit is also laid out on the beam portion serving as a partition wall for the supply ports.

Abstract: A printhead is provided having a printhead integrated circuit having ejection nozzles and fluid channels for supplying fluid to the nozzles, a support structure supporting the integrated circuit, the support structure having conduits for supplying fluid to the channels, and a sealing film fixing the integrated circuit to the support structure. The sealing film has apertures providing sealed fluid communication between the conduits and the channels. The channels are divided into isolated channel sections by walls. Each aperture of the sealing film is positioned at one of the walls so as to provide fluid communication to both of the channel sections either side of the respective wall.

Abstract: A liquid ejection head and a method of forming the same. The liquid ejection head includes a substrate, an ejection port, a liquid channel, and a supply port. The substrate has, above one side thereof, an energy generating element configured to generate energy used to eject liquid. The ejection port, from which a liquid is ejected, is located at a position corresponding to the energy generating element. The liquid channel communicates with the ejection port and penetrates the substrate from the one side to another side of the substrate. The supply port communicates with the liquid channel. The substrate has a projecting layer extending inward of an inner peripheral portion of an opening in the supply port in the one side, and the projecting layer and the energy generating element are formed of the same material.

Abstract: The present subject matter relates to a method and system for pulsed air-actuated micro-droplet on demand jetting, especially for jetting high viscosity liquids. A needle extends from a liquid chamber and terminates in a drop-forming orifice outlet from which micro-droplets are generated. At least two air jets direct a timed pulse of air at the drop-forming orifice outlet of the needle. The pulsed air is synchronized with the formation of a desired volume of liquid at the orifice outlet to extract and propel a micro-droplet at high velocity to a substrate. The air jets are turned on prior to the forming of the desired volume at the orifice outlet of the needle, and turned off after the micro-droplet had been produced.

Abstract: A liquid droplet ejecting head of an aspect of the invention includes: a nozzle ejecting a liquid-droplet; a liquid flow path member in which a liquid is supplied toward the nozzle; a back-pressure generating unit applying back-pressure to the liquid in a liquid-flow-path toward the nozzle; a beam member joined together with or including the liquid flow path member, deforming to become concave in a liquid-droplet ejection direction, thereafter undergoing buckling reverse deformation to become convex in the ejection direction, and applying inertia to the liquid near the nozzle in the ejection direction, to cause the liquid near the nozzle to be ejected; an opening disposed on an opposite side of the liquid flow path member in the ejection direction and communicated with the atmosphere; a suction path whose suction opening is directed toward near the nozzle; and a negative-pressure generating unit generating negative-pressure in the suction path.

Abstract: A micro-electromechanical nozzle arrangement for a printhead integrated circuit the nozzle arrangement includes a nozzle chamber bounded by a distal sidewall and a proximal sidewall, and capped by a roof defining an ink ejection port; a paddle located in the nozzle chamber below the ink ejection port; an actuator arm positioned outside of the nozzle chamber in the vicinity of the proximal sidewall, the actuator arm having a fixed end fixed to a substrate of the nozzle arrangement and a working end displaceable towards and away from the substrate; and a motion transmitting structure interconnecting the working end of the actuator arm and the paddle. The motion transmitting structure defines part of the proximal sidewall.

Abstract: A microfluidic device having a substrate with an electrically conductive element made using a conductive ink layer underlying a hydrophobic layer.

Abstract: A thermal inkjet printhead has an array of nozzle arrangements provided for ejecting ink. Each 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 dispenser includes a liquid supply channel including an exit having a cross sectional area, a liquid return channel, and a liquid dispensing channel including a cross sectional area and an outlet opening. The outlet opening includes an end that is adjacent to the liquid return channel. The cross sectional area of a portion of the liquid dispensing channel that is located at the end of the outlet opening is greater than the cross sectional area of the exit of the liquid supply channel. A liquid supply provides liquid under pressure from the liquid supply channel through the liquid dispensing channel to the liquid return channel. A diverter member is selectively actuatable to divert a portion of the liquid toward outlet opening of the liquid dispensing channel.

Abstract: The method of manufacturing a piezoelectric element includes: a lower electrode forming step of forming a lower electrode on a surface of a substrate; a piezoelectric film deposition step of depositing a piezoelectric film made of a piezoelectric material by one of epitaxial growth and oriented growth onto a surface of the lower electrode reverse to a surface adjacent to the substrate; an upper electrode forming step of forming an upper electrode onto a surface of the piezoelectric film reverse to a surface adjacent to the lower electrode; and a polarization direction reversal step of reversing a polarization direction of the piezoelectric film by maintaining, after the upper electrode forming step, a state for a prescribed duration where a temperature of the piezoelectric film is set to a first temperature while application of an electric field to the piezoelectric film in a direction from the upper electrode toward the lower electrode is performed, then keeping the application of the electric field while lo

Abstract: A method of producing an electromechanical transducer includes a first step of partially modifying a surface of a first electrode; a second step of applying a sol-gel liquid including a metal composite oxide to a predetermined area of the partially-modified surface of the first electrode; a third step of performing drying, thermal decomposition, and crystallization on the applied sol-gel liquid to form an electromechanical transduction film; a fourth step of repeating the first, second, and third steps to obtain the electromechanical transduction film with a desired thickness; and a fifth step of forming a second electrode on the electromechanical transduction film.

Abstract: An inkjet printhead integrated circuit includes a substrate; a drive circuitry layer positioned on the substrate, the substrate and the drive circuitry layer defining a plurality of ink inlet channels; nozzle chamber walls positioned on the substrate, the nozzle chamber walls supporting roof structures to define nozzle chambers in fluid communication with the ink inlet channels; ink ejection ports defined in the roof structures; ink ejection members positioned in respective nozzle chambers and displaceable with respect to the roof structures to eject ink from the ink ejection ports; fulcrum formations fast with the substrate, each fulcrum formation having an effort formation on one side and a load formation on an opposite side; and thermal actuators outside of and associated with respective nozzle chambers and connected to the drive circuitry layer to move with respect to the substrate on receipt of electrical signals from the drive circuitry layer.

Abstract: An inkjet printing device includes an ink reservoir containing ink and having an outlet through which the ink passes for ejection onto a print medium; a micro-fluidic actuator having at least (i) an inlet channel through which fluid enters; (ii) a chamber through which the fluid is received from the inlet channel; (iii) an outlet channel that receives the fluid from the chamber and passes the fluid through the outlet channel so that a conduit pathway for the fluid is formed from the inlet channel, chamber and outlet channel; (iv) a flexible member that forms a portion of a wall of the chamber and that displaces in response to fluidic pressure; (v) at least a first valve in the conduit pathway which, when the valve is activated, causes flow of the fluid through the conduit pathway to be altered so that pressure of the fluid passing through the chamber changes which, in turn, causes the flexible member to displace which, in turn, causes the ink to be ejected or not ejected from the ink reservoir according to th

Abstract: A printer includes (a) an ink reservoir containing ink and having an outlet through which the ink passes for ejection onto a print medium; (b) a micro-fluidic actuator having (i) an inlet channel through which fluid enters; (ii) a chamber through which the fluid is received from the inlet channel; (iii) an outlet channel that receives the fluid from the chamber and passes the fluid through the outlet channel so that a conduit pathway for the fluid is formed from the inlet channel, chamber and outlet channel; (iv) a flexible membrane that forms a portion of a shared wall between the chamber and the ink reservoir and that displaces in response to fluidic pressure; (v) at least a first valve in the conduit pathway which, when the valve is activated, causes flow of the fluid through the conduit pathway to be altered so that pressure of the fluid passing through the chamber changes which, in turn, causes the flexible membrane to displace which, in turn, causes the ink to be ejected or not ejected from the ink rese

Abstract: In a method to regenerate during operation ink in nozzles of at least one inkjet print head operating according to drop on demand in an inkjet print apparatus, nozzles of the print head that generate print dots on a printing substrate are activated such that the nozzles output first ink droplets of a predetermined volume in a direction towards the printing substrate. Nozzles that are not being currently used to generate print dots on the printing substrate are activated such that they output at least one second ink droplet of a smaller volume in comparison to the first ink droplets volume. During at least the outputting of the second ink droplet, a suction flow is generated between the inkjet print head and the printing substrate of such strength that the second ink droplet is deflected so it does not arrive at the printing substrate.

Abstract: A liquid discharge recording head includes: a recording element substrate, an electric wiring board, and a supporting plate that supports the recording element substrate and the electric wiring board, wherein a gap is formed between the recording element substrate and the electric wiring board; the liquid discharge recording head further including: a connecting member that electrically connects, across the gap, an electrode provided in the recording element substrate and an electrode terminal provided in the electric wiring board; and a first resin agent that is filled in the gap, a second resin agent that seals the electrode, the electrode terminal, and the connecting member, and a third resin agent that is provided between the first resin agent and the supporting plate and has a lower modulus of elasticity than the first resin agent and the second resin agent.

Abstract: An inkjet printhead with a plurality of nozzle arrangements that each have a nozzle chamber and an ink ejection port that is in fluid communication with the nozzle chamber. The nozzle arrangements also have an actuator configured for rectilinear movement, and an ink-ejecting mechanism configured for angular displacement to eject ink from the ink ejection port. A translation to rotation conversion mechanism is interposed between the actuator and the ink-ejecting mechanism to convert rectilinear movement of the actuator into angular displacement of the ink-ejecting mechanism.

Abstract: There are provided an inkjet head assembly and a method for manufacturing the same. The inkjet head assembly includes: an inkjet head plate having an ink flow passage formed therein and having an actuator formed thereon, the actuator providing driving force for discharging ink; a flexible printed circuit board (FPCB) applying voltage to the actuator; and an intermediate substrate provided so as to electrically connect the actuator to the flexible printed circuit board and having a second bonding portion bonded to the flexible printed circuit board formed inwardly of a first bonding portion, bonded to the actuator in a width direction of the inkjet head plate.

Abstract: A line image forming method includes the steps of: ejecting a plurality of droplets of liquid sequentially from an inkjet head, the liquid containing a functional component; and depositing the droplets of the liquid onto a non-permeable medium, the deposited droplets becoming joined together on the non-permeable medium to form a line pattern of the liquid, wherein a receding contact angle of the liquid with respect to the non-permeable medium being not larger than 10°.

Abstract: An inkjet nozzle assembly includes a nozzle chamber comprising a floor and a roof. The roof has a moving portion which is moveable relative to the floor. A thermal bend actuator is configured for actuating the moving portion. The thermal bend actuator includes an active beam for connection to drive circuitry and a passive beam mechanically cooperating with the active beam. When a current is passed through the active beam, the active beam expands relative to the passive beam resulting in bending of the moving portion towards the floor of the nozzle chamber. The nozzle opening is defined in the moving portion of the roof, such that the nozzle opening is moveable relative to the floor.

Abstract: An inkjet head may comprise an ejection port which ejects ink and an ink flow path which supplies the ink to the ejection port. The inkjet head may also comprise an ejection actuator which supplies ejection energy to the ink in the ink flow path. The ejection energy may cause the ink to be ejected from the ejection port. The inkjet head may also comprise a wall portion. The wall portion may be located at a position farther from the ejection port along the ink flow path with respect to a position at which the ejection energy is supplied. The wall portion may define an inner wall surface of the ink flow path. The wall portion may deform to decrease a cross section of the ink flow path in a direction orthogonal to an ink-flow direction as a temperature of the ink in the ink flow path increases. The wall portion may deform to increase a cross section of the ink flow path in a direction orthogonal to an ink-flow direction as the temperature of the ink in the ink flow path decreases.

Abstract: Laminate manifolds, and their manufacture. The laminate manifolds (18) include plates (20) arranged in parallel, forming a laminate plate stack (22), with a securing agent (24) securing the plates in the plate stack. At least some of the plates incorporate apertures (26) that are oriented in their respective plates so that when the plates are arranged in the laminate plate stack (22), the apertures define a fluidic pathway (28) that emerges from the laminate plate stack between parallel plates. The laminate manifolds are particularly useful as ink manifolds (14) for inkjet printers (10).

Abstract: A liquid ejecting head includes a substrate, a nozzle forming member for forming on a principal surface of the substrate a nozzle comprising a flow passage of liquid and an orifice for ejecting the liquid, and a dummy pattern. The dummy pattern has substantially the same dimension as at least a part of the nozzle and is formed so that a cross-section of the dummy pattern is exposed at an end surface of the nozzle forming member.

Abstract: A heater of a thermal inkjet printhead. The heater is formed of tantalum aluminum oxynitride (Ta—Al—ON), wherein the tantalum aluminum oxynitride is formed of about 30 to about 60 atomic % tantalum, about 10 to about 30 atomic % aluminum, about 5 to about 30 atomic % oxygen, and about 5 to about 30 atomic % nitrogen.

Abstract: An inkjet nozzle includes a first wafer having active drive circuitry together with an ink jet print nozzle formed therein; a second wafer having an ink channel formed therein; and a paddle layer sandwiched between the first and second wafers in a chamber complementarily defined by the wafers. The paddle layer is in signal communication with the active drive circuitry so that ink supplied via the ink channel is ejected via the print nozzle upon actuation of the paddle layer by the circuitry. The first wafer includes a silicon wafer upon which is fabricated an epitaxial boron doped layer, an epitaxial silicon layer, drive transistors and distribution circuitry forming a CMOS logic and drive transistor level, and a silicon nitride layer.

Abstract: A fluid ejection assembly includes a fluid slot, a plurality of drop generators, and a fluid circulation pump to circulate fluid from the fluid slot through each drop generator individually and back into the fluid slot.

Abstract: A sub-carriage includes a housing unit that houses at least part of each of multiple recording heads, and a head passage opening and an upper opening serving as opening portions through which the housing unit passes. A flow channel anchoring member for anchoring a flow channel member is attached to the sub-carriage so as to span across the aforementioned opening portions, and each of the recording heads is sequentially anchored to the sub-carriage to which the flow channel anchoring member has been attached.

Abstract: An ink containment system for an inkjet cartridge, for storing ink for printing, comprises a housing having a plurality of walls. A rigid basin member and a rigid moveable plate are disposed within the housing. A flexible membrane is affixed to a surface of the basin member and to a surface of the plate forming an ink reservoir within the basin member, plate and flexible membrane. A spring-biased mechanism is disposed between the basin member and plate, for biasing the plate apart from the basin member, generating a negative pressure within the ink reservoir and the basin member remaining stationary relative to the movement of the plate.

Abstract: A nozzle arrangement for an inkjet printhead includes an ink inlet; a static ink ejecting member bounding the ink inlet; an active ink ejecting member having a roof defining an ink ejection port and sidewalls depending from the roof towards the substrate, the active ink ejecting member and the static ink ejecting member together defining a nozzle chamber; and an actuator arrangement configured to reciprocate the active ink ejection member relative to the static ink ejecting member to eject ink in the nozzle chamber out through the ink ejection port. The static ink ejecting member is located within bounds delimited by the sidewalls of the active ink ejecting member, the static ink ejecting member includes a sealing structure defined along an edge of the static ink ejecting member and spaced from the sidewall, and the sealing structure is shaped to facilitate a surface tension of a fluid in the variable-volume nozzle chamber to form a fluidic seal between the active and static ink ejecting members.

Abstract: An ink jet printhead includes a plurality of nozzles each having a nozzle aperture; a plurality of bubble forming chambers, each corresponding respectively to one of the plurality of nozzles; an inlet for communicating printing fluid between the nozzle aperture and a printing fluid supply, the inlet and the nozzle aperture being aligned along a common central axis; and a heater element disposed in each of the bubble forming chambers. Each heater element has two bubble nucleation regions suspended within the bubble forming chamber in a plane parallel to that of the nozzle aperture. The two bubble nucleation regions are laterally offset from the central axis, such that the lateral offset of one of the bubble nucleation regions is equal and opposite to the lateral offset of the other bubble nucleation region. The bubble nucleation regions are spaced from each other such that bubbles nucleated at each will grow until they unite to form the gas bubble that causes the ejection of a drop of ejectable liquid.

Abstract: To provide an electrostatic actuator capable of attaining a large diaphragm displacement by low voltage drive. Furthermore, a droplet discharge head provided with this electrostatic actuator, a method for driving a droplet discharge head, and a method for manufacturing an electrostatic actuator are provided. A diaphragm 4, an individual electrode 11 facing the diaphragm 4 with a gap 10 therebetween, while a voltage is applied between the diaphragm 4 and the individual electrode 11, and an insulating film 4a which is disposed on a surface of the diaphragm 4, the surface facing the individual electrode 11, are included, wherein the insulating film 4a is converted to an electret.

Abstract: A system for printing three-dimensional semiconductor products. The system includes printheads for printing various so as to create a three-dimensional structure including cavities, and a robot for incorporating semiconductor objects into the cavities created during the printing process. The robot incorporates the semiconductor objects into the cavities during printing of the three-dimensional structure.

Abstract: A nozzle assembly for an inkjet printhead is disclosed. The nozzle assembly includes an inkjet nozzle having an actuator for ejecting an ink droplet from the inkjet nozzle when a resistive element of the actuator is heated by an electrical current. A drive transistor provides an energy pulse to the resistive element of the actuator upon receipt of a control pulse. Each energy pulse has energy of less than 200 nanojoule.

Abstract: In a droplet ejection head, each of droplet ejection units includes: a nozzle which ejects droplets of liquid, a pressure chamber which is filled with the liquid and connected to the nozzle, a drive element which applies pressure to the liquid inside the pressure chamber, and an individual supply channel and an individual recovery channel which are connected to the pressure chamber. The liquid is supplied to and recovered from the pressure chamber through the individual supply channel and the individual recovery channel. In each of the droplet ejection units, a diameter Dn (?m) of the nozzle, a flow channel resistance R1 (Ns/m5) of the individual supply channel and a flow channel resistance R2 (Ns/m5) of the individual recovery channel satisfy: 3.247×1015 exp(?0.1717 Dn)?R1?3.278×1015 exp(?0.1456 Dn); and 3.247×1015 exp(?0.1717 Dn)?R2?3.278×1015 exp(?0.1456 Dn).

Abstract: A chip used for dispensing a fluid such as ink provides ink-dispensing ejectors having an ink cavity over a supporting substrate, and further provides a heater for heating the ink in the cavity. The heater can be interposed between the substrate and the ink cavity to provide direct heating of ink as it is being dispensed. Various embodiments further comprise the use of the heater structure as a temperature probe to measure the temperature of the ink in the ink cavity. Other embodiments provides a chip having both a temperature probe and a heater as separate structures interposed between the ink cavity and the substrate. Further described is a temperature probe and/or heater which traverses a majority of a width of a substrate, and surrounds each drop ejector on at least two sides.

Abstract: Liquid ejecting apparatuses and image formed methods are provided. In an exemplary embodiment, a liquid ejecting apparatus is provided including a head unit, a movement mechanism, and a control section. The head unit has along a first direction a plurality of heads, in which a plurality of nozzles that eject a liquid onto a medium are lined up in the first direction, and the head unit forms a single raster line by ejecting the liquid while performing m number of movements relative to the medium in a second direction, which intersects the first direction. The movement mechanism causes the head unit to perform a plurality of movements relative to the medium alternately in the second direction and the first direction. The control section forms an image having a resolution that is n times a pitch of the nozzles.

Abstract: An inkjet pen includes a printhead firing chamber, a nozzle plate having at least one nozzle in fluid communication with the firing chamber, and a layer of shipping fluid within the firing chamber and covering the nozzle plate and the at least one nozzle. The shipping fluid has a density that is different than that of the ink that will be ejected from the firing chamber to form an image on media.

Abstract: A nozzle arrangement includes a nozzle chamber having a roof defining an ink ejection port and a floor defining an ink supply inlet; a magnetic coil arrangement positioned around the ink supply inlet of the nozzle chamber; bridge members spanning over the magnetic coil arrangement, the bridge members supported on support posts protruding from the magnetic coil arrangement and having a resilient characteristic; and a paddle containing magnetic material and supported from the bridge members over the ink supply inlet, the paddle having a shape matching that of the ink supply inlet. The bridge members normally support the paddle in an open position spaced from the ink supply inlet. The magnetic coil arrangement is configured to attract the magnetic material of the paddle with a force exceeding the supporting tension of the resilient bridge members.

Abstract: A printhead that has an array of ink ejection nozzles, an array of chambers adapted to store ink for ejection through each of the nozzles respectively, a silicon substrate for supporting the array of chambers and defining a plurality of ink inlet channels for feeding ink to the array of chambers, the silicon substrate having a planar structure with one surface that supports the chambers and an opposing surface from which the elongate ink feed channels extend, a plurality of actuators, one of the actuators being positioned in each of the chambers respectively for ejecting drops of ink through the nozzle, a plurality of ink inlet channels connecting the ink feed channels to the array of chambers and, layers of CMOS drive circuitry supported on the silicon substrate.

Abstract: A printhead is provided having a fluid ejection nozzles which each have a substrate, a layer of drive circuitry deposited on the substrate, and subsequent etchant layers deposited on the drive circuitry to define a nozzle chamber with walls and a roof structure defining a fluid ejection port. Each nozzle also has a stacked capacitive actuator arranged in the chamber. The actuator has alternate electrode plates sandwiched between a compressible polymer, wherein activation of the stacked actuator draws the electrode plates together to compress the polymer storing energy therein, with subsequent de-activation releasing the energy to eject fluid within the chamber from the ejection port.

Abstract: A thermal bend actuator comprises an active beam for connection to drive circuitry and a passive beam mechanically cooperating with the active beam. When a current is passed through the active beam, the active beam expands relative to the passive beam resulting in bending of the actuator. The passive beam comprises a first layer comprised of silicon nitride and a second layer comprised of silicon dioxide. The second layer is sandwiched between the first layer and the active beam to provide thermal insulation for the first layer.

Abstract: An inkjet printhead has an elongate chassis, an ink distribution unit for connection to an ink supply, and a plurality of printhead modules supported along the elongate chassis. The printhead modules each define an elongate array of ink ejection nozzles. During use, the printhead modules are each supplied with ink from apertures in the elongate chassis which are in turn supplied by the ink distribution unit.

Abstract: An inkjet printer that has a printhead IC an array of nozzles for ejecting drops of printing fluid onto a media substrate and drive circuitry for driving the array of nozzles and, a print engine controller (PEC) for sending print data to the printhead IC. The drive circuitry is configured to extract a clock signal from the data transmission from the PEC.

Abstract: An inkjet printhead that has an elongate chassis, first groups of apertures spaced along the elongate chassis, an ink distribution unit defining a plurality of ink distribution passages and second groups of apertures in fluid communication with respective ink distribution passages, the ink distribution unit being mounted to the elongate chassis so that the first group of apertures and the second group of apertures coincide and, a plurality of printhead modules for ejecting ink supplied through the ink distribution passages and the aligned first and second groups.

Abstract: A printhead is provided having a plurality of nozzles defined on a substrate. Each nozzle is configured to hold fluid and has an ejection port and an actuator for moving the nozzle relative to the substrate to eject the held fluid through the ejection port.

Abstract: A liquid ejecting head includes: a flow channel unit including a flow-channel-formed substrate that defines liquid flow channels including pressure chambers communicating with nozzle openings and a sealing plate formed with a diaphragm that varies the capacities of the pressure chambers and a liquid introduction hole, the sealing plate being joined to the flow-channel-formed substrate and defining lines of liquid flow channels including pressure chambers; and a head case including a storage chamber that accommodates a pressure generator for displacing the diaphragm and a case flow channel for supplying liquid to the liquid flow channel of the flow channel unit, the diaphragm being arranged at an opening of the storage chamber on the bottom surface side and the flow channel unit being joined to the head case in a state in which the case flow channel and the liquid flow channel are communicated with each other via the liquid introduction hole, and the sealing plate is formed of a composite plate member formed b

Abstract: A method for forming a floating heater element includes processing a silicon substrate to form a heater stack having the heater element on the substrate with peripheral edge portions, processing the heater stack by depositing and patterning a layer of photoresist or hard mask thereon to substantially mask the heater stack and form a trench through the photoresist or hard mask exposing a surface area of the substrate extending along the peripheral edge portions of the heater element, and processing the masked heater stack and exposed surface area of the substrate by sequentially removing the photoresist and portions of the substrate at the exposed surface area and that underlie the heater element so as to create a well in the substrate undercutting the heater element and open along the peripheral edge portions thereof, the well being capable of filling with a fluid so as to produce the floating heater element.

Abstract: An image forming apparatus performs an image forming operation by driving a ejecting element of a recording head with an ink ejecting drive voltage for ejecting ink, detects a temperature of ink to be flown into the recording head and a temperature of ink to be discharged respectively with a first temperature detection section and a second temperature detection section, and corrects the ink ejecting drive voltage on the basis of a temperature of ink being heat-transferred with the ejecting element, which is estimated with a predetermined conversion formula on the basis of the detected ink temperatures, for controlling an ink amount to be ejected.

Abstract: A micro-fluid ejection head has multiple ejection chips joined adjacently to create a lengthy array across a media to-be-imaged. The chips have fluid firing elements arranged adjacently along corresponding ones of fluid vias skewed variously or not to enable seamless stitching of printed images from the adjacent firing elements. The firing elements are energized to eject fluid and individual ones are spaced according to colors or fluid types. Overlapping firing elements serve redundancy efforts during imaging for reliable print quality. Variable chips sizes and shapes, including chevrons, are disclosed as are relationships between differently colored fluid vias. Skew angles range variously each with noted advantages. Bond pads and overlying encapsulation materials are still other features as are metallization lines for distributing power to ones of firing elements. Singulating chips from larger wafers provide still further embodiments as does increased usage of the wafer.

Abstract: A liquid ejecting head according to the present invention comprises a passage unit and an actuator unit. The passage unit includes: a plurality of liquid passages each of which contains a first opening for ejecting liquid and a pressure chamber connected to the first opening; and a surface having a plurality of second openings by which the pressure chambers are exposed. The actuator unit is fixed to the surface of the passage unit with a binder and covers the second openings. The actuator unit contains a plurality of actuators which face the second openings and apply ejection energy to the liquid inside the pressure chambers, respectively. The passage unit includes a plurality of plates which are stacked one another and have holes structuring the liquid passages. Of the plates, a first plate having the surface and at least another plate adjacent to the first plate have a dummy passage which is not in communication with the liquid passages.