Abstract: A liquid jet head has side walls forming grooves and drive electrodes formed on wall surfaces of the side walls. A reinforcing plate includes through holes communicating with the grooves and being elongated in a longitudinal direction of the grooves. A nozzle plate includes nozzles communicating with the through holes of the reinforcing plate. A cover plate has a supply port for supplying liquid to the grooves and a discharge port for discharging liquid from the grooves.

Abstract: An ink jet recording head includes a nozzle array and discharge energy generation elements. The nozzles include discharge ports to discharge liquid when recording, pressure chambers to communicate with respective discharge ports, and liquid flow paths to supply liquid to the respective pressure chambers. The discharge energy generation elements apply discharge energy to the pressure chambers to discharge liquid from the nozzles in a predetermined order during time-division driving. Arranging intervals of the liquid flow paths take at least two different values. When a drive timing difference average between the adjacent discharge energy generation elements is calculated by a particular expression, a relationship of D?Y is satisfied between an interval D and an interval Y in a k-th discharge energy generation element and a k+1-th discharge energy generation element positioned adjacent to the k-th discharge energy generation element.

Abstract: Disclosed herein is a liquid ejecting head in which a liquid introducing portion includes a liquid introducing flow passage which introduces a liquid from a liquid storage member having the liquid stored therein, a bubble chamber which accommodates a bubble entrained into the liquid introducing flow passage and a filter that is provided at a bottom of the bubble chamber, and a liquid ejecting head main body which introduces the liquid from the liquid introducing portion to a pressure chamber through a liquid flow passage and is able to discharge the liquid in the pressure chamber from nozzles as liquid droplets, wherein a lyophobic region having a lyophobic property is provided on a surface of the filter facing the bubble chamber side.

Abstract: Disclosed is an ink-jet head that can suppress occurrence of the crosstalk and facilitate a smooth ink circulation in pressure chambers. The ink jet head includes two or more pressure chambers 110 configured to be supplied with ink and each having a nozzle; ink supply channel 101 communicating with each of pressure chambers 110 and configured to allow the ink to flow to each of pressure chambers 110; ink discharge channel 102 communicating with each of pressure chambers 110 and configured to allow the ink discharged from each of pressure chambers 110 to flow; ink inlet channel 107 connecting each of pressure chambers 110 to ink supply channel 102; ink outlet channel 108 connecting each of pressure chambers 110 to ink discharge channel 102. An inner surface of ink outlet channel 108 includes unevenness 109.

Abstract: A liquid dispenser includes a liquid supply channel, a liquid return channel, and a liquid dispensing channel. The liquid dispensing channel includes a wall. The wall includes a surface. A portion of the wall defines an outlet opening. The outlet opening includes a downstream edge relative to a direction of liquid flow through the liquid dispensing channel. The downstream edge is perpendicular to the surface of the wall of the liquid dispensing channel. A liquid supply provides liquid that flows from the liquid supply channel through the liquid dispensing channel to the liquid return channel. A diverter member selectively diverts a portion of the flowing liquid through the outlet opening of the liquid dispensing channel.

Abstract: A method of manufacturing a liquid ejection head includes: defining a first imaginary reference line along the longitudinal direction of a base member and measuring the distances between the first imaginary reference line and at least two liquid supply port portions of a liquid supply port row, including defining a second imaginary reference line passing the liquid supply port portion at the shortest distance from the first imaginary reference line and the liquid supply port portion at the longest distance from the first imaginary reference line respectively from among the at least two liquid supply port portions and defining the second imaginary reference line between two imaginary lines parallel to the first imaginary reference line.

Abstract: Provided is a method of manufacturing a liquid discharge head including: forming a first pattern for forming the flow path on the substrate; forming a first coating layer which covers the first pattern; forming a hole in the first coating layer, through which the first pattern is exposed; forming a second pattern for forming the flow path on the first coating layer, such that the second pattern contacts with the first pattern through the hole; forming a second coating layer for covering the second pattern; forming the discharge port in the second coating layer; and removing the first pattern and the second pattern to form the flow path.

Abstract: An ink jet print head having a reduced size still can prevent an overall temperature increase in a printing element board. To this end, among ink supply port arrays formed on both sides of each nozzle array, the heat resistance of the portion (beams) of the printing element board between the adjoining ink supply ports is lowered in those arrays that are close to the end portions of the common liquid chamber. In one embodiment, the volume of the beams is greater in those arrays that are close to the end portion.

Abstract: The invention is directed to a method of working a small recess portion. In the method, prior to press-forming small recess portions arrayed in a row by pressing a predetermined number of pieces of aligned male dies to a metal base plate, the metal base plate is previously formed with a highly rigid portion at a predetermined portion at a vicinity of an imaginary line extending in a row direction along end portions of predicted press portions to which the respective male dies are pressed.

Abstract: A liquid ejecting head includes a flow path unit that has a nozzle line formed by a plurality of nozzles and includes a flow path communicating with the nozzles, a head case that forms a shared liquid flow path for supplying a liquid to the flow path of the flow path unit and is connected with the flow path unit, and a sheet-like heater that is mounted on a side surface of the head case and has a continuous heat-generatable heating element folded multiple times. A portion of the heating element located in a region close to a position opposing the shared liquid flow path is narrower than a portion of the heating element located at a position other than the region.

Abstract: An ink jet recording head capable of maintaining ink supply capability for a long period of time includes a substrate provided with a plurality of energy generating elements and an ink supply port, and a flow path member which has a plurality of discharge ports, a plurality of ink flow paths in communication with the plurality of discharge ports, and a common liquid chamber in communication with the plurality of ink flow paths. The common liquid chamber is divided into a discharge port area and a drainage port area, and the ink flows into the discharge port area through a filter. In the case where a smallest diameter among the diameters of the discharge ports and the diameters of the ink flow paths is denoted by A and a largest diameter of openings of the filter is denoted by B, A?B is satisfied.

Abstract: A method for forming a self-aligned hole through a substrate to form a fluid feed passage is provided by initially forming an insulating layer on a first side of a substrate having two opposing sides; and forming a feature on the insulating layer. Next, etch an opening through the insulating layer, such that the opening is physically aligned with the feature on the insulating layer; and coat the feature with a layer of protective material. Patterning the layer of protective material will expose the opening through the insulating layer. Dry etching from the first side of the substrate forms a blind feed hole in the substrate corresponding to the location of the opening in the insulating layer, the blind feed hole including a bottom. Subsequently, grind a second side of the substrate and blanket etch it to form a hole through the entire substrate.

Abstract: A printer includes a printhead die including liquid ejectors separated by walls. Each liquid ejector includes a nozzle orifice and an associated drop forming mechanism. First and second liquid feed channels, extending in opposite directions, are in fluid communication with each liquid ejector. A liquid inlet includes a plurality of first and second segments in fluid communication with the first liquid feed channels and the second liquid feed channels, respectively. The first and second segments are located on opposite sides of the nozzle orifice. For a given liquid ejector, both of the first and second segments are directly in line with the liquid ejector. An electrical lead extends from each drop forming mechanism toward an edge of the printhead die. At least one of the electrical leads is positioned between neighboring segments of at least one of the first and second segments of the liquid inlet.

Abstract: A liquid dispenser includes a liquid supply channel, a liquid return channel, and a liquid dispensing channel. The liquid dispensing channel includes a first wall. A portion of the first wall defines an outlet opening. The liquid dispensing channel includes a second wall opposite the first wall. The second wall of the liquid dispensing channel extends along a portion of the liquid supply channel and along a portion of the liquid return channel. A liquid supply passage extends through the second wall and is in fluid communication with the liquid supply channel. A plurality of liquid return passages extends through the second wall and is in fluid communication with the liquid return channel. A liquid supply provides liquid that flows from the liquid supply passage through the liquid supply channel, through the liquid dispensing channel, and through the liquid return channel to the plurality of liquid return passages.

Abstract: A wide-array inkjet printhead assembly with die carriers includes a backbone which delivers fluid through a manifold with a number of openings. The openings are spaced apart according to a opening pitch. A plurality of inkjet die includes trenches with a trench pitch which is smaller than the opening pitch. A plurality of die carriers include a plurality of oblique tapered channels, with one end of the oblique tapered channels having pitch matching the opening pitch and interfacing with the backbone and the opposite end of the oblique tapered channels having a pitch matching the trench pitch and interfacing with the inkjet die. A method for assembling a wide-array inkjet printhead assembly is also described.

Abstract: A printhead (10) for use in an inkjet printing process includes a substrate (12) having at least one ink feed opening (14) defined therein, an ink chamber (16) in operative and fluid communication with the ink feed opening(s) (14), and a nozzle plate (18) disposed on a portion (P1) of the substrate (12). The nozzle plate (18) has a plurality of orifices (20) defined therein. The printhead (10) further includes a firing resistor (22) disposed on another portion (P2) of the substrate (12) and proximate to the ink feed opening(s) (14) and a barrier structure (24) disposed on the other portion (P2) of the substrate (12) and positioned adjacent to the firing resistor (22).

Abstract: The dimensions/shape of ink flow channels in a recording head are designed so that when the inertance of nozzles is represented by Mn, the inertance of the ink supply channels is represented by Ms, the combined resistance obtained by combining the flow channel resistance in the nozzles, the flow channel resistance in pressure chambers, and the flow channel resistance in the supply channels is represented by R, and a unique vibration cycle of the pressure fluctuation arising in the ink within the pressure chambers is represented by Tc, the following Equation (A) holds true.

Abstract: A liquid dispenser is provided that includes a liquid supply channel, a liquid dispensing channel, and a liquid return channel. The liquid dispensing channel includes a wall. The wall includes a surface. A portion of the wall defines an outlet opening that includes a downstream edge relative to a direction of liquid flow through the liquid dispensing channel. The downstream edge is perpendicular to the surface of the wall of the liquid dispensing channel. A liquid is provided that flows from the liquid supply channel through the liquid dispensing channel to the liquid return channel. A liquid drop is caused to be ejected from the outlet opening of the liquid dispensing channel by selectively actuating a diverter member to divert a portion of the flowing liquid through the outlet opening of the liquid dispensing channel.

Abstract: A liquid ejecting apparatus, including: a tank for storing a liquid; a liquid ejecting head that includes an inner passage having an inlet and an outlet and individual liquid channels; a supply passage connecting the tank and the inlet; a return passage connecting the tank and the outlet; a supply device to forcibly supply the liquid in the tank to the inner passage; a restrictor valve to restrict a liquid amount flowing through the return passage; and a discharge controller to drive the supply device while opening the restrictor valve, such that liquid circulation is conducted in which the liquid in the tank returns back thereto via the supply passage, the inner passage, and the return passage, in order, and configured to control the valve to restrict, during the liquid circulation, the liquid amount flowing through the return passage, for permitting a discharge of the liquid from the ejection openings.

Abstract: A liquid dispenser is provided that includes a liquid supply channel, a liquid dispensing channel, and a liquid return channel. The liquid dispensing channel includes a first wall. A portion of the first wall defines an outlet opening. The liquid dispensing channel includes a second wall opposite the first wall. The second wall of the liquid dispensing channel extends along a portion of the liquid supply channel and along a portion of the liquid return channel. A liquid supply passage is provided that extends through the second wall and is in fluid communication with the liquid supply channel. A plurality of liquid return passages are provided that extend through the second wall and are in fluid communication with the liquid return channel. A liquid is provided that flows from the liquid supply passage through the liquid supply channel through the liquid dispensing channel through the liquid return channel to the plurality of liquid return passages.

Abstract: An inkjet nozzle assembly includes a nozzle chamber having a planar roof spaced apart from a floor. A heater element is suspended in the nozzle chamber and is configured as a planar beam extending longitudinally and parallel with a plane of the roof. A nozzle aperture defined in the roof has a centroid offset from a longitudinal centroid of the planar beam.

Abstract: A liquid dispensing system includes a liquid dispenser array structure. A first liquid supply provides a carrier liquid that flows continuously through an outlet of a liquid dispensing channel during a drop dispensing operation. A plurality of liquid dispensers, located on a common substrate, includes a second liquid supply that provides a functional liquid, immiscible in the carrier liquid, to the liquid dispensing channel through a liquid supply channel. A drop formation device, associated with an interface of the liquid supply channel and the liquid dispensing channel, is selectively actuated to form discrete drops of the functional liquid in the carrier liquid flowing through the liquid dispensing channel. A receiver conveyance mechanism and the liquid dispenser array structure are positioned relative to each other such that the discrete drops of the functional liquid are applied to a receiver.

Abstract: A liquid dispenser array structure includes a liquid dispensing channel. A first liquid supply provides a carrier liquid that flows continuously through an outlet of the liquid dispensing channel during a drop dispensing operation. A plurality of liquid dispensers, located on a common substrate, includes a liquid supply channel and a second liquid supply that provides a functional liquid, immiscible in the carrier liquid, to the liquid dispensing channel through the liquid supply channel. A drop formation device, associated with an interface of the liquid supply channel and the liquid dispensing channel, is selectively actuated to form a discrete drop of the functional liquid in the carrier liquid flowing through the liquid dispensing channel.

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 method of continuously ejecting liquid includes providing a liquid ejection system that includes a substrate and an orifice plate affixed to the substrate. Portions of the substrate define a liquid chamber. The orifice plate includes a MEMS transducing member that extends over at least a portion of the liquid chamber. A compliant membrane is positioned in contact with the MEMS transducing member. The compliant membrane includes an orifice. Liquid is provided under a pressure sufficient to eject a continuous jet of the liquid through the orifice located in the compliant membrane of the orifice plate by a liquid supply. A drop of liquid is caused to break off from the liquid jet by selectively actuating the MEMS transducing member which causes a portion of the compliant membrane to be displaced relative to the liquid chamber.

Abstract: A method for manufacturing a discharge port member used in a liquid discharge head, comprising in the following order, preparing a substrate at least whose surface is conductive, the substrate having, formed on said surface, a first insulating resist for forming a discharge port and a second insulating resist for forming a recessed portion of a wall of a flow path, forming on surface a first plating layer by plating using said first resist and said second resist as a mask, removing said second resist, forming a second plating layer on an exposed portion of said substrate from which said second resist has been removed, said second plating layer being formed by plating using said first resist as a mask, said second plating layer forming said recessed portion of said wall, and removing said first resist to form said discharge port and removing said substrate.

Abstract: A method of ejecting liquid includes providing a liquid dispenser including a substrate and a diverter member. Portions of the substrate define a liquid supply channel and a liquid return channel. The diverter member includes a MEMS transducing member positioned in contact with a compliant membrane. The compliant membrane is anchored to the substrate such that the compliant membrane forms a portion of a wall of the liquid dispensing channel. A continuous flow of liquid is provided from a liquid supply through the liquid supply channel through the liquid dispensing channel through the liquid return channel and back to the liquid supply. The diverter member is selectively actuated to divert a portion of the liquid flowing through the liquid dispensing channel through outlet opening of the liquid dispensing channel when drop ejection is desired.

Abstract: A head unit fixed to a case in a position in which a nozzle forming surface thereof faces a first surface side of a head fixing portion, and a wiring substrate is arranged on a second surface side opposite from the first surface on a portion. A supply flow channel in the case communicate with a common liquid chamber at an end portion of the communicating flow channel in a first direction, and a flexible cable is disposed inside the supply flow channel in the case in the first direction.

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: Disclosed is an inkjet printhead that includes a plurality of fluid ejecting chips arranged in a plurality of rows. The plurality of fluid ejecting chips includes a first set of fluid ejecting chips arranged in a first row of the plurality of rows. The plurality of fluid ejecting chips includes a second set of fluid ejecting chips arranged in a second row parallel to the first row of the plurality of rows. Each fluid ejecting chip of the second set of fluid ejecting chips is configured between two consecutive fluid ejecting chips of the first set of fluid ejecting chips in a predetermined orientation. The inkjet printhead further includes a plurality of fluid vias and a plurality of bond pads. Further disclosed are fluid ejecting chips for being used in an inkjet printhead.

Abstract: A method of ejecting a liquid includes providing a liquid dispenser including a substrate. A first portion of the substrate defines a liquid dispensing channel including an outlet opening. A second portion of the substrate defines a liquid supply channel and a liquid return channel. A diverter member is positioned on a wall of the liquid dispensing channel that includes the outlet opening. The diverter member includes a MEMS transducing member anchored to the wall of the liquid dispensing channel. A compliant membrane is positioned in contact with the MEMS transducing member. The diverter member is selectively actuated to divert a portion of the liquid flowing through the liquid dispensing channel through outlet opening of the liquid dispensing channel.

Abstract: An ink introducing port is provided on the upstream side of the center of a row of pressure chambers in the direction of gravity g, the pressure due to ink introduction is applied to a region where the influence by the head is small.

Abstract: A liquid ejection head includes an ejection element substrate having an energy generating element, an ejection orifice for ejecting a liquid, and a liquid supply port communicatively connected to the ejection orifice; and a support member supporting the ejection element substrate and having a liquid guide path for supplying the liquid to the liquid supply port. The support member is formed by baking a laminate including at least one guide path plate having a through-hole for constituting a part of the liquid guide path, a filter plate having an opening for disposing a filter member for filtering the liquid, and a filter member disposed in the opening.

Abstract: A liquid ejector includes a structure defining a plurality of chambers with one of the chambers including a first and second surface. The first surface includes a nozzle orifice. A drop forming mechanism is located on the second surface of the chamber opposite the nozzle orifice. First and second liquid feed channels are in fluid communication with the chamber. First and second segments of a segmented liquid inlet are in fluid communication with the first and second liquid feed channels, respectively. The first and second segments of the segmented liquid inlet are also in fluid communication with another one of the plurality of chambers. Liquid is provided to the chamber through the first and second liquid feed channels from the segmented liquid inlet. A drop of the liquid is ejected through the nozzle orifice of the chamber by operating the drop forming mechanism.

Abstract: A liquid ejection head includes a head main body which discharges liquid, a flow path member main body on which a liquid reception member for receiving liquid supplied from the outside is formed, a first case, a second case, and a first insertion portion which is provided on the flow path member main body and through which a securing member for securing the first case, the second case, and the flow path member main body to one another is inserted. In the liquid ejection head, the first insertion portion is formed such that the outer wall covers an exposing portion from which the securing member is exposed.

Abstract: Disclosed is a fluid ejection device that includes a nozzle plate. The nozzle plate includes a plurality of nozzles for fluid ejection. Further, the fluid ejection device includes a substrate disposed below the nozzle plate. The substrate includes a top surface adapted to adhere to the nozzle plate. The substrate also includes at least one fluid via configured within the substrate for providing fluid to the plurality of nozzles of the nozzle plate. Furthermore, the fluid ejection device includes at least one supporting structure configured within each fluid via of the at least one fluid via. The at least one supporting structure is further configured at a predetermined depth from the top surface of the substrate to regulate the flow of the fluid from the at least one fluid via to the plurality of nozzles. Further, disclosed is a method to fabricate the fluid ejection device.

Abstract: An inkjet head according to an aspect of the invention may include: a flow path plate having a plurality of ink chambers; a nozzle plate having a plurality of nozzles connected to the ink chambers in order to eject ink in the ink chambers to the outside; and a temperature control unit having a heat exchange passage in at least one of the flow path plate and the nozzle plate in order to control temperature of the ink.

Abstract: An inkjet print head configured to smoothly discharge high viscosity ink includes a nozzle part configured to discharge ink, a supply flow path part configured to define a flow path to supply ink to be discharged from the nozzle part, and a micro pattern part formed at least one portion of the supply flow path part that is configured to reduce of a flow resistance of the ink flowing through the supply flow path part.

Abstract: A liquid ejection head includes: a first and a second common liquid chamber formed in a substrate; a first nozzle array in which short and long nozzles are connected to the first common liquid chamber and alternately arranged on one side of the chamber; a second nozzle array in which short and long nozzles are connected to the first common liquid chamber and alternately arranged on the other side; a third nozzle array in which short and long nozzles are connected to the second common liquid chamber and alternately arranged on one side of the chamber; and a fourth nozzle array in which short and long nozzles are connected to the second common liquid chamber and alternately arranged on the other side; wherein the long and short nozzles formed on the one side and the long and short nozzles formed on the other side are disposed within a pitch P.

Abstract: A liquid dispenser includes a liquid supply channel, a liquid dispensing channel that includes an outlet opening, and a liquid return channel that includes a porous member located therein. 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: A liquid ejection head includes a common liquid chamber for storing liquid, a plurality of flow paths that communicate individually with the common liquid chamber and through which liquid from the common liquid chamber flows, a plurality of ejection orifices that communicate individually with the plurality of flow paths and eject liquid supplied from the common liquid chamber, a plurality of ejection energy generating elements corresponding to the plurality of ejection orifices and generating energy necessary to cause liquid to be ejected from the plurality of ejection orifices, and a movable pressure buffer provided in the common liquid chamber and capable of absorbing a pressure wave generated by driving the plurality of ejection energy generating elements.

Abstract: An ink jet recording apparatus includes a recording head having a common liquid chamber and a plurality of nozzles configured to discharge ink supplied from the common liquid chamber using generation of bubbles, and a recovery unit configured to perform recovery processing on the plurality of nozzles, wherein the recovery unit performs the recovery processing while the recovery unit changes a distribution of flow velocity of the ink flowing from the common liquid chamber to the plurality of nozzles by generating bubbles within apart of the nozzles among the plurality of nozzles.

Abstract: The present invention relates to a fluid ejection assembly that includes an injection-molded mounting substrate that is formed by a two-shot injection molding process, wherein a housing portion of the mounting substrate is formed by a first shot molding, and a die-attach portion of the mounting substrate is formed within the housing portion by a second shot molding.

Abstract: An inkjet printhead having a wafer substrate defining a planar support surface is disclosed. Ink chambers are includes adjacent the planar support surface of the wafer substrate. The ink chambers are defined by sidewalls extending between a nozzle plate and the wafer substrate. One of the sidewalls of each chamber has an opening to allow ink to refill the chamber. An ink conduit is included between the nozzle plate and wafer substrate. The ink conduit is in fluid communication with the openings of the ink chambers. Ink inlets defined in the wafer substrate are also provided, the ink conduits receiving ink to supply to the ink chambers from at least one of the ink inlets. Each of the ink inlets has an ink permeable trap and a vent sized so that the surface tension of an ink meniscus across the vent prevents ink leakage. During use the ink permeable trap directs gas bubbles to the vent where the gas bubbles vent to atmosphere.

Abstract: A base for a liquid discharge head includes a heat element which forms an exothermic portion, an electrode wire that is electrically connected with the heat element, an insulative protective layer provided above the heat generating resistive element and the electrode wire and an upper protective layer provided on the protective layer. The upper protective layer is made from a TaSi alloy containing 22 at. % or more Si.

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: 3.247×1015exp(?0.1717 Dn)?R1?3.278×1015exp(?0.1456 Dn); and 3.247×1015exp(?0.1717 Dn)?R2?3.278×1015exp(?0.1456 Dn).

Abstract: Provided is a liquid discharge head including a discharge port; an energy application chamber that includes a heat generating element, and communicates with the discharge port; and a flow path that supplies the liquid to the energy application chamber, wherein the energy application chamber includes a first energy application chamber communicating with the discharge port, and a second energy application chamber communicating with the first energy application chamber and the flow path, a distance between facing side walls of the second energy application chamber is larger than that of the first energy application chamber in a section perpendicular to a liquid supply direction from the flow path to the energy application chamber, and for side walls of the energy application chambers formed on a back side in the liquid supply direction, the first energy application chamber and the second energy application chamber share the wall.

Abstract: A liquid discharge head includes a heat accumulation layer provided on a board, an energy generation element configured to generate energy to discharge liquid from a discharge port and including a heat generation resistor layer provided on the heat accumulation layer and formed of a material configured to generate heat through supply of electricity and a pair of electrodes connected to the heat generation resistor layer, and an insulation layer including a silicon compound and provided so as to cover the energy generation element, and a line formed of a metal material provided between the heat accumulation layer and the insulation layer, and in at least a portion at a position closer to a flow path than the energy generation element.

Abstract: A pneumatic dispenser (1) according to the present invention includes: a first plate (10) including a liquid supply unit (11), a first chamber (C1) connected to the liquid supply unit (11), and a liquid discharge unit (12) connected to the first chamber (C1), a flexible membrane (20) at least installed on the first chamber (C1) of the first plate (10) and establishing one side of the first chamber (C1), a second plate (30) including a second chamber (C2) at a side opposite to the first chamber (C1) while facing the first plate (10) with the flexible membrane (20) interposed there between and a bump (40) formed by protruding the liquid supply unit (11) toward the flexible membrane (20).

Abstract: A fluid ejector includes a substrate, a MEMS transducing member, a compliant membrane, walls, and a nozzle. First portions of the substrate define an outer boundary of a cavity. Second portions of the substrate define a fluidic feed. A first portion of the MEMS transducing member is anchored to the substrate. A second portion of the MEMS transducing member extends over at least a portion of the cavity and is free to move relative to the cavity. The compliant membrane is positioned in contact with the MEMS transducing member. A first portion of the compliant membrane covers the MEMS transducing member. A second portion of the compliant membrane is anchored to the substrate. Partitioning walls define a chamber that is fluidically connected to the fluidic feed. At least the second portion of the MEMS transducing member is enclosed within the chamber. The nozzle is disposed proximate to the second portion of the MEMS transducing member and distal to the fluidic feed.