Abstract: A method of manufacturing a liquid ejecting head includes forming a first electrode made of platinum, forming a buffer layer made of a compound having a pyrochlore structure that contains bismuth or platinum on the first electrode, forming an oxide layer made of an oxide containing bismuth on the buffer layer, forming a piezoelectric layer made of a compound having a perovskite structure that contains bismuth by burning the oxide layer, and forming a second electrode on the piezoelectric layer.

Abstract: A liquid ejecting head includes a first member including a communication flow path communicating with a pressure chamber, and a second member joined to the first member and including a nozzle communicating with the communication flow path. The communication flow path includes a first flow path section adjacent to the pressure chamber, a second flow path section adjacent to the nozzle and wider than the first flow path section, and an intermediate flow path section including a sloped surface formed between the first flow path section and the second flow path section. An equation “H?W tan(?/4??/2)?0” is satisfied in which H represents a length of the second flow path section, W represents a maximum width of the second flow path, and ? represents an angle between an imaginary plane parallel to the bottom face of the communication flow path and the sloped surface.

Abstract: Techniques for coating print media are described herein. In an example, a photo imaging assembly is to receive a liquid electrophoretic coating composition assembly on a chargeable surface so as to form a coating layer thereon using electrostatic forces. The coating layer is to be transferred to a print medium.

Abstract: In an embodiment, a fluid ejection device includes a substrate with a fluid slot, and a chamber layer over the substrate that defines a firing chamber and a fluidic channel extending through the firing chamber and in fluid communication with the slot at first and second ends. The device includes a tophat layer formed as a two-layer stack over the chamber layer, and a nozzle bore over the firing chamber that comprises a greater cavity formed in a first layer of the stack and a lesser cavity formed in a second layer of the stack, the greater cavity encompasses a larger volume than the lesser cavity.

Abstract: A liquid jet head is provided with: a nozzle plate which includes a nozzle array having a plurality of nozzle holes arranged side by side along a Y direction; an actuator plate which is laminated on the nozzle plate and includes a channel group having a plurality of first channels communicating with the nozzle holes, the first channels being arranged in parallel at intervals along the Y direction; and an inlet ink chamber and an outlet ink chamber both communicating with the first channels on opposite ends in an extending direction of the first channels. A film member which can be warp-deformed along with pressure fluctuation inside the inlet ink chamber and the outlet ink chamber is arranged as a part of inner surfaces of each of the inlet ink chamber and the outlet ink chamber.

Abstract: When protective portions are independently provided for each energy generation element, a leakage current inspection between the protective portions and the energy generation elements cannot be performed at once. Therefore, there is a concern that the inspection in manufacturing a substrate for liquid ejection head requires time. Therefore, the substrate for liquid ejection head is manufactured by performing a leakage current inspection between a connecting portion that is electrically connected to plurality of protective portions and a terminal to which the plurality of energy generation elements are connected, and thereafter removing the connecting portion.

Abstract: A liquid ejecting apparatus includes a pressure chamber that communicates with a nozzle which has an opening at a nozzle formation surface; a communication plate where a common liquid chamber which supplies a liquid to the pressure chamber is formed; a liquid ejecting head having a flexible film which seals the opening surface at the nozzle formation surface side of the common liquid chamber in the communication plate; and a sealing member which has a cavity-shaped sealing hollow section and can be sealed by the nozzle formation surface being confronted in the sealing hollow section. The sealing member is configured so as to be sealable by at least a portion of the flexible film being confronted in the sealing hollow section in a sealed state of the nozzle formation surface.

Abstract: A first device is provided. The first device includes a print head, and a first gas source hermetically sealed to the print head. The print head further includes a first layer further comprising a plurality of apertures, each aperture having a smallest dimension of 0.5 to 500 microns. A second layer is bonded to the first layer. The second layer includes a first via in fluid communication with the first gas source and at least one of the apertures. The second layer is made of an insulating material.

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

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

Abstract: A fluid ejection device includes a firing chamber having an ejection orifice opposite a chamber floor, a heating element and a mesa projecting from the chamber floor, the mesa is spaced from the heating element to define a passive zone between the mesa and heating element.

Abstract: A liquid-ejecting head includes a channel which is in communication with a nozzle opening and which includes a pressure-generating chamber, a circulation channel that serves to circulate a liquid in the channel, and a pressure generator that serves to generate pressure change. The circulation channel has a narrow portion including a first wall and a second wall, the first wall tilting with respect to a forward direction of a liquid flows and serving to gradually decrease the cross-sectional area, the second wall tilting with respect to the flow direction and serving to gradually increase the cross-sectional area. The tilt angle of the first wall with respect to the inner surface of the circulation channel is larger than the tilt angle of the second wall with respect to the inner surface of the circulation channel at the downstream side.

Abstract: An ink jet head is provided which includes: nozzles forming a predetermined array; liquid chambers respectively provided for the nozzles; pressure generation elements respectively provided for the liquid chambers which respectively discharge liquid in the liquid chambers; individual supply flow paths which respectively supply the liquid to the liquid chambers; a common supply flow path that is connected to each individual supply flow path and supplies the liquid into each individual supply flow path; and a liquid supply unit that circulates the liquid of the common supply flow path so as to make the liquid flow in one direction in the common supply flow path. The common supply flow path has a shape in which a cross-sectional area is increased and decreased at a predetermined interval. Each individual supply flow path is provided at a position where the cross-sectional area of the common supply flow path is increased.

Abstract: A head unit includes a head, an upstream member with an upstream passage supplied with liquid, a downstream member with a downstream passage communicating with the upstream passage and supplying liquid to the head, an elastic sealer connecting the upstream and downstream passages, and including a tube with a connection passage, and a support between the sealer and the downstream member. In the head unit, the upstream member and the sealer apply pressure in a penetration direction of the connection passage and hermetically seal the upstream passage, the sealer and the downstream member apply pressure in a direction perpendicular to the penetration direction of the tube and hermetically seal the downstream passage, and the support abuts a region on a surface of the sealer, the surface being opposite the upstream member, the region overlapping a region to which the sealer and the upstream member apply pressure.

Abstract: A thin film forming apparatus which automatically forms, on an electrode layer formed on a substrate, a functional thin film which is crystallized from a precursor layer is disclosed, including a water-repellant film forming unit which forms, on a region other than a region on which is to be formed the functional thin film on the electrode layer, a water-repellant film which includes a self-assembled monolayer; an inkjet coating unit which coats, on the region on which is to be formed the functional thin film on the electrode layer, the precursor layer by an inkjet method; and a controller which controls, to within a predetermined time, a time from forming the water-repellant film with the water-repellant film forming unit to coating the precursor layer with the inkjet coating unit.

Abstract: A liquid-jet head includes a channel plate forming an individual liquid chamber in communication with nozzles configured to eject liquid drops, a wall surface member forming a wall surface of the individual liquid chamber, and a drive unit disposed on the wall surface member side and configured to generate a pressure applied to a drive region inside the individual liquid chamber. In the liquid-jet head, a fluid resistance part is formed by disposing an island part in a liquid supply channel configured to supply a liquid to the individual liquid channel, and the island part includes a gradient part on the channel plate side, at least a part of the gradient part being formed such that the part of the gradient part faces the drive region inside the individual liquid chamber.

Abstract: A method of forming an electrical component is provided. The method comprises preparing a subassembly by electrically connecting an integrated circuit to a flexible circuit; and attaching the subassembly to a multilayer ceramic capacitor having a mounting surface with a curvature deviation exceeding 0.008 inches per inch.

Abstract: An apparatus and method for use in printing a swath in a multipass printing device are disclosed. The method comprises selectively depositing a drop of ink associated with a pixel to be printed on a print media based on a substantially uniform print mask function during a first pass of a print head, and selectively depositing a further drop of ink associated with the pixel on the print media based on a ramp print mask function during a further pass of the print head.

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 microfluidic electronic device is disclosed. This microfluidic electronic device may include a separate actuator mechanism from a microfluidic cartridge. The microfluidic cartridge may include a fluid reservoir coupled to a nozzle by a channel, where the fluid reservoir holds a fluid with a solvent and a material in solution, and the microfluidic cartridge may be remateably coupled to the microfluidic electronic device. During operation of the microfluidic electronic device, the microfluidic cartridge supplies fluid to the nozzle via the channel, and the actuator mechanism drives droplets from the nozzle without contact between the actuator mechanism and the fluid. Furthermore, the droplets may be driven from the nozzle onto a substrate without contact between the substrate and the nozzle, and a positioning mechanism in the microfluidic electronic device may accurately position the nozzle relative to the substrate.

Abstract: A method for forming an ink jet printhead comprises processing an epoxy adhesive such that negative effects from physical contact with particular inks are reduced or eliminated. Conventional adhesives processed using conventional techniques are known to gain weight and squeeze out when exposed to certain inks such as ultraviolet inks and pigmented inks. An embodiment of the present teachings can include processing of a particular adhesive such that the resulting epoxy adhesive is suitable for printhead applications.

Abstract: A device substrate includes a substrate body having an energy generating device provided thereon, where the energy generating device generates energy for ejecting liquid, an ejection port forming member disposed on the substrate body, where the ejection port forming member has a pressure chamber that surrounds the energy generating device and an ejection port that communicates with the pressure chamber, and a supply port configured to supply the liquid to the pressure chamber. The ejection port forming member has a first surface that is in contact with the substrate body and a second surface other than the first surface, and the supply port is formed in the second surface.

Abstract: An ink jet printhead device includes a substrate and at least one first dielectric layer above the substrate. A resistive layer is above the at least one first dielectric layer. An electrode layer is above the resistive layer and defines first and second electrodes coupled to the resistive layer. At least one second dielectric layer is above the electrode layer and contacts the resistive layer through the at least one opening. The at least one second dielectric layer has a compressive stress magnitude of at least 340 MPa.

Abstract: There is provided a liquid droplet jetting apparatus, including: a liquid droplet jetting head configured to include a liquid droplet jetting surface formed with a plurality of nozzles from which liquid droplets are jetted, an energy applying mechanism configured to apply a jetting energy to a liquid in each of the nozzles, and a driving device configured to drive the energy applying mechanism; a relative movement mechanism configured to relatively move, along the liquid droplet jetting surface, the liquid droplet jetting head and an object to be jetted; and a heat radiating member configured to be provided in the liquid droplet jetting head to radiate heat generated in the driving device. The heat radiating member includes a heat radiating surface which is positioned on a plane including the liquid droplet jetting surface or which projects toward the object as compared with the plane including the liquid droplet jetting surface.

Abstract: A water-based ink for inkjet recording is provided with color material, binder resin, surfactant, and water-based solvent, wherein when the ink is heated, 1) a viscosity of the ink is more than 10 mPa·s and 30 mPa·s or less, the viscosity being measured over the ink weight change rate range of 0% to 10%; 2) a viscosity of the ink is 200 mPa·s at any one of the ink weight change rate within 35% or more and 55% or less, the viscosity being measured by the E-type viscometer at 25° C. and 1 rpm; and 3) a surface tension at 25° C. of the ink at the ink weight change rate of 5% is lower than a surface tension at 25° C. of the ink at the ink weight change rate of 0%.

Abstract: A liquid ejecting head includes a pressure generation chamber which fluidly communicates with a nozzle opening through which liquid is discharged, a pressure generation unit which causes pressure change on liquid in the pressure generation chamber, a manifold which serves as a liquid chamber common to a plurality of the pressure generation chambers, a flexible film which is configured to cover the manifold so as to absorb a pressure change generated in the manifold, and a heat generation unit which is formed on the flexible film at a region opposed to the manifold and is made of a pattered metal.

Abstract: A method of ejecting a drop of fluid includes providing a fluid ejector. The fluid ejector includes a substrate, a MEMS transducing member, a compliant membrane, walls, and a nozzle. The substrate includes a cavity and 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 being anchored to the substrate. 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. A quantity of fluid is supplied to the chamber through the fluidic feed.

Abstract: A liquid dispenser array structure includes a substrate including a plurality of liquid dispensers. The plurality of liquid dispensers includes a liquid supply channel, a liquid dispensing channel including an outlet opening, and a liquid return channel including a vent located downstream relative to the location of the outlet opening of the liquid dispensing channel. A selectively actuatable first heater heats a portion of the liquid flowing through the liquid supply channel. A selectively actuatable second heater diverts the portion of the liquid previously heated by the first heater toward the outlet opening of the liquid dispensing channel. A liquid supply provides liquid under pressure to the plurality of liquid dispensers.

Abstract: A liquid dispenser includes a first liquid chamber including a nozzle and a second liquid chamber. A flexible membrane is positioned to separate and fluidically seal the first liquid chamber and the second liquid chamber. A heater is associated with the second liquid chamber. A liquid supply channel is in fluid communication with the second chamber. A liquid return channel is in fluid communication with the second chamber. A liquid supply provides a liquid that flows continuously from the liquid supply through the liquid supply channel through the second liquid chamber through the liquid return channel and back to the liquid supply. A fluidic impedance structure is positioned in the second liquid chamber between the heater and the liquid return channel.

Abstract: An inkjet printhead includes an oleophobic membrane arranged at a location that allows the oleophobic membrane to simultaneously vent air from an ink flow channel of the printhead and to retain ink within the ink flow channel. The oleophobic membrane includes a metal structure having a nanostructured surface and low-surface energy coating disposed on the metal structure.

Abstract: Aqueous ink jet ink compositions can be used for ink jet printing colored or invisible images on receiver elements. These compositions contain a polymeric agent comprising core-shell polymeric particles. The core of the particles comprises a hydrophobic polymer having an acid number less than 10. The shell of the particles comprises a hydrophilic polymer having an acid number of at least 70. The weight ratio of the core to the shell is at least 50:50 and up to and including 90:10. Such compositions can be used in various ink jet printing systems including drop on demand and continuous ink jet printing systems.

Abstract: A unit head has a head main body having a nozzle surface, and a substrate case having a fastening surface fastened to a fixation frame of a frame and accommodating a relay substrate. The fastening surface of a substrate case is formed at a position closer to a surface of an opposite side to a fixation frame than a side surface of a fastening surface side of the head main body, and the head main body is positioned further at an ink ejecting side than the fixation frame with the faster surface being fixed to the fixation frame, the other end of a first cable whose one end is connected to the electrode terminal of a piezoelectric element is connected to the relay substrate, a second cable connected to the relay substrate is drawn to an opposite side to a nozzle surface from a position close to a surface of an opposite side to the fastening surface, and the other end of the second cable is connected to a drive substrate.

Abstract: A liquid-jet head includes: a passage member including a plurality of individual passages and a manifold communicating commonly with the individual passages, the individual passages each having a pressure generating chamber communicating with a nozzle orifice that ejects liquid, the pressure generating chambers being formed on one surface side of the passage member on an opposite side from the nozzle orifices, the individual passages and the manifold communicating with each other through communicating paths, and each adjacent two of the individual passages communicating with each other through the corresponding communicating path; and reinforcement walls each provided between the communicating paths in a parallel direction of the individual passages, the reinforcement walls defining the communicating paths.

Abstract: The invention provides a process for producing a liquid ejection head, including the steps providing an element substrate provided with an element for generating energy to be utilized for ejecting a liquid, a wiring substrate electrically connected to the element substrate through a lead wire, and a support member provided with a first support portion and a second support portion; applying a sealant to the second support portion; placing the element substrate on the first support portion and bringing the lead wire into contact with the sealant applied to the second support portion; and curing the sealant.

Abstract: A liquid discharge head includes a plurality of discharge ports configured to discharge liquid, a supply port configured to retain the liquid to be discharged from the plurality of discharge ports, a first pressure chamber including a first energy generation element to discharge a predetermined amount of liquid droplets, a second pressure chamber including a second energy generation element to discharge an amount of liquid droplets greater than the predetermined amount, a first flow path through which the supply port and the first pressure chamber communicate with each other, and a second flow path through which the first pressure chamber and the second pressure chamber communicate with each other.

Abstract: An ink manifold for an inkjet printhead is provided, comprising a number of substantially parallel transverse channels 709,713 connected by one or more connecting passages 719. The resistance to flow provided by the connecting passages is substantially greater than the resistance to flow along the length of a transverse channel. The ink manifold provided by the present invention ensures that the ink pressure and flow rate presented to the ejectors of the printhead is uniform along the entire length of the ejector array and, moreover, does so in a shallower manifold design than has previously been known.

Abstract: A liquid discharge head includes an element substrate including an energy generating element; a supporting member adhesively supporting the element substrate; a sheet member adhesively bonded to the supporting member to adjoin the inner surface of an opening accommodating the element substrate in the sheet member and an end section of the element substrate; a wiring substrate bonded to the sheet member to adjoin the inner surface of an opening accommodating the element substrate in the wiring substrate and the end section of the element substrate and including a wire electrically connected to the energy generating element; and a sealant sealing a part electrical connecting the wiring substrate and element substrate, wherein the height of a wiring substrate surface opposite to that contacting the sheet member from supporting member is smaller than the element substrate surface opposite to that contacting the supporting member from the supporting member.

Abstract: A liquid jet head is provided with: a nozzle plate which includes a nozzle array having a plurality of nozzle holes arranged side by side along a Y direction; an actuator plate which is laminated on the nozzle plate and includes a channel group having a plurality of first channels communicating with the nozzle holes, the first channels being arranged in parallel at intervals along the Y direction; and an inlet ink chamber and an outlet ink chamber both communicating with the first channels on opposite ends in an extending direction of the first channels. A film member which can be warp-deformed along with pressure fluctuation inside the inlet ink chamber and the outlet ink chamber is arranged as a part of inner surfaces of each of the inlet ink chamber and the outlet ink chamber.

Abstract: An ejection liquid capable of being stably ejected based on a system using thermal energy even if the liquid contains at least one selected from the group consisting of proteins and peptides, and a method and an apparatus for ejecting the liquid containing at least one selected from the group consisting of proteins and peptides using this system are provided. The applicability of the liquid for use in an inkjet system using thermal energy is improved by adding at least one selected from the group consisting of amino acids and salts thereof and a surfactant to an aqueous solution containing at least one selected from the group consisting of proteins and peptides.

Abstract: A liquid ejection head includes a recording element substrate including an ejection port that ejects liquid, and an energy generating element that generates energy used to eject liquid, an electric wiring substrate including wiring for transmitting electric power for driving the energy generating element, and an opening that exposes the recording element substrate, a plurality of connecting portions that electrically connect the recording element substrate and the electric wiring substrate, a recess formed between the recording element substrate and the electric wiring substrate, and at least one groove formed in the bottom of the recess corresponding to at least one part where the connecting portions are formed. The at least one groove includes a first portion formed along an arranging direction of the plurality of connecting portions, and a second portion formed in a direction intersecting with the arranging direction.

Abstract: A valve jet printer includes a solenoid coil and a plunger rod having a magnetically susceptible shank. A first end of the shank and at least a portion of the shank are received within a bore of the solenoid coil. The printer also includes a nozzle including an orifice extending therethrough and a spring biasing a second end of the shank toward the nozzle. The second end of the plunger rod includes a tip formed of perfluoroelastomer (FFKM). The second end of the shank includes a cup-shaped cavity having a convex bottom and a circular side. The tip includes a concave base and an annular flange. In an assembled state, the concave base of the tip contacts the convex bottom of the cup-shaped cavity, and the end of the circular side opposite the convex bottom is rolled over the annular flange thereby securing the tip in the cup-shaped cavity.

Abstract: Provided is a liquid ejection head formed by performing bonding and fixing operations speedily and highly accurately when a recording element board is bonded to a supporting member, the liquid ejection head having a high liquid-landing accuracy and achieving a high printing quality. A method of manufacturing the liquid ejection head is also provided. Heat is conducted from a holding member, which supports the recording element board, to a thermosetting adhesive via the supporting member, which supports the recording element board, in order to accelerate the curing of the adhesive.

Abstract: A method and apparatus supply electrical current to a firing actuator of a printhead die across a high side switching transistor in a source follower arrangement and supply a regulated voltage, that is no greater than a concurrent voltage at a drain of the HSS transistor, to a gate of the high side switching transistor.

Abstract: An apparatus and method for use in printing a swath in a multipass printing device are disclosed. The method comprises selectively depositing a drop of ink associated with a pixel to be printed on a print media based on a substantially uniform print mask function during a first pass of a print head, and selectively depositing a further drop of ink associated with the pixel on the print media based on a ramp print mask function during a further pass of the print head.

Abstract: A liquid ejecting apparatus includes: a liquid ejecting head having a pressure generation chamber in which a liquid is charged, a pressure generation unit which generates pressure change in the liquid inside the pressure generation chamber with supply of a driving signal, and a nozzle opening which ejects the liquid inside the pressure generation chamber according to the pressure change; and a control unit which has an expansion element expanding the pressure generation chamber and a contraction element contracting the pressure generation chamber, and supplies a micro-vibration driving signal to a piezoelectric element so as to generate the micro-vibration of the liquid to the inside of the pressure generation chamber without ejecting the liquid from the nozzle opening, wherein the micro-vibration driving signal is formed so that the inclination of the expansion element is greater than the inclination of the contraction element.

Abstract: A droplet ejecting device includes an ejection head, a moving body, a guide part, an attachment part, a fixed part and a liquid reservoir. The ejection head is configured and arranged to eject liquid droplets onto a substrate. The moving body supports the ejection head, and is configured and arranged to move integrally with the ejection head with respect to the substrate. The guide part is configured and arranged to guide a relative movement of the moving body. The attachment part is attached to the guide part and supporting the moving body, and configured and arranged to move integrally with the moving body. The fixed part is fixed to the attachment part separately from the moving body. The liquid reservoir is provided to the fixed part, and configured and arranged to store the liquid supplied to the ejection head.

Abstract: A method of dispensing liquid includes providing a carrier liquid under pressure using a first liquid supply that flows from the first liquid supply through a first liquid supply channel through a liquid dispensing channel through a liquid return channel and back to the first liquid supply continuously during a drop dispensing operation. A functional liquid is provided to the liquid dispensing channel through a second liquid supply channel using a second liquid supply. A drop formation device is selectively actuated to form a discrete drop of the functional liquid in the carrier liquid flowing through the liquid dispensing channel. The functional liquid is immiscible in the carrier liquid. The drop ejection device is selectively actuated to divert the discrete drop of the functional liquid and a portion of the carrier liquid flowing through the liquid dispensing channel toward an outlet opening of the liquid dispensing channel.

Abstract: A fluid ejection device includes a firing chamber having a chamber floor with an orifice opposite the chamber floor and a heating element partially covering the chamber floor, a region of the chamber floor being contoured to define a cavity extending into the chamber floor.