Abstract: A composite photoresist material and method of making the composite photoresist material. The composite photoresist material includes: a photoresist layer devoid of a phenoxy resin, and a photoresist layer containing a phenoxy resin.

Abstract: A liquid ejecting head includes: head chips including a first-head-chip and a second-head-chip; a holder holding the head chips; and a heater along a direction parallel to a nozzle surface. The first-head-chip and the second-head-chip are disposed to be offset from each other in both a first-direction and a second-direction parallel to the nozzle surface and intersecting with each other. When a first-side is one of the four sides of a virtual rectangle circumscribing the aggregate of the head chips and a second-side and a third-side are coupled to both ends of the first-side, the first-head-chip is in contact with the first-side and the third-side and the second-head chip is in contact with the second-side. The heater overlaps the head chips. A first-region surrounded by the first-side, the second-side, the first-head-chip, and the second-head-chip includes a first-outside-part positioned outside the outer edge of the heater.

Abstract: A liquid discharging apparatus, having a head, a reservoir section including a liquid reservoir chamber and an atmosphere communication path, a liquid flow path connecting the head with the liquid reservoir chamber, a switching assembly to switch states of the atmosphere communication path between a connecting state and a disconnecting state, and a controller, is provided. The controller is configured to control the switching assembly to switch the states of the atmosphere communication path from the connecting state to the disconnecting state; after switching the states of the atmosphere communication path, control the head to discharge the liquid; and after switching the states of the atmosphere communication path, and in response to a predetermined connection condition being satisfied, control the switching assembly to switch the states of the atmosphere communication path from the disconnecting state to the connecting state.

Abstract: A transducer includes a base, beams, and a coupler. The beams each include a piezoelectric layer, a first electrode layer, and a second electrode layer. The coupler is fitted in slits between adjacent beams to define a connection between the beams. The coupler extends from an upper portion of the base into each of the slits without a break. A Young's modulus of the material of the coupler is lower than a Young's modulus of the material of the piezoelectric layer. A maximum thickness of the coupler in the upper portion of the base in the direction of the central axis of the base is greater than a thickness of each of the beams.

Abstract: A liquid discharging apparatus has: a head unit that discharges a liquid; and a control unit that controls the operation of the head unit. The head unit has: a driving circuit board that includes a driving signal output circuit that outputs a driving signal, and also includes a substrate on which the driving signal output circuit is mounted; a discharge head that includes a driving element driven by the driving signal, a switching circuit that selectively supplies the driving signal to the driving element, and a nozzle plate in which a nozzle is formed, the nozzle discharging the liquid by being driven by the driving element; a first flow path member through which the liquid to be discharged from the nozzle passes; and a first heat dissipating member coupled to the driving circuit board. The first heat dissipating member is coupled to the first flow path member.

Abstract: In various examples, a fluid ejection device may include a fluid ejection die formed with a first material and that includes a bondpad and a plurality of fluid ejectors, and a cover layer adjacent the fluid ejection die. The cover may be formed with a second material that is different than the first material and may include a first region that overlays the bondpad and a second region that overlays the plurality of fluid ejectors. In various examples, the first and second regions are separated by a break in the cover layer. The break may be filled with a third material that is different than one or both of the first and second material.

Abstract: In various examples, a fluid ejection device may include a substrate with a fluid feed hole and a corrosion-detecting conductive path or sensor disposed behind a wall of the fluid feed hold. The corrosion-detecting conductive path or sensor may close a circuit in response being exposed to a fluid contained within the fluid feed hole.

Abstract: An ink jet composition according to the present disclosure contains a flameproofing agent and resin particles. The resin particles are preferably urethanic resin particles. It is preferable that a urethanic resin making up the urethanic resin particles is a urethanic resin containing a crosslinking group and the crosslinking group is one or more selected from the group consisting of a blocked isocyanate group and a silanol group. The urethanic resin making up the urethanic resin particles preferably has a polycarbonate skeleton.

Abstract: According to an example, a fluid ejection device may include a membrane including a first column of firing chambers, a second column of firing chambers, and a portioning wall, in which the portioning wall physically separates the first column of firing chambers from the second column of firing chambers. The fluid ejection device may also include a plurality of actuators and a substrate including a respective hole extending through the substrate from each of the firing chambers, in which an actuator of the plurality of actuators is provided in each of the firing chambers.

Abstract: A substrate includes a first substrate which has a first substrate through hole, and a second substrate which has a second substrate through hole and directly or indirectly overlaps the first substrate, the first substrate through hole and the second substrate through hole directly or indirectly communicate with each other to form a liquid supply path and a width D1 of an opening portion of the first substrate through hole on a surface of the first substrate closer to the second substrate, a width D2 of an opening portion of the second substrate through hole on a surface of the second substrate closer to the first substrate, a width D3 of an opening portion of the second substrate through hole on a surface of the second substrate farther from the first substrate have a relationship of D1<D2 and D3<D2.

Abstract: An ink-jet recording apparatus may include an ink-jet head having: individual connection flow channels through which ink can be discharged from pressure chambers; and a common flow channel at which ink from the individual connection flow channels merges, wherein when the ink is ejected, in a nozzle through which the maximum amount of ink per unit time is ejected, the relationship of (Fn/Fi)?10 is satisfied, Fn representing the amount of ink ejected per unit time from the nozzle, and Fi representing the average flow rate of ink discharged per unit time from the individual connection flow channels, and the relationship of (Rc/Rt)?10 is satisfied, Rc representing the flow channel resistance of the common flow channel, and Rt representing the synthetic resistance of the individual connection flow channels.

Abstract: A liquid ejection head includes a flow channel structure, a supply channel structure, a piezoelectric element, a sealing substrate, and a heater. The flow channel structure defines an ejection channel including an individual channel and a manifold. The individual channel has a nozzle and a pressure chamber in which pressure is applied to liquid for causing the liquid to be ejected from the nozzle. The supply channel structure defines a supply channel configured to allow the liquid to flow therethrough to the ejection channel. The piezoelectric element is positioned on an upper surface of the flow channel structure and facing the pressure chamber via a vibration plate. The sealing substrate is made of a material having a higher thermal conductivity than the supply channel structure. The sealing substrate surrounds the piezoelectric element on the flow channel structure to seal the piezoelectric element. The heater is disposed at the sealing substrate.

Abstract: A liquid ejection head includes an ejection orifice forming member having a liquid ejection orifice and a substrate having a liquid flow path such that a liquid circulation flow path is formed between the ejection orifice forming member and the substrate. The liquid circulation flow path includes a bubble generation chamber facing the liquid ejection orifice and is branched from the liquid flow path so as to pass through the bubble generation chamber and join the liquid flow path. The substrate has an ejection energy generation element arranged to face the bubble generation chamber and a circulation energy generation element arranged at a different position to face the liquid circulation flow path. The gap between the ejection energy generation element and the ejection orifice forming member is different from the gap between the circulation energy generation element and the ejection orifice forming member.

Abstract: An ink jet head includes a piezoelectric element that is driven in a d33 mode, a pressure generation chamber in which a pressure is generated by the piezoelectric element, and an individual ink supply flow passage that through which the ink is supplied to the pressure generation chamber. The ink jet head includes an individual ink discharge flow passage that through which the ink is discharged from the pressure generation chamber, and a nozzle that ejects the ink from the pressure generation chamber. In a cross-sectional view in a direction orthogonal to an arrangement direction of the nozzle, inner diameters of the pressure generation chamber, the individual ink supply flow passage, and the individual ink discharge flow passage are shorter on a part close to the nozzle than a part close to the piezoelectric element side. Accordingly, an ink jet head capable of ejecting high-viscosity ink can be provided.

Abstract: A method for regulating a deposition characteristic of a rendering material in a rendering apparatus includes determining a status of material deposition structure, and adjusting a physical attribute of the material deposition structure.

Abstract: A bonding member includes a first member, and a second member bonded to the first member with an adhesive in a bonding direction. The first member includes a bonding surface to be bonded to the second member in the bonding direction, and a surface portion lower than the bonding surface in the bonding direction. The surface portion of the first member is bonded to the second member with the adhesive in the bonding direction, and the second member includes a through hole opposed to the surface portion of the first member.

Abstract: A liquid discharge head includes a nozzle from which a liquid is discharged, a pressure chamber communicating with the nozzle, to which the liquid is supplied, a dummy channel not communicating with the nozzle and adjacent to the pressure chamber, the dummy channel being a sealed place to which the liquid is not supplied, and a diaphragm configured to define a displaceable wall of the pressure chamber and a wall of the dummy channel. The wall of the dummy channel defined by the diaphragm includes a through hole.

Abstract: A liquid ejection head includes a pressure chamber that allows a first liquid and a second liquid to flow inside, a pressure generation element that applies pressure to the first liquid and an ejection port that ejects the second liquid. In a state where the first liquid flows in a direction, crossing a direction of ejection of the second liquid from the ejection port, while being in contact with the pressure generation element and the second liquid flows in the crossing direction along the first liquid in the pressure chamber, the second liquid is ejected from the ejection port by causing the pressure generation element to apply a pressure to the first liquid.

Abstract: A liquid ejection head includes a substrate provided with an energy-generating element, an ejection orifice forming member that is formed on the substrate and includes an ejection orifice from which liquid is ejected, a reinforcing rib provided in the ejection orifice forming member, and a recess that is formed in the substrate and forms a part of a flow path of liquid, wherein the reinforcing rib is disposed in the inside of the recess.

Abstract: In a layer including print elements and a layer below the layer including the print elements in a lamination direction of a print element substrate, the print elements and drive circuits are arranged point-symmetrically about the center of the substrate viewed from a side where discharge ports that allow the liquid to be discharged are open, and in an upper layer over the layer including the print elements in the lamination direction, functional elements are arranged in a direction of liquid flow in which the liquid flows from supply ports to collection ports while passing above the print elements.

Abstract: A liquid ejecting head has a supply opening toward which a liquid is supplied, a collection opening through which the supplied liquid is collected, a nozzle that ejects the liquid supplied from the supply opening, and a filter disposed at an intermediate point in a flow path that couples the supply opening and the nozzle together. The liquid ejecting head further has a plurality of outlets leading from an upstream chamber disposed upstream of the filter to the collection opening.

Abstract: A liquid-discharging-head substrate includes an insulation layer, an electrode, and a heating resistor element, wherein the insulation layer includes a first opening portion including a first opening formed in a surface of the insulation layer, a second opening having a smaller opening area than an opening area of the first opening, and a surface connecting the first opening and the second opening, and a second opening portion extending from the second opening to a back surface of the insulation layer, wherein the electrode is formed in the second opening portion, and a surface of the electrode is exposed from the second opening when viewed from the surface side of the insulation layer, and wherein the heating resistor element is in contact with the surface connecting the first opening and the second opening, and with the surface of the electrode.

Abstract: In a liquid ejection head, ejection orifices can be densely arranged while suppressing decrease in liquid flow speed. A channel extending through a pressure chamber extends in a direction crossing an ejection orifice array such that a liquid flows between the two ends of the channel located on the sides of the ejection orifice array.

Abstract: According to the invention, there is provided a recording method which includes adhering an ink composition to a recording medium, and adhering a reaction liquid to the recording medium, the reaction liquid containing water and a reagent for aggregating or thickening components of the ink composition, and having a pH of 7 to 10. In the adhering of the reaction liquid, an epoxy-based adhesive is used for at least a portion of a reaction liquid passage for supplying the reaction liquid to an ink jet head, and a member in contact with the reaction liquid in the ink jet head, and the reaction liquid is discharged from the ink jet head so as to adhere to the recording medium.

Abstract: An ink jet recording method of the present invention includes: forming an ink image by ejecting an ink onto a transfer body with an ink jet head in which a recording element substrate provided with an element generating energy to be used for ejecting the ink, a pressure chamber including the element inside, and an ejection orifice ejecting the ink is provided, and the ink in the pressure chamber is circulated between the pressure chamber and the outside of the pressure chamber; and transferring the ink image onto a recording medium by bringing the recording medium into contact with the transfer body on which the ink image is formed, wherein a viscosity of the ink is 2 mPa·s or more to 20 mPa·s or less.

Abstract: A liquid ejection head includes a pressure chamber that allows a first liquid and a second liquid to flow inside, a pressure generation element that applies pressure to the first liquid and an ejection port that ejects the second liquid. The first liquid and the second liquid that flows on a side closer to the ejection port than the first liquid flow in contact with each other in the pressure chamber. The first liquid and the second liquid flowing in the pressure chamber satisfy 0.0<0.44(Q2/Q1)?0.322(?2/?1)?0.109<1.0, where ?1 is a viscosity of the first liquid, ?2 is a viscosity of the second liquid, Q1 is a flow rate of the first liquid, and Q2 is a flow rate of the second liquid.

Abstract: A liquid ejecting apparatus includes a liquid ejecting unit including at least one pressure chamber filled with a reactive ink, at least one nozzle communicating with the pressure chamber, a supply channel through which the reactive ink is supplied to the pressure chamber, and an elastic compliance film forming a portion of the supply channel; a piezoelectric element that changes a capacity of the pressure chamber when an electric signal is supplied to the piezoelectric element; and a flexible wiring substrate at which a signal wire for supplying the electric signal to a connection terminal of the piezoelectric element is formed. The elastic compliance film is formed of a para-aramid resin. The connection terminal and the signal wire are electrically connected to each other by solder.

Abstract: A method of making inkjet print heads may include forming recesses in a first surface of a first wafer to define inkjet chambers. The method may also include forming openings extending from a second surface of the first wafer through to respective ones of the inkjet chambers to define inkjet orifices. The method may further include forming a second wafer including ink heaters, and joining the first and second wafers together so that the ink heaters are aligned within respective inkjet chambers to thereby define the inkjet print heads.

Abstract: A liquid ejecting head includes an element substrate including a common liquid chamber connected to a liquid supply source, a pressure chamber connected to the common liquid chamber and including inside an element to generate energy used for ejecting liquid, a bubble generating chamber connected to the common liquid chamber and including inside a pump to cause a flow of the liquid, and a connection flow path connecting the pressure chamber and the bubble generating chamber. The liquid ejecting head includes a first anti-cavitation film over the element to generate the energy and a second anti-cavitation film over the pump, and the first anti-cavitation film and the second anti-cavitation film have different film thicknesses.

Abstract: A fluid ejection device includes a fluid slot, a fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the fluid ejection chamber, a fluid circulation channel communicated at a first end with the fluid slot and communicated at a second end with the fluid ejection chamber, and a particle tolerant architecture within the fluid circulation channel at the second end.

Abstract: In one embodiment, an apparatus includes a module having: an array of transducers formed in thin film structure on a substrate, the array being positioned along a tape bearing surface of the module, and a heating element positioned in the thin film structure and recessed from the tape bearing surface. An apparatus, according to another embodiment, includes a module having an array of transducers formed on a substrate, the array being positioned along a tape bearing surface of the module between skiving edges thereof. A slot is formed in the substrate adjacent one of the skiving edges. A heating element is positioned in the slot.

Abstract: An ink-jet recording apparatus may include an ink-jet head having: individual connection flow channels through which ink can be discharged from pressure chambers; and a common flow channel at which ink from the individual connection flow channels merges, wherein when the ink is ejected, in a nozzle through which the maximum amount of ink per unit time is ejected, the relationship of (Fn/Fi)?10 is satisfied, Fn representing the amount of ink ejected per unit time from the nozzle, and Fi representing the average flow rate of ink discharged per unit time from the individual connection flow channels, and the relationship of (Rc/Rt)?10 is satisfied, Rc representing the flow channel resistance of the common flow channel, and Rt representing the synthetic resistance of the individual connection flow channels.

Abstract: A fluid ejection device includes a fluid slot, a first fluid ejection chamber communicated with the fluid slot and including a first drop ejecting element, a second fluid ejection chamber including a second drop ejecting element, and a fluid circulation path including a first portion communicated with the fluid slot and the second fluid ejection chamber, and a second portion communicated with the first fluid ejection chamber and the second fluid ejection chamber, with the fluid circulation path including a fluid circulating element within the first portion.

Abstract: Provided is a liquid ejection head comprising: an ejection opening row along a first direction; a pressure chamber with print-element; a passage communicating with the pressure chamber; a supply opening row along the first direction with supply openings extending in a second direction to supply liquid to the passage; a collection opening row along the first direction with collection openings extending in the second direction to collect a liquid from the passage; a first common supply passage along the first direction to supply a liquid to the supply opening row; a first common collection passage along the first direction to collect a liquid from the collection opening row; a first supply side communication opening extending in the second direction to supply a liquid to the first common supply passage; and a first collection side communication opening extending in the second direction to collect a liquid from the first common collection passage, wherein at least one of the first supply side communication openi

Abstract: An example fluidic micro electromechanical system may include a substrate and a first layer supported by the substrate. The first layer forms sides of a chamber, a passage through one of the sides and a chamber and a check valve leaf. The check valve leaf is pivotable about an axis nonparallel to the substrate to open and close the passage. The system may further include a second layer over the chamber, an opening into the chamber and a resistor supported within the chamber.

Abstract: An electromechanical transducer element including a lower electrode, an electromechanical transducer film and an upper electrode formed on the electromechanical transducer film.

Abstract: The present disclosure relates to aerosol delivery devices. The aerosol delivery devices include mechanisms configured to deliver an aerosol precursor composition from a reservoir to an atomizer including a vaporization heating element to produce a vapor. For example, a bubble jet head may be configured to dispense the aerosol precursor composition to the atomizer. The bubble jet head may be fixedly coupled to the atomizer. The bubble jet head may include a precursor inlet, an ejection heating element, and a precursor nozzle. The atomizer may include a vaporization heating element.

Abstract: A process for manufacturing an integrated circuit (IC) with a through via extending through a group III-V layer to a diode is provided. An etch is performed through the group III-V layer, into a semiconductor substrate underlying the group III-V layer, to form a via opening. A doped region is formed in the semiconductor substrate, through the via opening. Further, the doped region is formed with an opposite doping type as a surrounding region of the semiconductor substrate. The through via is formed in the via opening and in electrical communication with the doped region.

Abstract: Provided is a liquid ejection head substrate, in which a plurality of units are arranged. Each of the units includes: a pressure generating element formed on a first surface of a support substrate; and a pair of independent liquid chambers, which are formed on both sides of the pressure generating element so as to be opposed to each other, and are opened to the first surface of the support substrate. The liquid ejection head substrate includes, in the support substrate: a first common liquid chamber communicating to a plurality of independent liquid chambers on one side of the pair of independent liquid chambers; a second common liquid chamber communicating to a plurality of independent liquid chambers on another side of the pair of independent liquid chambers; and a partition wall separating the first common liquid chamber and the second common liquid chamber from each other.

Abstract: A liquid discharge head includes a nozzle plate, a channel substrate, a common-liquid-chamber substrate, an adhesive, and a sealant. The nozzle plate includes a plurality of nozzles to discharge liquid. The channel substrate includes a plurality of individual liquid chambers communicated with the plurality of nozzles. The common-liquid-chamber substrate includes a common liquid chamber to supply the liquid to the plurality of individual liquid chambers. The adhesive bonds two of the nozzle plate, the channel substrate, and the common-liquid-chamber substrate. The adhesive faces a channel through which the liquid flows. The sealant surrounds the adhesive at an opposite side of the channel relative to the adhesive.

Abstract: Printheads and methods for forming printheads are described herein. In one example, a printhead includes a number of drop generators, wherein a pitch between each adjacent drop generator is substantially the same, and the drop generators alternate between a high drop weight (HDW) drop generator and a low drop weight (LDW) drop generator. The printhead also includes a flow channel from an ink source leading into an ejection chamber associated with each drop generator, wherein the flow channel comprises an inflow region proximate to the ink source, wherein an area of the inflow region is adjusted to control the flux of ink into the ejection chamber.

Abstract: A method for manufacturing liquid ejection heads includes the steps of forming ejection port members on a substrate, the ejection port members each having a liquid channel and an ejection port for ejecting liquid through the channel, the liquid channel communicating with the substrate; forming supply ports passing through the substrate to supply liquid to the channels; and forming a separation groove in the substrate to separate the substrate for each liquid ejection head. The step of forming the ejection port members includes the step of hardening a material constituting the ejection port member by heat treatment. The step of forming the separation groove is performed before the step of hardening.

Abstract: An ink jet recording method of the present invention includes: forming an ink image by ejecting an ink onto a transfer body with an ink jet head in which a recording element substrate provided with an element generating energy to be used for ejecting the ink, a pressure chamber including the element inside, and an ejection orifice ejecting the ink is provided, and the ink in the pressure chamber is circulated between the pressure chamber and the outside of the pressure chamber; and transferring the ink image onto a recording medium by bringing the recording medium into contact with the transfer body on which the ink image is formed, wherein a viscosity of the ink is 2 mPa·s or more to 20 mPa·s or less.

Abstract: A fluid ejection device may include a substrate having front and back opposing surfaces and a slot extending through the substrate between the back and front surfaces and along an axis of the substrate. A recessed end region may be formed in the back surface at each end of the slot.

Abstract: A printed circuit board has a first coefficient of thermal expansion. A compound is molded about the printed circuit board. The compound has a second coefficient of thermal expansion different than the first coefficient of thermal expansion. An interface is between an edge of the printed circuit board and the compound. The interface has a third coefficient of thermal expansion between the first coefficient of thermal expansion and the second coefficient of thermal expansion.

Abstract: In some examples, a print head comprises a plurality of nozzles comprising respective heaters on the print head, each heater of the heaters to be driven by a respective firing pulse to form a bubble in a corresponding nozzle. The print head further comprises a first time repository on the print head to store a first time instant, and a second time repository on the print head to store a second time instant, and a plurality of detect circuits provided onto the print head and coupled to corresponding nozzles of the plurality of nozzles, wherein each respective detect circuit of the plurality of detect circuits is to detect a change in respective impedances for a respective nozzle at the first time instant and the second time instant.

Abstract: According to an example, a fluid ejection device may include a fluid feed slot, a plurality of fluid ejection chambers in fluid communication with the fluid feed slot, a plurality of drop ejecting elements, in which a drop ejecting element of the plurality of drop ejecting elements is positioned within each of the plurality of fluid ejection chambers, a fluid circulation channel in fluid communication at a first end of the fluid circulation channel with the fluid feed slot and in fluid communication at multiple second ends of the fluid circulation channel with the plurality of fluid ejection chambers, and a fluid circulating element within the fluid circulation channel. The fluid ejection device may also include a bubble dissipating structure positioned within the fluid circulation channel outside of the plurality of fluid ejection chambers.

Abstract: A liquid container for accommodating a liquid includes: a plurality of detection electrodes mounted on the liquid container and connected to a detection circuit installed outside the liquid container, wherein the plurality of detection electrodes detects a tilt of the liquid container.

Abstract: A liquid discharge head includes a recording element substrate having first to fourth discharge port groups, each of which includes a plurality of discharge ports for discharging liquid, first flow path connecting a first liquid tank to the first discharge port group, a second flow path connecting a second liquid tank to the second discharge port group, and a third flow path connecting a third liquid tank to the third discharge port group and the fourth discharge port group, wherein a flow resistance in the first flow path is smaller than a flow resistance in the second flow path and larger than a flow resistance in the third flow path, and wherein a ratio of the flow resistance in the second flow path to the flow resistance in the third flow path is 4 or less.

Abstract: A method for imparting water repellency to a surface of a member includes a step in which a material including a compound containing a fluorine atom is deposited on a surface of a photosensitive resin layer in order to form a member including a material layer; a first exposure step in which the member is exposed to an amount of light with an exposure apparatus in order to form a latent image in the member; a development step in which the member including the latent image is developed; and a second exposure step in which the member is exposed to an amount of light with an exposure apparatus subsequent to the development step.