Class / Patent application number | Description | Number of patent applications / Date published |
347062000 | Resistor specifics | 62 |
20080225088 | Fluid jet device and method for manufacturing the same - A fluid jet device and a method for manufacturing the same are provided. The fluid jet device includes a substrate, a resistor layer and an orifice layer. The resistor layer is formed on the substrate. The resistor layer includes tantalum, silicon and nitrogen. The orifice layer is disposed on over the substrate to form a manifold between the orifice layer and the substrate. The manifold is used for containing a fluid. The orifice layer has a nozzle communicated with to the manifold. When the resistor layer is charged, the resistor layer heats the adjacent fluid to generate a bubble therein so as to allow the fluid to be pushed out of the nozzle. | 09-18-2008 |
20080259129 | INKJET PRINTHEAD HAVING LOW MASS EJECTION HEATER - An inkjet printhead is provided having ink chambers on a first surface of a substrate. Each ink chamber has an ink ejection nozzle, a heater arranged so as to heat the ink to form a gas bubble and thereby cause ejection of an ink drop from the associated nozzle and ink supply passages formed in the substrate from an opposite, second surface of the substrate, so that each ink supply passage supplies ink to an associated one of the ink chambers. A length of the passages through the substrate from the second surface to the associated ink chambers is configured to prevent reverse ink flow into the passages after ink ejection. Each heater includes solid material and has a mass of less than 10 nanograms of the solid material, which is configured to be heated to cause formation of the gas bubble. | 10-23-2008 |
20080266364 | METHOD OF EJECTING DROPS FROM PRINTHEAD WITH PLANAR BUBBLE NUCLEATING HEATER ELEMENTS - A method of ejecting drops of an ejectable liquid from a printhead is provided. The printhead has nozzles with bubble forming chambers, a heater element(s) disposed in the chambers configured for thermal contact with a bubble forming liquid and having bubble nucleation sections of smaller cross section than the rest of the heater element, and drive circuitry for controlling operation of the heater elements via electrodes, with parts of the drive circuitry disposed on opposing sides of the chambers. The method includes heating the heater elements by applying actuation energy of less than 500 nJ to form a gas bubble in the liquid that causes drop ejection from the nozzles and supplying the nozzle with a replacement volume of the liquid equivalent to the ejected drop. The bubble nucleation sections and the rest of the heater elements are co-planar and remain co-planar when heater elements are heated. | 10-30-2008 |
20080303872 | NOZZLE ARRANGEMENT FOR AN INKJET PRINTER CONFIGURED TO MINIMIZE THERMAL LOSSES - Provided is a nozzle arrangement for an inkjet printer. The nozzle arrangement includes a wafer substrate defining an ink passage and a nozzle plate supported on said substrate by side walls to define an ink chamber operatively supplied with ink via said ink passage, the nozzle plate defining an ink ejection port surrounded by a nozzle rim. The arrangement also includes a heater element bonded to the nozzle plate about said ejection port inside the chamber for thermal ejection of ink from the chamber, wherein the heater element is bonded to the nozzle plate by means of a low thermal product layer to reduce thermal losses from the heater element to the nozzle plate. | 12-11-2008 |
20090002459 | Printhead With Low Viscous Drag Droplet Ejection - A inkjet printhead with heater elements adjacent an array of respective nozzles for heating a water-based printing fluid to form a gas bubble for ejecting a drop of the printing fluid from the nozzle. The heater is separated from the nozzle by less than 5 μm at their closest points and the nozzle length is less than 5 μm. The volume of liquid between the heater and the nozzle determines the inertia of the liquid and its acceleration in response to bubble formation. Moving the heater closer to the nozzle reduces the inertia of the liquid and increases its acceleration, so a lower bubble impulse is needed to eject a drop. This allows the printhead to use smaller heater elements with lower power requirements. Viscous drag in the nozzle reduces the momentum of fluid flowing through the nozzle. The viscous drag increases as the nozzle length (in the direction of fluid flow) increases. By reducing the nozzle length, a lower bubble impulse is needed to eject a drop. This also allows the printhead to use smaller heater elements with lower power requirements. | 01-01-2009 |
20090015639 | INK JET RECORDING HEAD - An ink jet recording head includes ejection resistors for generating thermal energy for ejecting ink; warming resistors for generating thermal energy for heating the ink; ejection outlets, provided correspondingly to the ejection resistors, for ejecting the ink; and a recording element substrate provided with ink flow paths provided correspondingly to and for supplying the ink to the ejection outlets, the ejection resistors, the warming resistors, a first ejection outlet array portion including the ejection outlets, and a second ejection outlet array portion including the ejection outlets. An amount of one ink droplet to be ejected from an ejection outlet of the first ejection outlet array portion is different from that from an ejection outlet of the second ejection outlet array portion. The warming resistors are formed above the recording element substrate through the ejection resistors and an insulating layer with respect to a lamination direction of the recording element substrate and are disposed between the ejection resistors and the ink flow paths. The warming resistors include a first warming resistor disposed at the first ejection outlet array portion with a larger ejection amount and a second warming heat generating resistor disposed at the second ejection outlet array portion with a smaller ejection amount. | 01-15-2009 |
20090027456 | HEATING ELEMENT - Embodiments of a heating element of a fluid ejection device are disclosed. | 01-29-2009 |
20090033719 | INK JET RECORDING HEAD - An ink jet recording head includes an ejection outlet array including a plurality of ejection outlets; an ink flow path portion in fluid communication with said ejection outlets to supply ink to said ejection outlets; a recording element substrate provided with said ejection outlet array, said ink flow path portion and a plurality of ejection heat generating resistors, provided correspondingly to said ejection outlets, for generating thermal energy for ejecting ink; a first warming heat generating resistor which is provided in lower layers of said ejecting heat generating resistors and which is extended below said ink flow path portion; and a second warming heat generating resistor provided in an outer peripheral portion of said recording element substrate. | 02-05-2009 |
20090033720 | PRINTHEAD HAVING EFFICIENT HEATER ELEMENTS FOR SMALL DROP EJECTION - A printhead is provided having a plurality of nozzles and a plurality of heater elements each for heating an ejectable liquid to cause ejection of a drop of the ejectable liquid from a respective one of the nozzles. Each heater element is configured such that drops having drop volumes of less than 2 picolitres are ejected with a temperature rise in the ejectable liquid of less than 40 degrees Celsius above ambient temperature. | 02-05-2009 |
20090058951 | PRINTER SYSTEM HAVING WIDE HEATER ELEMENTS IN PRINTHEAD - A printer system is provided having a printhead which has nozzles, a bubble forming chamber corresponding to each nozzle, and heater elements disposed in each chamber each configured for thermal contact with a bubble forming liquid such that heating heater elements to a temperature above the boiling point of the bubble forming liquid forms a gas bubble that causes the ejection of a drop of an ejectable liquid through the nozzles. Each heater element is an elongate strip suspended between corresponding electrodes on opposite sides of the chamber. Each strip has a cross-section with a lateral dimension different than that of each other strip of the corresponding chamber and at least triple that of the thickness of that strip. The thickness of each strip is less than 0.3 microns. The heater elements and electrodes are arranged so that the electrodes are non-coincident with the electrodes of the other heater elements. | 03-05-2009 |
20090066762 | Thermal Printhead With Heater Element And Nozzle Sharing Common Plane Of Symmetry - An ink jet printhead that has a nozzle aperture | 03-12-2009 |
20090073240 | INKJET PRINTHEAD HAVING NOZZLE ARRANGEMENTS WITH ACTUATOR PIVOT ANCHORS - Provided is an inkjet printhead having a plurality of nozzle arrangements for ejecting ink onto a printing medium. Each nozzle arrangement includes a substrate defining an ink chamber having an ink inlet and a plurality of ink ejection ports, the chamber and ink supply channel being in fluid communication via the ink inlet. Each arrangement also includes a pivot anchor arranged on the substrate, and an actuator fast with the pivot anchor and arranged to cause selective ejection of ink from any one of the ejection ports while simultaneously causing an inflow of ink from the ink supply channel into the chamber via the ink inlet. | 03-19-2009 |
20090085981 | Printhead integrated circuit with vapor bubbles offset from nozzle axis - A printhead integrated circuit for an inkjet printer that has a plurality of nozzle apertures | 04-02-2009 |
20090096839 | FLUID EJECTION DEVICE - A fluid ejection device includes a fluid chamber, a resistor formed within the fluid chamber, and an orifice communicated with the fluid chamber, wherein the fluid ejection device is adapted to eject drops of a non-aqueous fluid, and wherein a ratio of a square root of an area of the resistor to a diameter of the orifice is in a range of approximately 1.75 to approximately 2.25. | 04-16-2009 |
20090096840 | Inkjet Printhead - An inkjet printhead includes a substrate having an ink feed hole formed therethrough and a plurality of ink drop generators formed on the substrate. The drop generators define a stagger pattern, and the ink feed hole defines a sidewall that is shaped so as to match the stagger pattern. In one embodiment, a support membrane is embedded in the substrate along an edge of the ink feed hole. | 04-16-2009 |
20090102891 | HEATING RESISTOR ELEMENT, MANUFACTURING METHOD FOR THE SAME, THERMAL HEAD, AND PRINTER - Provided is a heating resistor element ( | 04-23-2009 |
20090160910 | INKJET PRINTHEAD WITH HEATER ELEMENT CLOSE TO DRIVE CIRCUITS - A printhead with drive circuitry for a heating element. At least part of the drive circuitry is positioned proximate to and within 60 microns of the heating element. Moving the drive circuitry within 60 microns of the heating element enhances the nozzle packing on the printhead substrate and improves its energy efficiency. | 06-25-2009 |
20090160911 | PRINTHEAD HAVING OVERLAYED HEATER AND NON-HEATER ELEMENTS - A printhead is provided having a plurality of nozzles, a plurality of chambers for holding a liquid for ejection from the nozzles, and heater and non-heater elements in contact with the liquid in the chambers. Each heater element overlays an associated non-heater element with a space therebetween. The heater elements are heated by connected electrodes to heat the liquid thereby forming gas bubbles in the heated liquid which cause ejection of the liquid from the nozzles. Each chamber has a circular cross section and each heater element has arcuate sections that are concentric with the circular cross section. | 06-25-2009 |
20090195619 | Thin Nozzle Layer Printhead - An inkjet printhead that has a nozzle layer defining an array of nozzle apertures and a substrate for supporting the nozzle layer, the substrate defining a flow path for an ejectable liquid to each nozzle. Each nozzle aperture has an associated heater element positioned for heating the ejectable liquid above its boiling point to form a vapor bubble to eject a drop of the ejectable liquid through the nozzle aperture. The nozzle aperture is less than 5 microns thick in the drop ejection direction. | 08-06-2009 |
20090195620 | Inkjet Printhead With Heaters Mounted Proximate Thin Nozzle Layer - An inkjet printhead for ejecting drops of a printing fluid onto a media substrate. The inkjet printhead has an array of nozzle apertures defined in a nozzle layer less than 10 microns thick and a heater element adjacent each of the nozzles respectively for heating printing fluid to form a vapor bubble that ejects a drop of the printing fluid through the nozzle aperture corresponding to that heater element. The heater element is a layer of resistive material extending parallel to the nozzle layer and spaced less than 50 microns from the nozzle layer. | 08-06-2009 |
20090213183 | Printhead Having Low Mass Bubble Forming Heaters - A printhead is provided having a plurality of chambers on a substrate, each chamber having a nozzle, a heater arranged in each chamber so as to heat fluid within the chamber to form a gas bubble therein and thereby cause ejection of a drop from the corresponding nozzle, and a plurality of passages formed in the substrate so that each passage supplies the fluid to an associated one of the chambers. Each heater includes solid material and has a mass of less than 10 nanograms of the solid material, which is configured to be heated to cause formation of the gas bubble. | 08-27-2009 |
20090213184 | Micro-Electromechanical Nozzles Having Low Weight Heater Elements - Provided is a pagewidth printhead having a plurality of micro-electromechanical nozzle arrangements. Each nozzle arrangement includes side walls located on a wafer substrate with a roof portion attached to said walls to define a printing fluid chamber. The roof portion defines an ejection port. Each nozzle arrangement also includes an inlet defined in the substrate to supply the fluid chamber with printing fluid, and at least one heater element having a mass of less than 10 nanograms suspended between the side walls in the fluid chamber. In operation, when electrical actuation energy of less than 500 nanojoules is applied to the heater element, the printing fluid undergoes thermal cavitation which increases fluid pressure in the chamber thereby ejecting printing fluid from the ejection port. | 08-27-2009 |
20090213185 | Inkjet Printer Utilizing Low Energy Titanium Nitride Heater Elements - An inkjet printer comprises an array of nozzles extending substantially a width of a print media fed through the inkjet printer; and a plurality of heater elements each corresponding to a nozzle, the heater elements being formed substantially of titanium nitride. The heater elements are provided in contact with a bubble forming liquid and sized to heat the bubble forming liquid above a boiling point thereof upon application of 200 nJ or less of energy to each heater element. | 08-27-2009 |
20090237459 | INKJET PRINTHEAD ASSEMBLY FOR SYMMETRICAL VAPOR BUBBLE FORMATION - An inkjet printhead assembly comprises a substrate defining a plurality of ink inlet passages; drive circuitry arranged on the substrate; a plurality of nozzle chamber structures arranged on the substrate and defining (i) nozzle chambers in fluid communication with respective ink inlet passages, and (ii) ink ejection ports in fluid communication with respective nozzle chambers; and a heater element suspended within and spanning each nozzle chamber, the heater element connected to the drive circuitry to heat ink in the nozzle chamber to form a vapor bubble around the heater element, the heater element being positioned within the nozzle chamber such that a distance between a point of collapse of the vapor bubble and respective ink ejection ports is less than 50 microns. The heater element is provided with a double omega configuration having symmetrical gaps at opposed sides thereof, whereby symmetrical formation of the vapor bubble centered on an axis of the nozzle is effected. | 09-24-2009 |
20090244197 | Thermal Inkjet Printhead With Double Omega Shaped Heating Element - An inkjet printhead for ejecting printing fluid comprises a plurality of nozzles arranged in an array; a plurality of heater elements, each heater element corresponding to one of the nozzles respectively, each heater element having a double omega shape in which two gaps are defined at an outer circumference thereof at opposite sides of the heater element; and drive circuitry for sending each of the heater elements a pulse of electrical energy to form a vapor bubble in the printing fluid. | 10-01-2009 |
20090267996 | HEATER STACK WITH ENHANCED PROTECTIVE STRATA STRUCTURE AND METHODS FOR MAKING ENHANCED HEATER STACK - A heater stack includes first strata configured to support and form a heater element responsive to electrical activation and second strata overlying the first strata and having different thicknesses in various portions overlying the heater element to enhance its protection from adverse effects of cavitation occurrences on the second strata. A first portion of the second strata where adverse effects of cavitation occurrences are more likely overlies opposite ends of the heater element and has a first thickness. A second portion of the second strata where adverse effects of cavitation occurrences are less likely has a planar structure overlying and extending between the opposite ends of the heater element. The second portion also has a second thickness less than the first thickness of the first portion. The first portion has a step-like structure relative to and protruding above the planar structure of the second portion. | 10-29-2009 |
20090309932 | HEATER OF AN INKJET PRINTHEAD AND METHOD OF MANUFACTURING THE HEATER - A heater of a thermal inkjet printhead. The heater is formed of tantalum aluminum oxynitride (Ta—Al—ON), wherein the tantalum aluminum oxynitride is formed of about 30 to about 60 atomic % tantalum, about 10 to about 30 atomic % aluminum, about 5 to about 30 atomic % oxygen, and about 5 to about 30 atomic % nitrogen. | 12-17-2009 |
20100039477 | THERMAL INKJET PRINTHEAD AND METHOD OF DRIVING SAME - Provided are an inkjet printhead and a method of driving the inkjet printhead. The inkjet printhead includes a heater configured to heat ink to produce ink bubbles, an electrode configured to apply or provide the current to the heater, and a resistor connected to the electrode and separated by a distance from the heater. The resistor having a negative temperature coefficient of resistance (NTC) that can be used to compensate for the effects that temperature has on the ejection speed and mass of ejected ink droplets produced by the inkjet printhead and that result from temperature changes that occur during the operation of the inkjet printhead. | 02-18-2010 |
20100045750 | INKJET PRINTHEAD WITH SYMETRICAL HEATER AND NOZZLE SHARING COMMON PLANE OF SYMMETRY - An ink jet printhead that has a nozzle aperture that defines a planar opening having two planes of symmetry, both of which extend perpendicular to the plane of the opening. The printhead also having a heater corresponding to the nozzle aperture for generating a gas bubble in printing fluid to eject a drop of the printing fluid through the nozzle aperture. The heater element is a suspended beam that has two planes of symmetry and at least one of the heater element planes of symmetry is common to one of the nozzle aperture plane of symmetry. | 02-25-2010 |
20100045751 | Printer With Nozzles For Generating Vapor Bubbles Offset From Nozzle Axis - An inkjet printer that has a plurality of nozzle apertures, each with a nozzle axis normal to, extending through the center of the nozzle aperture. A chamber corresponds to each of the nozzles respectively. An inlet to supply the bubble forming chamber with liquid. A heater element is disposed in each of the bubble forming chambers respectively. The heater element configured as a beam suspended at its ends for immersion in the liquid such that heating the heater element forms a gas bubble that ejects a drop of the liquid through the nozzle corresponding to that heater element. The heater element is a planar structure parallel to the nozzle aperture and nucleates the gas bubble with a bubble centre offset from the nozzle axis towards the inlet. Offsetting the gas bubble towards the inlet reduces the variation in drop trajectories caused by reverse flow out of the inlet when the pressure pulse is generated. | 02-25-2010 |
20100060698 | Inkjet Printhead With Heaters Suspended By Sloped Sections Of Less Resistance - An inkjet printhead that has a pair of electrodes, a heater having contacts abutting the pair of electrodes, a heater element for generating a vapour bubble in a quantity of ink and sloped side portions extending between the heater element and the contacts and, a nozzle spaced from the heater such that ink is ejected through the nozzle in response to the generation of a vapour bubble. The heater element has higher electrical resistance than the contacts and the sloped side portions. | 03-11-2010 |
20100091072 | Inkjet Printhead Nozzle Arrangement Having Non-Coincident Low Mass Electrode And Heater Element - An inkjet printhead nozzle arrangement includes side walls provided on a wafer substrate and a roof layer deposited on said side walls to define an ink chamber, the roof layer defining a nozzle aperture; an inlet defined in the substrate to supply the ink chamber with printing fluid; and at least one heater element having two opposite sides parallel to a plane of the ejection aperture, the heater element adapted to generate a gas bubble at both of said opposite sides. The heater elements and associated electrodes are arranged in the chamber to be non-coincident and have an annular shape facilitating a point of collapse of the bubble near a centre thereof The heater element has a mass of less than 10 nanograms. | 04-15-2010 |
20100128090 | Mems Bubble Generator Incorporating Superalloy Heater In Direct Contact With Bubble Formation Liquid Without Intervening Protective Coating - A MEMS vapor bubble generator includes a chamber for holding liquid; and a heater positioned in the chamber, the heater being formed using a sputtering technique. The heater is formed from a superalloy material. The superalloy material of the heater is in direct contact with the liquid, without any intervening protective coating. The superalloy has a crystalline structure with a grain size less than 100 nano-metres. The superalloy is MCrAlX, where M is one or more of Ni, Co, Fe with M contributing at least 50% by weight, Cr contributing between 8% and 35% by weight, Al contributing more than zero but less than 8% by weight, and X contributing less than 25% by weight, with X consisting of zero or more other elements, preferably including but not limited to Mo, Re, Ru, Ti, Ta, V, W, Nb, Zr, B, C, Si, Y, Hf. | 05-27-2010 |
20100165052 | Heater Stack Having Resistive Layer with Underlying Insulative Gap and Method for Making Heater Stack - A heater stack includes first strata configured to support and form a fluid heater element responsive to energy from repetitive electrical activation and deactivation to fire repetitive cycles of heating and ejecting fluid from an ejection chamber above the fluid heater element and second strata overlying the first strata and contiguous with the ejection chamber to provide protection of the fluid heater element. The first strata includes a substrate and a heater substrata overlying the substrate and including a resistive layer having lateral portions spaced apart, a central portion extending between the lateral portions and defining the fluid heater element, and transitional portions interconnecting the central portion and lateral portions and elevating the central portion relative to the lateral portions and above the substrate to form a gap between the lateral portions and between the central portion and substrate insulating the substrate from the fluid heater element. | 07-01-2010 |
20100165053 | INKJET PRINTHEAD SUBSTRATE WITH DISTRIBUTED HEATER ELEMENTS - A substrate heating system for an inkjet printhead. The substrate heating system includes heating resistors distributed in association with the ink jet nozzle structures, and located thermally adjacent thereto. The plural switching transistors that control the current through the substrate heating resistors are also distributed with the ink jetting nozzle structures, together with the substrate heating resistors. Polysilicon is used in constructing the substrate heating resistors. Cells of the substrate heaters can be arranged physically in a linear manner, along the nozzle structures. The substrate heater cells can be controlled so that the temperature of various zones of nozzle structures can be controlled. | 07-01-2010 |
20100171795 | INKJET PRINTHEAD INTERGRATED CONFIGURED TO MINIMIZE THERMAL LOSSES - Provided is an inkjet printhead integrated circuit that has a wafer substrate that has an ink passage, and a nozzle plate supported on the substrate by side walls to define an ink chamber supplied with ink via the ink passage. The nozzle plate has an ink ejection port corresponding to the ink chamber. A heater element is bonded to the nozzle plate inside the chamber for vaporising ink to generate a vapour bubble that ejects ink through the ejection port. The heater element is bonded to the nozzle plate with a low thermal product layer. The thermal product thermal product is less than 1495 Jm | 07-08-2010 |
20100231655 | INKJET-PRINTING DEVICE PRINTHEAD DIE HAVING EDGE PROTECTION LAYER FOR HEATING RESISTOR - A printhead die ( | 09-16-2010 |
20100231656 | METHOD OF EJECTING FLUID USING WIDE HEATER ELEMENT - A method of ejecting fluid from a printhead nozzle is provided. The printhead nozzle has a fluid chamber, a fluid ejection port, electrodes on opposite sides of the chamber and a heater element suspended between the electrodes. The heater element has a cross section with a lateral dimension at least triple that of the thickness of heater element. The he thickness of the heater element being less than 0.3 microns. In the method the heater element is heated to a temperature above the boiling point of the fluid to form a gas bubble that causes ejection of a drop of the fluid from the ejection port, and the chamber is supplied with a replacement volume of the fluid equivalent to the ejected drop. | 09-16-2010 |
20100245485 | INKJET PRINTHEAD WITH SUSPENDED HEATER ELEMENT SPACED FROM CHAMBER WALLS - An inkjet printhead is provided having a substrate defining inlet passages, sidewalls extending from the substrate, and a nozzle plate supported by the sidewalls and defining nozzle apertures. The nozzle plate, the sidewalls and the substrate define chambers. The printhead further has a heater element suspended within each of the chambers. The heater element has a planar structure parallel to the plane of the nozzle plate, and a spacing between the heater element and each sidewall of the chamber is between 0.1 microns and 20 microns. The heater element heats a liquid in the chamber to form a gas bubble. The gas bubble causes the ejection of a drop of the liquid through the nozzle aperture. | 09-30-2010 |
20100271440 | PRINTHEAD INTEGRATED CIRCUIT HAVING LOW MASS HEATER ELEMENTS - A printhead integrated circuit includes: a plurality of nozzle chambers disposed on a substrate; a heater element positioned in each nozzle chamber; drive circuitry for supply power to each heater element; and a plurality of ink supply channels defined in the substrate for supplying fluid to the nozzle chambers. Each heater element consists of solid material having a mass of less than 10 nanograms. In use, the solid material is heated to cause formation of a gas bubble inside each nozzle chamber. | 10-28-2010 |
20110080454 | Firing Cell - A system is provided that includes first means for pre-charging a node to a first potential where the node coupled to a switch configured to control current through a firing resistor and second means for selectively discharging the node to a second potential across a path that has only one transistor between the node and the second potential. | 04-07-2011 |
20110211025 | PRINTHEAD NOZZLE HAVING HEATER OF HIGHER RESISTANCE THAN CONTACTS - A printhead nozzle is provided having a plurality of electrodes, a heater having contacts abutting the electrodes, a heater element for heating a quantity of fluid and sloped side portions extending between the heater element and the contacts, and a nozzle spaced from the heater such that the heated fluid is ejected through the nozzle. The heater element has higher electrical resistance than the contacts and the sloped side portions. | 09-01-2011 |
20120224006 | INK JET PRINT HEAD - An ink jet print head is provided which has a reduced size and 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. | 09-06-2012 |
20120314004 | INKJET PRINTHEAD HAVING TITANIUM ALUMINIUM NITRIDE HEATER ELEMENTS - Provided is an inkjet printhead integrated circuit that has a wafer substrate that has an ink passage, and a nozzle plate supported on the substrate by side walls to define an ink chamber supplied with ink via the ink passage. The nozzle plate has an ink ejection port corresponding to the ink chamber. A heater element is bonded to the nozzle plate inside the chamber for vaporising ink to generate a vapour bubble that ejects ink through the ejection port. The heater element is bonded to the nozzle plate with a low thermal product layer. The thermal product thermal product is less than 1495 Jm | 12-13-2012 |
20130083131 | THERMAL RESISTOR FLUID EJECTION ASSEMBLY - A thermal resistor fluid ejection assembly includes an insulating substrate and first and second electrodes formed on the substrate. A plurality of individual resistor elements of varying widths are arranged in parallel on the substrate and electrically coupled at a first end to the first electrode and at a second end to the second electrode. | 04-04-2013 |
20130286104 | Thermal Fluid-Ejection Echanism Having Heating Resistor On Cavity Sidewalls - A thermal fluid-ejection mechanism includes a substrate having a top surface. A cavity formed within the substrate has one or more sidewalls and a floor. The angle of the sidewalls from the floor is greater than or equal to nominally ninety degrees. The thermal fluid-ejection mechanism includes a patterned conductive layer on one or more of the substrate's top surface and the cavity's sidewalls. The thermal fluid-ejection mechanism includes a patterned resistive layer on the sidewalls of the cavity. The patterned resistive layer is located over the patterned conductive layer where the patterned conductive layer is formed on the sidewalls of the cavity. The patterned resistive layer is formed as a heating resistor of the thermal-fluid ejection mechanism. The conductive layer is formed as a conductor of the thermal-fluid ejection mechanism, to permit electrical activation of the heating resistor to cause fluid to be ejected from the thermal fluid-ejection mechanism. | 10-31-2013 |
20130286105 | Fluid Ejection Assembly and Related Methods - In one embodiment, a fluid ejection device includes a substrate with a fluid slot and a membrane adhered to the substrate that spans the fluid slot. A resistor is disposed on top of the membrane over the fluid slot, and a fluid feed hole next to the resistor extends through the membrane to the slot. A shelf extends from the edge of the resistor to the edge of the feed hole, and a passivation layer covers the resistor and part the shelf. An etch-resistant layer is formed partly on the shelf and in between the fluid feed hole and the resistor. | 10-31-2013 |
20130307907 | THERMAL PRINTHEAD AND METHOD OF MANUFACTURING THE SAME - A thermal printhead includes a substrate, a resistor layer formed on the substrate, an electrode layer formed on the substrate and electrically connected to the resistor layer, and an insulating layer. The electrode layer includes a first electrically conductive portion and a second electrically conductive portion spaced apart from each other. The resistor layer includes a heater portion that bridges the first electrically conductive portion and the second electrically conductive portion as viewed in the thickness direction of the substrate. The insulating layer includes a portion positioned between the electrode layer and the heater portion. This arrangement reduces formation of a eutectic region between the heater portion and the electrode layer. | 11-21-2013 |
20130321531 | RING-TYPE HEATING RESISTOR FOR THERMAL FLUID-EJECTION MECHANISM - A ring-type heating resistor for a thermal fluid-ejection mechanism includes resistive segments and conductive segments. The resistive segments are rectangular in shape. The resistive segments are separated from one another. The conductive segments are interleaved in relation to the resistive segments such that each conductive segment electrically connects two of the resistive segments. The resistive segments and the conductive segments together form a pseudo-ring that approximates a true ring. | 12-05-2013 |
20140043398 | Thermal Inkjet Latex Inks - In one example, an anti-fouling latex ink includes a liquid vehicle, a pigment dispersed in the liquid vehicle, latex dispersed in the liquid vehicle, and a polystyrene anti-fouling additive dispersed in the liquid vehicle as a free solution. An illustrative method of formulating a latex inkjet ink includes forming a liquid vehicle with water as primary solvent, dispersing pigments in the liquid vehicle, and adding | 02-13-2014 |
20140104344 | HEATING RESISTOR - A heating element of a fluid ejection device, the heating element including a ring-type body, an inner edge of the body, and an outer edge of the body, wherein at least one of the inner edge and the outer edge defines an undulated surface contour. | 04-17-2014 |
20140184703 | SUBSTRATE FOR INKJET HEAD, INKJET HEAD, AND INKJET PRINTING APPARATUS - There are provided a substrate for an inkjet head, an inkjet head, and an inkjet printing apparatus wherein in a case where current is carried through a protection layer for heating resistors, electrical connection to its periphery is prevented without fail. The substrate for the inkjet head includes a first protection layer disposed to cover a heating resistor layer and having an insulation property and a second protection layer disposed to contact the first protection layer and having conductivity. The second protection layer includes a plurality of individual sections provided to correspond to the plurality of heating resistors, a common section connecting the plurality of individual sections, and fuse sections connecting the individual sections and the common section, the fuse sections being formed to be thinner than the individual sections. | 07-03-2014 |
20140340452 | INK JET PRINTHEAD WITH POLARITY-CHANGING DRIVER FOR THERMAL RESISTORS - An ink jet printhead device includes a substrate and a plurality of thermal resistors on the substrate. Each thermal resistor includes first and second electrodes and a resistive layer extending therebetween. A polarity-changing driver is coupled to the plurality of thermal resistors and configured to change a driving polarity between the first and second electrodes of each of the plurality of thermal resistors. | 11-20-2014 |
20150029268 | LIQUID EJECTION HEAD, LIQUID EJECTION METHOD, AND PRINTING APPARATUS EMPLOYING THIS EJECTION HEAD - A liquid ejection head that the adverse effect of a heating resistor element due to cavitation is reduced and a printing apparatus employing this liquid ejection head are provided. When a length of a heating resistor element in a direction in which ink is to be supplied is defined by L, the center of an ejection port is shifted, at a distance of equal to or longer than L/7 toward a location of an ink supply port, from the center of the heating resistor element, viewed in a direction in which ink is to be ejected. When a length of the ejection portion in the direction in which ink is to be ejected is defined as l and a length of a bubble generation chamber in the direction in which the liquid is to be ejected is defined as h, l/h is equal to or smaller than 2. | 01-29-2015 |
20150070441 | THERMO-PNEUMATIC ACTUATOR WORKING FLUID LAYER - An ink jet printhead including a thermo-pneumatic actuator array for ejecting ink from an array of nozzles. The actuator array may include a plurality of channels in fluid communication with a plurality of working fluid chambers. After completing formation of the actuator array, working fluid may be injected into a working fluid inlet on an exterior of the actuator array and into the plurality of working fluid chambers through the plurality of channels. | 03-12-2015 |
20150343780 | LIQUID DISCHARGE HEAD - A liquid discharge head includes a substrate, a heat resistor layer, and a side wall member that forms a side wall of a pressure chamber. The heat resistor layer has a heat effect portion configured to foam liquid in an interior of the pressure chamber to discharge liquid from a discharge port. The heat effect portion is apart from the substrate, at least part of a surface of the heat resistor layer is covered with a covering layer in the interior of the pressure chamber, and the covering layer extends from the interior of the pressure chamber to a position coming into contact with the side wall of the side wall member. | 12-03-2015 |
20160075136 | THERMAL INKJET PRINTHEAD STACK WITH AMORPHOUS THIN METAL PROTECTIVE LAYER - The present disclosure is drawn to a thermal inkjet printhead stack with an amorphous thin metal protective layer, comprising an insulated substrate, a resistor applied to the insulated substrate, a resistor passivation layer applied to the resistor, and an amorphous thin metal protective layer applied to the resistor passivation layer. The amorphous thin metal protective layer can comprise from 5 atomic % to 90 atomic % of a metalloid of carbon, silicon, or boron. The film can also include a first and second metal, each comprising from 5 atomic % to 90 atomic % of titanium, vanadium, chromium, cobalt, nickel, zirconium, niobium, molybdenum, rhodium, palladium, hafnium, tantalum, tungsten, iridium, or platinum. The second metal is different than the first metal, and the metalloid, the first metal, and the second metal account for at least 70 atomic % of the amorphous thin metal protective layer. | 03-17-2016 |
20160114584 | THERMAL INKJET PRINTHEAD STACK WITH AMORPHOUS METAL RESISTOR - The present disclosure is drawn to a thermal inkjet printhead stack with an amorphous metal resistor, including an insulated substrate and a resistor applied to the insulated substrate. The resistor can include from 5 atomic % to 90 atomic % of a metalloid of carbon, silicon, or boron; and from 5 atomic % to 90 atomic % each of a first and second metal of titanium, vanadium, chromium, cobalt, nickel, zirconium, niobium, molybdenum, rhodium, palladium, hafnium, tantalum, tungsten, iridium, or platinum, where the second metal is different than the first metal. The metalloid, the first metal, and the second metal can account for at least 70 atomic % of the amorphous thin metal film. | 04-28-2016 |
20160136957 | INKJET NOZZLE DEVICE HAVING IMPROVED LIFETIME - An inkjet nozzle device includes a resistive heater element for ejecting ink droplets through a nozzle opening. The resistive heater element includes: an aluminide layer having a native passivating oxide and a tantalum oxide layer disposed on the native passivating oxide of the aluminide layer. The tantalum oxide layer is a relatively thin layer, which may be deposited using atomic layer deposition. | 05-19-2016 |
20160375685 | LIQUID EJECTION HEAD SUBSTRATE AND LIQUID EJECTION HEAD - A liquid ejection head substrate includes a heating resistor array including a plurality of heating resistors and a protective film covering at least one of the heating resistors. The liquid ejection head substrate further includes a supply opening array and an electrode. The supply opening array is disposed on a side of a surface of the liquid ejection head substrate on which the protective film is provided. The supply opening array includes a plurality of supply openings through which a liquid is supplied arranged in a direction along the heating resistor array. The electrode is disposed on the side of the surface in a space between the supply openings adjacent to each other in a direction along the supply opening array. The electrode is configured such that a voltage is applied between the electrode and the protective film. | 12-29-2016 |
20170232743 | Fluid Ejection Device with Printhead Ink Level Sensor | 08-17-2017 |
20180022098 | REMOVING SEGMENT OF A METAL CONDUCTOR WHILE FORMING PRINTHEADS | 01-25-2018 |