Abstract: A photo-curable resin composition, a method of patterning the same, an ink jet head, and a method of fabricating the same. The photo-curable resin composition includes an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent. The photo-catalyst may be a semiconductor material to generate electron-hall pairs using light energy. The semiconductor material is one selected from a group consisting of TiO2, CdS, Si, SrTiO3, WO, ZnO, SnO2, CdSe and CdTe, CdSe and CdTe. The epoxy compound may include a di-functional epoxy compound and a multi-functional epoxy compound. The non-photo reactive solvent may be one or a mixture selected from a group consisting of gamma-butyrolactone (GBL), cyclopentanone, C1-6 acetate, tetrahydrofurane (THF), and xylene. The photo-curable resin composition is patterned to form a fluid channel structure of the ink jet head.

Abstract: Thermal inkjet printheads and an inkjet image forming apparatus including the thermal inkjet printheads. Each of the thermal inkjet printheads includes a heater that heats ink by directly contacting the ink and is formed of an alloy of Pt—Ru or an alloy of Pt—Ir—X, where X is at least a material selected from the group consisting of Ta, W, Cr, Al, and O.

Abstract: A photo-curable resin composition, a method of patterning the same, an ink jet head, and a method of fabricating the same. The photo-curable resin composition includes an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent. The photo-catalyst may be a semiconductor material to generate electron-hall pairs using light energy. The semiconductor material is one selected from a group consisting of TiO2, CdS, Si, SrTiO3, WO, ZnO, SnO2, CdSe and CdTe, CdSe and CdTe. The epoxy compound may include a di-functional epoxy compound and a multi-functional epoxy compound. The non-photo reactive solvent may be one or a mixture selected from a group consisting of gamma-butyrolactone (GBL), cyclopentanone, C1-6 acetate, tetrahydrofurane (THF), and xylene. The photo-curable resin composition is patterned to form a fluid channel structure of the ink jet head.

Abstract: In a heater and an inkjet printhead having the same, the heater directly contacts and heats ink and is made of a Pt—Ir alloy.

Abstract: An inkjet printhead and a method of manufacturing the same includes a substrate, an ink chamber to contain ink having a predetermined depth in an upper side of the substrate and an ink feedhole to supply the ink to the ink chamber provided in a lower side of the substrate, a heater formed on the bottom of the ink chamber to heat the ink and to form an ink bubble, and a nozzle layer deposited on the substrate and having a nozzle connected to the ink chamber. The ink chamber is narrower toward the bottom thereof and a sidewall of the ink chamber has a concave round shape.

Abstract: An inkjet printhead includes a substrate including a plurality of restrictors formed in an upper surface thereof and an ink feedhole formed in a lower surface thereof, a chamber layer stacked on the substrate and comprising a plurality of ink chambers corresponding to the plurality of restrictors including ink to be ejected, wherein each of the ink chambers is formed on an upper portion of a corresponding one of the restrictors and is connected to the corresponding one of the restrictors, a plurality of heaters formed on a bottom surface of corresponding ones of the plurality of ink chambers to heat the ink therein to generate bubbles, and a nozzle layer stacked on the chamber layer and comprising nozzles to eject the ink.

Abstract: A thermally driven inkjet printhead includes a substrate, a heater formed on the substrate, a chamber layer stacked on the substrate to define an ink chamber on an upper portion of the heater and an ink feed hole to supply ink to the ink chamber at one side of the ink chamber, an intermediate layer stacked on the chamber layer in which a through hole connected to the ink chamber is formed, and a nozzle layer stacked on the intermediate layer in which a nozzle connected to the through hole is formed. The through hole is connected to the ink feed hole and has a smaller cross-sectional area than a size of the heater.

Abstract: An inkjet printhead and a method of manufacturing the same. The inkjet printhead may include a substrate in which a manifold to supply ink is formed in a lower portion of the substrate and a plurality of ink feed holes connected to the manifold are formed in an upper portion of the substrate, feed hole guides that are formed on inner sidewalls of the ink feed holes to define lengths of the ink feed holes, a chamber layer stacked on the substrate, the chamber layer including a plurality of ink chambers connected to the ink feed holes, a plurality of heaters to heat ink inside the ink chambers to generate bubbles, and a nozzle layer stacked on the chamber layer, the nozzle layer including a plurality of nozzles, the ink being ejectable through the nozzles.

Abstract: An Inkjet printhead and a method of manufacturing the same. The inkjet printhead includes a substrate having an ink feedhole, a chamber layer formed on the substrate to define an ink chamber filled with ink supplied though the ink feedhole, and a nozzle layer formed on the chamber layer and having one or more nozzles to eject the ink filled in the chamber, wherein the chamber layer and the nozzle layer are made of solid film resists.

Abstract: An inkjet printer head and fabrication method thereof. The inkjet printer head includes a substrate, a thermal layer formed on the substrate to generate thermal energy, a first electrode formed on the thermal layer except at a nozzle forming portion of the thermal layer, and a second electrode extending a predetermined distance to the nozzle forming portion of the thermal layer from a top portion of the first electrode to contact a central portion of the thermal layer. Accordingly, the inkjet printer head has high efficiency and durability.

Abstract: An inkjet printhead includes a substrate having an ink chamber which is filled with ink to be ejected, a nozzle plate formed on the substrate in a position corresponding to the ink chamber, and a heat generating resistor installed in the ink chamber and formed of TiNx, where x ranges from 0.2 to 0.5, to generate ink bubbles in the ink by generating heat.

Abstract: A method of manufacturing a monolithic inkjet printhead wherein the uniformity of the ink flow path is maintained by ensuring that the flow path forming layer and the nozzle layer are completely adhered to each other. The method includes forming a heater and electrode on a substrate, coating a negative photoresist on the substrate, and patterning the photoresist using a photolithography process to form an flow path forming layer that defines an ink flow path. The method further comprises steps for then forming a sacrificial layer so as to cover the flow path forming layer and then flattening upper surfaces of the flow path forming layer and the sacrificial layer using a chemical mechanical polishing (CMP) process such that when a nozzle layer is then formed, the flow path forming layer and the nozzle layer are completely adhered to each other.

Abstract: A method of manufacturing an inkjet printhead includes forming a first photoresist layer on a substrate having ink ejection devices disposed thereon by coating the substrate with a first negative photoresist, exposing the first photoresist layer through a first photomask formed that defines a pattern of ink chambers, forming a second photoresist layer on the first photoresist layer by coating the first photoresist layer with a second negative photoresist, exposing the second photoresist layer through a second photomask that defines a pattern of nozzles, forming a nozzle layer having the nozzles by developing the second photoresist layer, forming the ink chambers by developing the first photoresist layer through the nozzles, and forming an ink supply path by etching a lower surface of the substrate.

Abstract: An inkjet printhead includes a plurality of heaters connected with an electrode wiring and having a first end connected with a driving electrode, and a chamber pattern forming an ink chamber at each heater. The chamber pattern includes conductive material and forms a common grounding wiring electrically connected with a second end of each heater. Accordingly, the inkjet printhead has nozzles capable of simultaneous injection of ink.

Abstract: An inkjet printer head includes a substrate having a manifold and an ink channel to supply ink, a nozzle plate formed on the substrate, a chamber formed between the substrate and the nozzle plate and extending toward the substrate and the nozzle plate, an electrode formed at an interface between the substrate and the nozzle plate and around the chamber, and a heater having both ends extending in contact with the electrode to be suspended on the chamber in direct contact with the ink and to generate bubbles from both surfaces thereof. The inkjet printer head is capable of improving manufacturing process efficiency by omitting a process of separately forming a heater passivation layer, operating the heater at low electric power by omitting the heater passivation layer, improving integrity of a nozzle by lowering a working voltage, and improving reliability in manufacturing processes by locating the suspended heater to be in parallel with the substrate and the electrode.

Abstract: A filter plate usable with an ink jet head, an ink jet head with the filter plate, and a method of fabricating the filter plate are provided. The filter plate includes a filter substrate having a filter hole region. Filter holes having angled line shapes extend through the filter substrate of the filter hole region. Each of the filter holes may include an upper filter hole formed to have a first angle with respect to the filter substrate at an upper portion of the filter substrate, and a lower filter hole formed at a lower portion of the filter substrate to be connected to the upper filter hole and having a second angle with respect to the filter substrate different from the first angle.

Abstract: An inkjet printer head includes a substrate having an ink-feed hole to supply ink stored in a cartridge to an ink chamber and a restrictor in fluid communication with the ink chamber, an oxide layer formed on the substrate, a heater disposed on the oxide layer above the restrictor and having fixed parts disposed on the oxide layer, slopes extending upward and away from the restrictor at an incline, and a parallel part extending between the slopes parallel to the substrate, a lead formed to be in electrical contact with the heater, a chamber layer formed to cover the lead and to define the ink chamber, and a nozzle layer formed on the chamber layer and having a nozzle. In the inkjet printer head, the lifespan of the heater may be extended since the heater is supported by the slopes, which function as a shock absorbing member when ink supply pressure or cavitation force is applied to a surface of the heater.

Abstract: An inkjet printer head and method of fabricating the same includes a substrate having an ink-feed hole formed at a bottom surface of the substrate, a lower chamber formed at a top surface of the substrate, and a restrictor to fluid communicate between the ink-feed hole and the lower chamber, an oxide layer formed on the substrate, a heater formed on the oxide layer and disposed parallel to the surface of the substrate to cross the lower chamber, a lead electrically connected to the heater, and a nozzle layer disposed on the heater to configure an ink channel together with the lower chamber and having a nozzle at an upper portion of the nozzle layer. The inkjet printer head is capable of improving a thermal efficiency by heating the ink using both surfaces of the heater since the heater is disposed at a center of the ink chamber, and improving characteristics of the heater by making a current density and a current flow uniform since the heater is formed in a straight line without any bent or curved portion.

Abstract: A method of manufacturing a monolithic inkjet printhead. The method may include forming on a substrate a heater for heating ink and an electrode for supplying current to the heater, forming a passage forming layer that surrounds an ink passage by applying negative-type photoresist to the substrate and patterning the same, forming a sacrificial layer having a planarized top surface in a space surrounded by the passage forming layer by repeatedly applying a positive-type photoresist to the substrate having the passage forming layer and patterning the same by photolithography at least twice, forming a nozzle layer having a nozzle by applying a negative-type photoresist to the passage forming layer and the sacrificial layer and patterning the same, etching the substrate from the bottom surface thereof to be perforated and forming an ink supply hole, and removing the sacrificial layer.

Abstract: A method of fabricating an ink jet head having a metal chamber layer includes preparing a substrate having pressure-generating elements to generate pressure to eject ink ejection. The metal chamber layer to define sidewalls of an ink flow path is then formed on the substrate. A sacrificial layer is formed to fill a region where the ink flow path is to be formed between the sidewalls defined by the metal chamber layer. A nozzle layer having nozzles corresponding to the pressure-generating elements is formed on the metal chamber layer and the sacrificial layer.