Abstract: An inkjet print head with a high efficiency heater includes a substrate having an ink-feed hole extending therethrough to receive ink stored in a cartridge, a flow path layer to define an ink chamber in fluid communication with the ink-feed hole, a nozzle plate having a nozzle to discharge the ink from the ink chamber to an exterior, a heater located adjacent to an inner wall of the ink chamber and disposed in contact with the ink in the ink chamber, and a lead electrically connected to the heater. The heater increases thermal efficiency and maintains a stable structure. In addition, since the heater is disposed adjacent to the inner wall of the ink chamber, the heater is barely affected by the ink supply pressure or the cavitation force that results from ink bubbles shrinking.

Abstract: A method of fabricating an inkjet print head including forming an energy-generating element to eject ink on a substrate. A chamber layer and a nozzle layer having a nozzle corresponding to the energy-generating element are formed on the substrate. At least one layer of the chamber layer and the nozzle layer is formed using a photo-curable resin composition containing a photo-radical generator, an epoxy resin curable by reaction with a radical, and a non-photo reactive solvent.

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: 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 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.