Abstract: The ink jet head producing method includes: forming a first flow path forming member in a portion constituting a flow path side wall, which constitutes at least a partitioning portion between flow paths on a substrate; forming a pattern as a mold for the flow path; wherein the pattern is formed over the substrate and a portion of the first flow path forming member, constituting a flow path side wall, and a portion constituting the flow path side wall is covered with the pattern and another portion is not covered with the pattern; forming a second flow path forming member on the first flow path forming member and the pattern; wherein the second flow path forming member is formed by a material corresponding to the first flow path forming member; forming the discharge port in the second flow path forming member; and forming the flow path by removing the pattern.

Abstract: According to the present invention, a method for manufacturing a liquid discharge head includes the steps of depositing a solid layer for forming a flow path on a substrate on which an energy generating element is arranged to generate energy that is used to discharge liquid, forming, on the substrate where the solid layer is mounted, a coating layer for coating the solid layer, forming a discharge port used to discharge a liquid, through a photolithographic process, in the coating layer formed on the solid layer, and removing the solid layer to form a flow path that communicates with the energy element and the discharge port, whereby a material used for the coating layer contains a cationically polymerizable chemical compound, cationic photopolymerization initiator and a inhibitor of cationic photopolymerization, and whereby a material of the solid layer that forms a boundary with a portion where the discharge port of the coating layer is formed contains a copolymer of methacrylic anhydride and methacrylate e

Abstract: A liquid discharge head includes a substrate having an energy generating element configured to generate energy required to discharge liquid, a discharge port configured to discharge the liquid and provided in an opposed relationship to the energy generating element, a wall member defining a chamber adapted to store the energy required to discharge liquid the energy being generated by the energy generating element, a discharge portion defining a fluid path connecting the chamber and the discharge port, a supply path facilitating supplying the liquid into the chamber, and a pair of hollow portions provided in the wall member, wherein the hollow portions oppose each other and sandwich at least the entire discharge port in a direction from the discharge port to the substrate, and the hollow portions are independent of the chamber.

Abstract: A method for manufacturing a minute structure comprises a step of forming an ionizing radiation decomposing type positive type resist layer including a methyl isopropenyl ketone as a first positive type photosensitive material layer, a step of forming an ionizing radiation decomposing type positive type resist layer including a photosensitive material of a copolymer as a second positive type photosensitive material layer to be sensitized by an ionizing radiation of a second wavelength range on the first positive type photosensitive material layer, a step of forming a desired pattern in the above-mentioned second positive type photosensitive material layer, and development using a developing solution, and then, a step of forming a desired pattern in the above-mentioned first positive type photosensitive material layer to form a convex shape pattern.

Abstract: According to the present invention, a method for manufacturing a liquid discharge head includes the steps of: forming a solid layer for forming a flow path on a substrate on which an energy generating element is arranged to generate energy that is used to discharge liquid; forming, on the substrate where the solid layer is mounted, a coating layer for coating the solid layer; forming a discharge port used to discharge a liquid, through a photolithographic process, in the coating layer deposited on the solid layer; and removing the solid layer to form a flow path that communicates with the energy element and the discharge port, whereby a material used for the coating layer contains a cationically polymerizable chemical compound, cationic photopolymerization initiator and an inhibitor of cationic photopolymerization, and whereby a material of the solid layer that forms a boundary with a portion where the discharge port of the coating layer are formed contains a copolymer of methacrylic acid and methacrylate est

Abstract: The present invention provides an ink jet recording head forming method which can be improved in a discharging characteristic. The method includes at least the step of forming an ink flow path pattern on a substrate by a photodecomposable positive type resist resin, the step of once executing each of the steps of applying, exposing and baking thereon a nozzle-constituting resin layer which is a negative type resist containing an optical cation polymerization starting agent and having an epoxy resin as a chief component with respect to each of an ink flow path pattern and an ink discharge port pattern, the step of collectively developing unexposed portions on the respective nozzle-constituting resin layers, and the step of removing the formed photodecomposable resin.

Abstract: According to the present invention, there are provided an ink jet recording head capable of performing high-precision printing and recording and having a high reliability, and a method of manufacturing the head. The ink jet recording head of the present invention has: an element substrate on whose surface an ink discharge energy generating element is formed and which is made of silicon; and a thin and flat inorganic substrate in which an ink discharge port is formed in a portion disposed vertically above the ink discharge energy generating element. Furthermore, the head includes a photosensitive material layer which bonds the element substrate to the inorganic substrate and which is to constitute a wall forming an ink flow path which communicates with the ink discharge port. The inorganic substrate is laminated on the element substrate provided with the photosensitive material layer, and is thereafter provided with the ink discharge port.

Abstract: An alkylsiloxane-containing epoxy resin composition can suitably be used as water-repellent agent or a water-repellent coating to be advantageously applied to areas that are apt to be brought into contact with solutions and substances containing one or more than one components that can damage the film forming property and the adhesion of an ordinary water-repellent agent. The resin composition comprises at least an alkylsiloxane-containing epoxy resin having two or more than two alkylsiloxane groups and two or more than two cyclic aliphatic epoxy groups in a molecule and a cationic polymerization catalyst.

Abstract: An alkylsiloxane-containing epoxy resin composition can suitably be used as water-repellent agent or a water-repellent coating to be advantageously applied to areas that are apt to be brought into contact with solutions and substances containing one or more than one components that can damage the film forming property and the adhesion of an ordinary water-repellent agent. The resin composition comprises at least an alkylsiloxane-containing epoxy resin having two or more than two alkylsiloxane groups and two or more than two cyclic aliphatic epoxy groups in a molecule and a cationic polymerization catalyst.

Abstract: An alkylsiloxane-containing epoxy resin composition can suitably be used as water-repellent agent or a water-repellent coating to be advantageously applied to areas that are apt to be brought into contact with solutions and substances containing one or more than one components that can damage the film forming property and the adhesion of an ordinary water-repellent agent. The resin composition comprises at least an alkylsiloxane-containing epoxy resin having two or more than two alkylsiloxane groups and two or more than two cyclic aliphatic epoxy groups in a molecule and a cationic polymerization catalyst.

Abstract: Constituent information (information obtained by structuring a product and part into an intensive relationship) representing the association between first information (product) subjected to at least either one of valuation and determination by the user, and second information (part) which constitutes the first information is managed for each of a plurality of types of jobs (e.g., jobs such as final decision having similar or overlapping contents in a financial business) which require at least either one of valuation and determination by the user. First information about an externally designated job is created based on externally input information and the management information.

Abstract: The fluorine-containing epoxy resin composition of the present invention comprises a fluorine-containing epoxy resin having in one molecule at least one perfluoroalkyl group having 6 to 12 carbon atoms and at least two alicyclic epoxy groups, and a cationic polymerization catalyst.

Abstract: A fluorine-containing epoxy resin composition comprising a fluorine-containing aromatic epoxy resin having in one molecule at least one perfluoroalkyl group having 6 to 12 carbon atoms and preferably at least two epoxy groups, a cationic polymerization catalyst, and optionally a compatibilizing agent having an epoxy group and a fluoromethyl group is coated on discharge openings of an ink jet recording head, followed by exposure to activation energy rays in a given pattern form to form cured coatings with a desired pattern so that the discharge openings can be endowed with ink repellency.

Abstract: The fluorine-containing epoxy resin composition of the present invention comprises a fluorine-containing epoxy resin having in one molecule at least one perfluoroalkyl group having 6 to 12 carbon atoms and at least two alicyclic epoxy groups, and a cationic polymerization catalyst.

Abstract: An ink-jet head is produced by means of an etching employing a mask member which is formed without defects such as pinholes. More specifically, a polyetheramide resin layer is employed as an etching-resistance mask when processing a substrate by means of the etching, in which the polyetheramide resin layer is etched by means of an etching gas containing oxygen as main component.

Abstract: A resin composition comprising a fluorine-containing aliphatic epoxy resin having in one molecule at least one perfluoroalkyl group having 6 to 12 carbon atoms and at lest two epoxy groups, a cationic polymerization catalyst, and optionally a compatibilizing agent having an epoxy group and a fluoromethyl group is applied to a discharge opening surface of an ink jet recording head, followed by irradiation with an activation energy ray in a given pattern to form a cured film in a desired pattern, so that the discharge opening surface is endowed with ink repellency.

Abstract: A method for manufacturing an ink jet head comprises the steps of preparing a substrate for use, forming a mask layer of etching-proof material for the formation of an ink supply opening at least on one surface of the substrate, forming the hole serving as the ink supply opening by executing anisotropic etching on the substrate through the mask layer of etching-proof material, and removing by means of wet etching the eaves-like portions formed by the side etching following the anisotropic etching on the mask layer of etching-proof material on the circumference of the hole and the surface of the mask layer of etching-proof material on the substrate. With this method, it becomes possible to prevent the interior of head from being contaminated by the dust particles that may be created by the broken eaves-like portions and by the water used for dicing that may enter the interior of head in the processes subsequent to etching for head manufacture.

Abstract: An ink jet apparatus, used with an exchangeable ink jet cartridge having an ink jet head and an ink container, includes a cap, a sucking device and a controller. When the cap caps the ejection orifices of the recording head, the sucking device sucks ink from the ejection orifices. The controller controls the operation of the cap and sucking device. After a sucking operation is performed, the cap is held away from the ejection orifices for a predetermined duration of time; the capping and sucking operations are then repeated.

Abstract: There is disclosed an ink jet head comprising plural discharge energy generating elements for generating energy to be used for discharging ink droplets, ink discharge openings for discharging the ink droplets, a substrate bearing thereon an array of the plural discharge energy generating elements and an ink supply aperture consisting of a penetrating hole extending along the direction of array of the discharge energy generating elements, and an orifice plate provided with the ink discharge openings, in which the substrate and the orifice plate are mutually adjoined to define therebetween ink paths connecting the ink discharge openings and the ink supply aperture, wherein the orifice plate comprises plural projections in a position corresponding to the ink supply aperture.

Abstract: A recording apparatus which is provided with a plurality of heads accompanied with temperature rise in recording by the application of driving signals comprises means for detecting the temperature in apparatus to detect temperatures in the recording apparatus; means for obtaining the temperature of the recording head from an offset value set between the temperature in apparatus and the temperature of the recording head of the recording apparatus in accordance with the detection by the aforesaid means for detecting the temperature in apparatus; and means for controlling the driving signal to change the waveforms of the driving signal applied to the recording head.