Abstract: A method for manufacturing an ink jet recording head comprising: (a) a process of forming a positive resist layer (I) made of a photodegradation positive resist (i) on a surface of a substrate having an energy generation element; (b) a process of removing a predetermined area of the positive resist layer (I) by photolithography to form a micro structure which becomes at least an ink flow path; (c) a process of forming a coating resin layer on the surface of the substrate on which the micro structure has been formed; (d) a process of forming ink discharge ports in a portion where the coating resin layer covers the micro structure by photolithography; and (e) a process of removing the micro structure to form the ink flow path communicated with the ink discharge ports, wherein the photodegradation positive resist (i) includes a polymer having a glutarimide structure shown by the following chemical formula (1) in a molecule; wherein R1 designates a hydrogen atom or an alkyl group, an allyl group, or an aralky

Abstract: To provide a positive type photosensitive resin composition, containing at least an acrylic resin having a carboxylic anhydride structure in a molecule, and a compound that generates an acid when irradiated with light.

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: A photosensitive resin composition usable in forming an ink-jet recording head, and a production method of the head. The composition comprises a polyetheramide resin having a repeating unit represented by the following formula (1), a compound that generates an acid by light irradiation, and a crosslinking agent for the polyetheramide resin which acts under acidic conditions.

Abstract: The present invention provides a method for manufacturing a high quality ink jet head, and an ink jet head manufactured by such a method, in which, in a case where a coating resin layer constituting ink flow path walls is formed, even when a solvent having a strong dissolving force is used, it is not feared that a configuration of an ink flow path pattern is distorted. In the method, a photosensitive resin composition layer in which an inter-molecule bridging reaction proceeds by irradiation of an ionization radiant ray having a first wavelength band and a molecule decaying reaction of main chain decomposing type of the resin proceeds by irradiation of an ionization radiant ray having a second wavelength band different from the first wavelength band is formed on a substrate on which energy generating elements were provided. Thereafter, an ink flow path pattern is formed by the irradiation of the ionization radiant ray having the first wavelength band and a developing process.

Abstract: A seam welding apparatus enables, even when metallic sheets are arranged in a line in a short distance, the welding electrodes to come into contact only with the metallic sheet to be welded, so as to provide a reliable welding of the metallic sheets to form connected portions having high strength. The roller electrode 20, which has on its outer peripheral portion the conical electrode surface 21, is supported by the central axis inclined relative to the surface of the metallic sheet 50 to be welded, and there is provided the stationary electrode 30 in which the portion including the flat electrode surface 31 has the smaller thickness. The electrode surface 21 of the roller electrode 20 is brought into contact with the surface of one of the metallic sheets 50 to be welded, while bringing the electrode surface 31 of the stationary electrode 30 into contact with the surface of the other metallic sheet 50.

Abstract: The present invention discloses a method of producing a liquid flow path shape capable of refilling ink at a high speed by optimizing a three-dimensional shape of the liquid flow path and suppressing the vibration of a meniscus and a head thereof. According to the invention, a pattern to form the liquid flow path to be formed on a substrate with a heater is formed by a positive photosensitive material in a two-layered structure of upper and lower layers, and the lower layer is used for forming the liquid flow path after being thermally crosslinked.

Abstract: A seam welding apparatus enables, even when metallic sheets are arranged in a line in a short distance, the welding electrodes to come into contact only with the metallic sheet to be welded, so as to provide a reliable welding of the metallic sheets to form connected portions having high strength. The roller electrode 20, which has on its outer peripheral portion the conical electrode surface 21, is supported by the central axis inclined relative to the surface of the metallic sheet 50 to be welded, and there is provided the stationary electrode 30 in which the portion including the flat electrode surface 31 has the smaller thickness. The electrode surface 21 of the roller electrode 20 is brought into contact with the surface of one of the metallic sheets 50 to be welded, while bringing the electrode surface 31 of the stationary electrode 30 into contact with the surface of the other metallic sheet 50.

Abstract: A photosensitive resin composition usable in forming an ink-jet recording head, and a production method of the head. The composition comprises a polyetheramide resin having a repeating unit represented by the following formula (1), a compound that generates an acid by light irradiation, and a crosslinking agent for the polyetheramide resin which acts under acidic conditions. The composition improves adhesion between a substrate and an ink flow path forming member which constitute the ink-jet recording head.

Abstract: A method for manufacturing an ink jet recording head comprising: (a) a process of forming a positive resist layer (I) made of a photodegradation positive resist (i) on a surface of a substrate having an energy generation element; (b) a process of removing a predetermined area of the positive resist layer (I) by photolithography to form a micro structure which becomes at least an ink flow path; (c) a process of forming a coating resin layer on the surface of the substrate on which the micro structure has been formed; (d) a process of forming ink discharge ports in a portion where the coating resin layer covers the micro structure by photolithography; and (e) a process of removing the micro structure to form the ink flow path communicated with the ink discharge ports, wherein the photodegradation positive resist (i) includes a polymer having a glutarimide structure shown by the following chemical formula (1) in a molecule; wherein R1 designates a hydrogen atom or an alkyl group, an allyl group, or an aralk

Abstract: The present invention discloses a method of producing a liquid flow path shape capable of refilling ink at a high speed by optimizing a three-dimensional shape of the liquid flow path and suppressing the vibration of a meniscus and a head thereof. According to the invention, a pattern to form the liquid flow path to be formed on a substrate with a heater is formed by a positive photosensitive material in a two-layered structure of upper and lower layers, and the lower layer is used for forming the liquid flow path after being thermally crosslinked.

Abstract: The invention is to provide a method for producing a fine structured member and a fine hollow structure, useful for producing a liquid discharge head which is inexpensive, precise and highly reliable, also to provide a method for producing a liquid discharge head utilizing such producing method for the fine structured member and the fine hollow structure and a liquid discharge head obtained by such producing method.

Abstract: An optical element comprising at least a plurality of pixels formed on a substrate and partition walls arranged respectively between adjacent pixels is manufactured by a method comprising steps of forming partition walls of a resin composition on a substrate, performing a dry etching process of irradiating the substrate carrying the partition walls formed thereon with plasma in an atmosphere containing gas selected at least from oxygen, argon and helium, performing a plasma treatment process of irradiating the substrate subjected to the dry etching process with plasma in an atmosphere containing at least fluorine atoms, and forming pixels by applying ink to the areas surrounding by the partition walls by means of an ink-jet system.

Abstract: Provided is a color filter which comprises a substrate and a resin layer on the substrate, the resin layer containing a plurality of colored portions of different colors and non-colored portions.

Abstract: An optical element comprising at least a plurality of pixels formed on a substrate and partition walls arranged respectively between adjacent pixels is manufactured by a method comprising steps of forming partition walls of a resin composition on a substrate, performing a dry etching process by irradiating the substrate carrying the partition walls formed thereon with plasma in an atmosphere containing gas selected from oxygen, argon and helium, performing a plasma treatment process by irradiating the substrate subjected to the dry etching process with plasma in an atmosphere containing at least fluorine atoms, and forming pixels by applying ink to the areas surrounded by the partition walls by means of an ink-jet system.

Abstract: A liquid jet printing head includes a discharging outlet for discharging printing liquid, an energy generating element capable of generating an energy for discharging said liquid through said discharging outlet and a discharging outlet face at which said discharging outlet is arranged, characterized in that said discharging outlet face has a water repellent material layer comprising fine particles of an inorganic material distributed in a water repellent resin in a desired distribution state. A liquid jet printing apparatus provided with said liquid jet printing head.

Abstract: An optical element comprising at least a plurality of pixels formed on a substrate and partition walls arranged respectively between adjacent pixels is manufactured by a method comprising steps of forming partition walls of a resin composition on a substrate, performing a dry etching process of irradiating the substrate carrying the partition walls formed thereon with plasma in an atmosphere containing gas selected at least from oxygen, argon and helium, performing a plasma treatment process of irradiating the substrate subjected to the dry etching process with plasma in an atmosphere containing at least fluorine atoms, and forming pixels by applying ink to the areas surrounding by the partition walls by means of an ink-jet system.

Abstract: A color filter comprising a substrate, a shielding layer formed on the substrate and having an opening, color mixing prevention barriers formed on the shielding layer, and colored portions formed between the color mixing prevention barriers, the optical density of the colorants in the colored portions being raised toward the substrate.

Abstract: A liquid jet printing head includes a discharging outlet for discharging printing liquid, an energy generating element capable of generating an energy for discharging the liquid through the discharging outlet and a discharging outlet face at which the discharging outlet is arranged, characterized in that the discharging outlet face has a water repellent material layer with fine particles of an inorganic material distributed in a water repellent resin in a desired distribution state. A liquid jet printing apparatus is provided with the liquid jet printing head. The liquid jet printing head enables one to always perform stable ink discharging thereby providing high quality printed images.