Abstract: A positive type photosensitive resin composition comprises a polyacrylate resin having, in the structure, at least a structural unit represented by the following general formula (1): wherein X represents a hydroxyl group, an alkylol group having 2 to 4 carbon atoms, or a methylolamino group; R1 and R2 independently represents a hydrogen atom, or an alkyl group having 1 to 3 carbon atoms; R3 represents an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, or an aralkyl group having an aryl group or alkyl group with 1 to 2 carbon atoms; n represents a positive integer; and m represents 0 or a positive integer, and a condensable crosslinker.

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. A positive-working photosensitive material, including a ternary polymer containing an acrylate ester as a principal component, acrylic acid for thermal crosslinking and a monomer unit for expanding a sensitivity region, is used as a material for forming the Line structured member.

Abstract: A cationic photopolymerizable epoxy resin composition includes an epoxy resin, a cationic photopolymerization initiator, an inhibitor of cationic polymerization and a compound that has a fluoroalkyl group and also has a substituent at its terminal, with the substituent being allowed to cross-link react with the epoxy group of the epoxy resin. The cationic photopolymerizable epoxy resin composition further includes a thermal cationic polymerization catalyst.

Abstract: A method of manufacturing an ink jet head, which includes a discharge port for discharging an ink droplet, an ink flow path communicated with the discharge port, and an energy generating element for discharging the ink droplet from the discharge port, includes providing a photodegradable resin layer on a substrate having the energy generating element, forming a structure which becomes the ink flow path by exposing and developing the photodegradable resin layer, coating the substrate having the structure which becomes the ink flow path with a negative type photosensitive resin layer, forming the ink discharge port in the negative type photosensitive resin layer, and forming the ink flow path communicated with the discharge port by removing the structure which becomes the ink flow path. The photodegradable resin layer includes a binary acrylic copolymer composition, which contains a unit obtained from (meta)acrylic ester as a main component and further contains a unit obtained from (meta)acrylic acid.

Abstract: The present invention provides a method for manufacturing a high quality ink jet head 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 liquid discharge head having a substrate provided with energy generating elements for generating energy to discharge a liquid, discharge portions including discharge ports for discharging the liquid, and flow paths supplying the liquid to the discharge portions and a method for its manufacture are provided. The method includes the steps of forming a layer of a negative type photosensitive resin on the substrate, and exposing the layer to light having a wavelength of 365 nm to form the discharge portions.

Abstract: A method for manufacturing a liquid discharge head including an energy generating element, which generates energy utilized for discharging a liquid, and a discharge portion provided at a position facing the energy generating element and having a discharge port for discharging the liquid is provided. This method includes the steps of forming a negative photosensitive resin layer used for a member that forms the discharge port on the substrate, and exposing the layer to an i-line to form the discharge portion that is tapered in a direction from the substrate to the discharge port, wherein the layer has an absorbance per 1 ?m thickness of about 0.02 to about 0.07 for light used for the exposure.

Abstract: A cationic photopolymerizable epoxy resin composition includes an epoxy resin, a cationic photopolymerization initiator, an inhibitor of cationic polymerization and a compound that has a fluoroalkyl group and also has a substituent at its terminal, with the substituent being allowed to cross-link react with the epoxy group of the epoxy resin. The cationic photopolymerizable epoxy resin composition further includes a thermal cationic polymerization catalyst.

Abstract: A method of manufacturing an ink jet head which includes a discharge port for discharging an ink droplet, an ink flow path communicated with the discharge port, and an energy generating element for discharging the ink droplet from the discharge port, the method for manufacturing an ink jet head includes a process of forming a photodegradable positive type resist layer on a substrate having the energy generating element, a process of forming a structure which becomes the ink flow path by exposing and developing the photodegradable positive type resist layer, a process of coating the substrate having the structure which becomes the ink flow path with a negative type resist layer, a process of forming the ink discharge port in the negative type resist layer, and a process of forming the ink flow path communicated with the discharge port by removing the structure which becomes the ink flow path, wherein the photodegradable positive type resist layer includes an acrylic copolymer composition, the acrylic copolymer

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 positive type photosensitive resin composition comprises a polyacrylate resin having, in the structure, at least a structural unit represented by the following general formula (1): wherein X represents a hydroxyl group, an alkylol group having 2 to 4 carbon atoms, or a methylolamino group; R1 and R2 independently represents a hydrogen atom, or an alkyl group having 1 to 3 carbon atoms; R3 represents an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, or an aralkyl group having an aryl group or alkyl group with 1 to 2 carbon atoms; n represents a positive integer; and m represents 0 or a positive integer, and a condensable crosslinker.

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: 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 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