Abstract: The present invention provides a method for manufacturing an ink jet recording head utilizing ink bubbling by heating of an exothermic resistor to thereby eject ink and a method manufacturing the same, including the steps of: preparing a substrate provided with the exothermic resistor; applying such first resin on the substrate as to provide a first mold shape for forming the nozzle channel and the movable member; forming the first mold shape using the first resin; applying, on the substrate, second resin over the first mold shape for forming the nozzle channel and the movable member; and removing the first mold shape. By this method, the movable member is formed in the nozzle channel between the ink inlet and the exothermic resistor to thereby provide a high-density, high-accuracy ink jet recording head which can improve a frequency response while maintaining proper discharge performance.

Abstract: A method for manufacturing a microstructure comprises the steps of forming positive type resist layer (PMMA) on a base plate having heater formed thereon; forming positive type resist layer (PMIPK) on the aforesaid positive type resist layer; exposing the positive type resist layer on the upper layer to ionizing radiation of the wavelength region that gives decomposition reaction to the positive type resist layer (PMIPK) for the formation of a designated pattern by development; exposing the positive type resist layer on the lower layer to ionizing radiation of the wavelength region that givens decomposition reaction to the positive type resist layer (PMMA) for the formation of a designated pattern by development; and coating photosensitive resin film having adhesive property on the resist pattern formed by the positive type resist layer (PMMA) and positive type resist layer (PMIPK); and then, dissolving the resist pattern to be removed after the resin film having adhesive property is hardened.

Abstract: A method for manufacturing a microstructure comprises the steps of forming positive type resist layer (PMMA) on a base plate having heater formed thereon; forming positive type resist layer (PMIPK) on the aforesaid positive type resist layer; exposing the positive type resist layer on the upper layer to ionizing radiation of the wavelength region that gives decomposition reaction to the positive type resist layer (PMIPK) for the formation of a designated pattern by development; exposing the positive type resist layer on the lower layer to ionizing radiation of the wavelength region that givens decomposition reaction to the positive type resist layer (PMMA) for the formation of a designated pattern by development; and coating photosensitive resin film having adhesive property on the resist pattern formed by the positive type resist layer (PMMA) and positive type resist layer (PMIPK); and then, dissolving the resist pattern to be removed after the resin film having adhesive property is hardened.

Abstract: A method of manufacturing an ink jet head having a substrate that has a plurality of energy generating elements used for generating energy that in turn is used to discharge ink. The substrate has recessed portions separating the energy generating elements, and a wall member is provided having depending flow passage walls which are joined respectively to the recessed portions. The energy generating elements act on the ink and discharge it through the flow passages.

Abstract: The present invention provides a dispersible colorant having a sufficiently high dispersion stability with a high functional group density on the surface and a resin component present on the surface, the resin component not separating from the surface, and a method for simply producing the same. The present invention also provides an aqueous ink containing the excellent, dispersible colorant, ink tank, ink jet recorder, ink jet recording method and inkjet recorded images. The dispersible colorant comprises a colorant and chargeable resin pseudo fine particles having a smaller size than the colorant, and the colorant and particles are fixed to each other.

Abstract: The present invention provides a dispersible colorant having a sufficiently high dispersion stability with a high functional group density on the surface and a resin component present on the surface, the resin component not separating from the surface, and a method for simply producing the same. The present invention also provides an aqueous ink containing the excellent, dispersible colorant, ink tank, ink jet recorder, ink jet recording method and inkjet recorded images. The dispersible colorant comprises a colorant and chargeable resin pseudo fine particles having a smaller size than the colorant, and the colorant and particles are fixed to each other.

Abstract: A method for manufacturing an ink jet head by bonding with liquid-like adhesive a member at least having a discharge port for discharging ink, and a substrate having energy generating elements to generate energy for discharging ink comprises the steps of coating the liquid-like adhesive on the member or the substrate, the liquid-like adhesive containing at least ultraviolet curing cation polymeric starter and epoxy resin; irradiating ultraviolet rays to the liquid-like adhesive to activate the ultraviolet curing cation polymeric starter; positioning the member and the substrate without heating process; and heating in a state of the member and the substrate being positioned to cure the activated liquid-like adhesive.

Abstract: A method for producing a liquid discharge head provided with a head main body including plural energy generating elements for generating energy for discharging liquid as a flying liquid droplet, and plural liquid paths in which the energy generating elements are respectively provided, and an orifice plate adjoined to the head main body and provided with plural discharge ports respectively communicating with the liquid paths and plural independent projections formed around the discharge ports and respectively corresponding to the discharge ports so as to enter into the liquid paths and to engage therewith. The method includes steps of forming the plural projections and the discharge ports while a continuous resinous film is transported; separating the film in a continuous manner in a predetermined size including the portion on which the discharge ports are formed, thereby preparing the orifice plate; and adjoining the orifice plate to the head main body.

Abstract: The present invention provides a method for manufacturing an ink jet recording head utilizing ink bubbling by heating of an exothermic resistor to thereby eject ink and a method manufacturing the same, including the steps of: preparing a substrate provided with the exothermic resistor; applying such first resin on the substrate as to provide a first mold shape for forming the nozzle channel and the movable member; forming the first mold shape using the first resin; applying, on the substrate, second resin over the first mold shape for forming the nozzle channel and the movable member; and removing the first mold shape. By this method, the movable member is formed in the nozzle channel between the ink inlet and the exothermic resistor to thereby provide a high-density, high-accuracy ink jet recording head which can improve a frequency response while maintaining proper discharge performance.

Abstract: The present invention provides a method for manufacturing an ink jet recording head utilizing ink bubbling by heating of an exothermic resistor to thereby eject ink and a method manufacturing the same, including the steps of: preparing a substrate provided with the exothermic resistor; applying such first resin on the substrate as to provide a first mold shape for forming the nozzle channel and the movable member; forming the first mold shape using the first resin; applying, on the substrate, second resin over the first mold shape for forming the nozzle channel and the movable member; and removing the first mold shape. By this method, the movable member is formed in the nozzle channel between the ink inlet and the exothermic resistor to thereby provide a high-density, high-accuracy ink jet recording head which can improve a frequency response while maintaining proper discharge performance.

Abstract: A liquid discharge head having plural liquid paths and plural discharge openings is formed by joining an adhesion face of an orifice plate with an adhesion face of a head main body—The liquid paths are formed upon joining an element substrate and a ceiling substrate which comprise the head main body. Apertures of the liquid paths are provided in the adhesion face of the head main body, and a protruding portion is provided in the adhesion face of the orifice plate. The protruding portion has a shape corresponding to the cross-sectional shape of one of the liquid paths, and one of the discharge openings is provided in the protruding portion. The protruding portion or a part thereof fits into one of the liquid paths, and is inserted into the liquid path for joining the adhesion face of the orifice plate with the adhesion face of the head main body.

Abstract: A method of manufacturing a liquid discharge head having an opening for discharging liquid droplets, a wall member constituting a liquid flow path to the opening, a substrate provided with and for creating a bubble in the liquid, and a movable member supported by and fixed to the substrate with the discharge opening side thereof as a free end displaced away from the substrate by pressure produced by creating the bubble to thereby direct the pressure to the discharge opening side including the steps of preparing the substrate and movable member, filling the gap between the movable member and the substrate with a liquid photo-curing resin, spin coating the resin until the resin covers the movable member, exposing an area of the resin to light to harden a portion corresponding to the wall member, and removing the unexposed portion of the photo-curing resin.

Abstract: The invention provides a method for producing a liquid discharge head including a head main body provided with plural energy generation elements for generating energy for discharging liquid as a flying liquid droplet and plural flow paths in which the energy generation elements are respectively provided, and an orifice plate provided with plural discharge ports respectively communicating with the flow paths, wherein the orifice plate and the head main body are mutually adjoined, the method comprising a step of preparing a substrate consisting of a silicon-containing material for preparing the orifice plate a step of forming, by dry etching, plural recesses in positions on the surface of the substrate respectively corresponding to the discharge ports, with a depth larger by 5 to 50 &mgr;m than the depth of the discharge ports, a step of thinning the substrate from the reverse side thereof until the depth of the recesses becomes equal to the depth of the discharge apertures to form plural discharge ports on the

Abstract: A liquid discharge head having plural liquid paths and plural discharge openings is formed by joining an adhesion face of an orifice plate with an adhesion face of a head main body. The liquid paths are provided in the head main body, and the adhesion face of the head main body has apertures of the liquid paths. The adhesion face of the orifice plate has recessed portions and protruding portions. The protruding portions have a shape corresponding to the cross-sectional shape of the liquid paths, and the discharge openings are provided in the protruding portions. The protruding portions or parts thereof fit into the liquid paths, and are inserted into the liquid paths for joining the adhesion face of the orifice plate with the adhesion face of the head main body.

Abstract: The present invention provides a method for manufacturing an ink jet recording head utilizing ink bubbling by heating of an exothermic resistor to thereby eject ink and a method manufacturing the same, including the steps of: preparing a substrate provided with the exothermic resistor; applying such first resin on the substrate as to provide a first mold shape for forming the nozzle channel and the movable member; forming the first mold shape using the first resin; applying, on the substrate, second resin over the first mold shape for forming the nozzle channel and the movable member; and removing the first mold shape. By this method, the movable member is formed in the nozzle channel between the ink inlet and the exothermic resistor to thereby provide a high-density, high-accuracy ink jet recording head which can improve a frequency response while maintaining proper discharge performance.

Abstract: This invention provides a liquid discharge head including an orifice plate having plural discharge openings for discharging liquid droplets, and a head main body provided with plural liquid paths for respectively communicating with the plural discharge openings, a liquid chamber for liquid supply to the plural liquid paths, a supply aperture for liquid supply to the liquid chamber, and plural energy generating elements provided corresponding to the plural liquid paths and adapted to generate energy for discharging the liquid droplet, and formed by adjoining the orifice plate with an adhesion face of the head main body on which formed are the apertures of the liquid paths for communicating with the discharge openings of the orifice plate, wherein the orifice plate comprises a recessed portion and a protruding portion on the adhesion face with the head main body, and the protruding portion has a shape corresponding to the cross-sectional shape of the liquid path and is provided the discharge opening therein, an

Abstract: In a liquid discharge head having a head body provided with an orifice plate having a plurality of discharge ports for discharging liquid droplets therefrom, a plurality of flow paths communicating with respective ones of the plurality of discharge ports, a liquid chamber for supplying liquid to the plurality of flow paths, and a plurality of energy generating elements disposed correspondingly to the plurality of flow paths and generating energy for discharging the liquid droplets, the orifice plate being joined to the joined surface of the head body in which the communication ports of the flow paths communicating with the discharge ports of the orifice plate are disposed, the orifice plate comprises a first member providing the core of the orifice plate and formed with apertures layer than the discharge ports at locations whereat the discharge ports are formed, and a second member covering the both surfaces of the first member and the inner surfaces of the apertures.

Abstract: A liquid ejection head has a plurality of heaters for generating energy for ejecting ink droplets and an element substrate to which the plurality of heaters are disposed. Further, the liquid ejection head has an orifice forming member laminated on the main surface of the element substrate and including a plurality of nozzles each having an ejection port for ejecting liquid droplets, a bubble forming chamber in which bubbles are formed by an ejection energy generation element, and a supply path for supplying a liquid to the bubble forming chamber, and a supply chamber for supplying the liquid to the plurality of nozzles. Then, the orifice forming member has a portion that is located in the vicinity of the heater on the supply path side where the height of the nozzle to the main surface of the element substrate is minimized, thereby the height of the nozzle changes toward the supply chamber.

Abstract: A method for manufacturing a microstructure comprises the steps of forming positive type resist layer (PMMA) on a base plate having heater formed thereon; forming positive type resist layer (PMIPK) on the aforesaid positive type resist layer; exposing the positive type resist layer on the upper layer to ionizing radiation of the wavelength region that gives decomposition reaction to the positive type resist layer (PMIPK) for the formation of a designated pattern by development; exposing the positive type resist layer on the lower layer to ionizing radiation of the wavelength region that givens decomposition reaction to the positive type resist layer (PMMA) for the formation of a designated pattern by development; and coating photosensitive resin film having adhesive property on the resist pattern formed by the positive type resist layer (PMMA) and positive type resist layer (PMIPK); and then, dissolving the resist pattern to be removed after the resin film having adhesive property is hardened.

Abstract: A liquid jet recording method includes applying thermal energy to liquid in a liquid passage to produce film boiling of the liquid to produce a. bubble; permitting the bubble to communicate with ambience; wherein the liquid passage is not blocked in the communicating step.