Abstract: A magneto-optic recording medium in which information is reproduced while a recording magnetic domain is enlarged by displacing a domain wall based on a temperature distribution formed by a beam of light and having a maximum temperature Tr. The recording medium comprises a reproducing layer in which a domain wall is displaced, a recording layer for holding a recording magnetic domain corresponding to information, and a cutoff layer disposed between the reproducing layer and the recording layer and having a Curie temperature lower than those of the reproducing layer and recording layer.

Abstract: A magnetooptical recording medium includes a first magnetic layer, a second magnetic layer whose Curie temperature is lower than that of the first magnetic laye, and a third magnetic layer, comprising a vertically-magnetizing film, whose Curie temperature is higher than that of the second magnetic layer. The first magnetic layer, the second magnetic layer and the third magnetic layer are in a state of exchange coupling with each other at a portion of a vertically-magnetizing film. A domain walls formed in the first magnetic layer moves when the temperature of the medium has been raised to at least the Curie temperature of the second magnetic layer.

Abstract: A magnetooptical recording medium includes a first magnetic layer, a second magnetic layer whose Curie temperature is lower than that of the first magnetic layer, and a third magnetic layer, comprising a vertically-magnetizing film, whose Curie temperature is higher than that of the second magnetic layer. The first magnetic layer, the second magnetic layer and the third magnetic layer are in a state of exchange coupling with each other at a portion of a vertically-magnetizing film. A domain walls formed in the first magnetic layer moves when the temperature of the medium has been raised to at least the Curie temperature of the second magnetic layer.

Abstract: A method of producing a micro structure on a substrate which has a support portion and a plate-like portion supported thereby at a distance from the substrate, comprising the steps of forming a spacer layer consisting of an insulating material on a substrate having an electrically conductive layer formed on its surface, forming a latent image layer consisting of an electrically conductive material on the spacer layer at a site where the plate-like portion of an intended structure is to be formed, producing an aperture, where a part of the electrically conductive layer is exposed, on the spacer layer at a site where the supporting portion of an intended structure is to be formed, forming a structure layer consisting of plating film inside of the aperture and on the latent image layer by electroplating the electrically conductive layer as a cathode, and removing the spacer layer.

Abstract: A method for manufacturing liquid discharge heads is provided with discharge ports for discharging liquid, liquid flow paths communicated with the discharge ports for supplying liquid to the discharge ports, a substrate having heat generating members for creating bubbles in liquid, and movable members facing the heat generating members, each being arranged in each liquid flow path, having the free end on the discharge port side with a specific gap with the heat generating member. This method comprises the steps of forming the boundary layer used for providing a gap between the movable member and the substrate above the heat generating member on the substrate, of laminating the movable member on the boundary layer so as to position the free end above the heat generating member, at the same time fixing the movable member on the substrate, and of forming the gap between the movable member and the heat generating member by use of the boundary layer.

Abstract: A liquid discharging head comprises a discharging port for discharging liquid, a liquid flow path communicated with said discharging port, a bubble generating region for causing the liquid to generate a bubble and a movable member having provided thereon a free end disposed facing to said bubble generating region, and on the downstream of said liquid flow path directed toward said discharging port. At least when said movable member is in stationary state, a side of said liquid flow path corresponding to said bubble generating region is substantially composed of all with a wall face and common communicating space for commonly communicating said liquid flow path with a neighboring liquid flow path is provided in the upward of a movable section of said movable member.

Abstract: The present invention provides a method for manufacturing a liquid discharge head comprising a top plate including a plurality of ink discharge ports for discharging ink droplet, a plurality of first liquid passages for supplying ink in correspondence to the plurality of ink discharge ports and a common liquid chamber for supplying the ink to the first liquid passages, a liquid discharge head substrate obtained by forming second liquid passages arranged adjacent to the first liquid passages and including bubble generating areas on a substrate on which a plurality of heat generating elements for causing the ink discharge port to discharge the ink droplets and including drivers for driving the heat generating elements, and a movable diaphragm for completely isolating the first liquid passages and the second liquid passages from each other and displaceable by a bubble generated on the heat generating element, wherein the method comprises a movable diaphragm forming step for providing the movable diaphragm in suc

Abstract: A method of producing a micro structure on a substrate which has a support portion and a plate-like portion supported thereby at a distance from the substrate, comprising the steps of forming a spacer layer consisting of an insulating material on a substrate having an electrically conductive layer formed on its surface, forming a latent image layer consisting of an electrically conductive material on the spacer layer at a site where the plate-like portion of an intended structure is to be formed, producing an aperture, where a part of the electrically conductive layer is exposed, on the spacer layer at a site where the supporting portion of an intended structure is to be formed, forming a structure layer consisting of plating film inside of the aperture and on the latent image layer by electroplating the electrically conductive layer as a cathode, and removing the spacer layer.

Abstract: A method for manufacturing ink jet recording heads includes the steps of forming a film of a first inorganic material in the form of ink flow path pattern using a soluble first inorganic material on the substrate having ink-discharge, pressure-generating elements formed thereon, forming a film of a second inorganic material becoming ink flow walls on the film of the first inorganic material using the second inorganic material, forming ink-discharge openings on the film of the second inorganic material above the ink-discharge, pressure-generating elements, and eluting the film of the first inorganic material.

Abstract: In order to avoid damages or deformations of eject energy generating elements formed on a substrate or a grooved plate, when the substrate and the grooved plate are joined, a liquid eject head for an image forming apparatus comprises as follows is proposed: the substrate having electro-thermal energy conversion elements thereon, the grooved plate where grooves are formed at corresponding positions to the above-mentioned electro-thermal energy conversion elements and eject ports communicated to the respective grooves are formed, wherein liquid paths communicated to the above-mentioned eject ports are formed so as to form the liquid eject head where liquid droplets are ejected from the above-mentioned liquid paths wherein; at least two protrusions formed on the substrate apart from each other and corresponding engaging recessed portions formed on the grooved plate for engaging with the above-mentioned protrusions, wherein; a height from the surface of the substrate to upper ends of the above-mentioned protrusio

Abstract: A liquid ejection head having a plurality of ejection outlets for ejecting liquid; a first substrate and a second substrate for constituting a plurality of liquid flow paths in fluid communication with the ejection outlets, respectively when combined with each other; a plurality of energy conversion elements disposed in the liquid flow paths, respectively to convert electrical energy to ejection energy for the liquid in the liquid flow paths; a plurality of elements or electric circuits having different functions for controlling driving conditions of the energy conversion elements; wherein the elements and electric circuits are provided either on the first substrate or the second substrate, depending on their functions.

Abstract: A method of producing an ink jet head valve for an ink jet head having a discharge port for discharging ink, an ink flow path communicated with said discharge port and an electrothermal converting member used as an energy generating means for discharging ink into said ink flow path, comprises the step of producing said ink jet head valve by a metal CVD process.

Abstract: An ink jet printing head in which nozzles and a liquid chamber are formed by adhering a first substrate on which plural walls are formed and a second substrate in mutually opposed manner. The plural walls formed on the first substrate and to be adhered to the second substrate are arranged by the combination of walls of a substantially same width, and the walls are provided with an adhesive layer on the adhering faces thereof and integrally adhered to the second substrate.

Abstract: A method for manufacturing a liquid jet recording head having an element substrate provided with a plurality of discharge energy generating elements for applying discharging energy to a recording liquid in accordance with image data, a liquid chamber for storing the recording liquid, and a top plate having a plurality of nozzles, is provided. The method includes a step of forming, on an anisotropic-etching mask layer provided on a nozzle surface of the top plate, compensation patterns extending to a liquid chamber region in order to form the nozzles and the liquid chamber by anisotropic etching, and a step of performing anisotropic etching of the top plate through the mask layer and forming the liquid chamber to have a substantially rectangular shape at the nozzle surface of the top plate by over-etching portions with the compensation patterns.

Abstract: A liquid discharging head has at least a discharge port for discharging liquid therefrom, a liquid flow path communicating with the discharge port to supply the liquid to the discharge port, a substrate provided with a heating member for creating a bubble in the liquid filling the liquid flow path, and a movable member having a movable portion having its free end at the discharge port side and provided at a location facing the heating member of the substrate with a gap with respect to the substrate, a supported and fixed portion supported on and fixed to the substrate, and a supporting portion provided near the supported and fixed portion of the movable portion. The free end of the movable member is displaced toward the discharge port side about the fulcrum portion of the movable member by pressure produced by the bubble being created to thereby discharge the liquid from the discharge port.

Abstract: In a magneto-optical recording medium, a first magnetic layer for participating in reproduction of information is laminated on a substrate. A second magnetic layer for storing information is laminated on the first magnetic layer. A third magnetic layer having a Curie temperature lower than those of the first and second magnetic layers is disposed between the first magnetic layer and the second magnetic layer. A magnetization of a region of the first magnetic layer adjacent to a region of the third magnetic layer the temperature of which is above the Curie temperature of the third magnetic layer is aligned with the direction of magnetization of a region around the region of the first magnetic layer.

Abstract: In accordance with the present invention, there is provided a liquid discharge head comprising a discharge port for discharging liquid, a liquid flow path provided with a bubble generation means for generating bubbles in liquid and communicated with the discharge port, and a movable member provided facing said bubble generation means in said liquid flow path and having a free end on a downstream side toward the discharge port, a first surface provided with the bubble generation means being continued to at least one second surface of the side wall surface of said liquid flow path and the front end surface having the opening of the discharge port with a curved surface, the first surface being one of surfaces forming the liquid flow path.

Abstract: A magnetooptical recording medium includes a first magnetic layer, a second magnetic layer whose Curie temperature is lower than that of the first magnetic layer, and a third magnetic layer, comprising a vertically-magnetizing film, whose Curie temperature is higher than that of the second magnetic layer. The first magnetic layer, the second magnetic layer and the third magnetic layer are in a state of exchange coupling with each other at a portion of a vertically-magnetizing film. A domain walls formed in the first magnetic layer moves when the temperature of the medium has been raised to at least the Curie temperature of the second magnetic layer.

Abstract: A magneto-optical recording medium includes at least a reproduction layer and a memory layer on a substrate on which a groove and a land is formed. Information is reproduced from the magneto-optical recording medium by transferring magnetization information recorded in the memory layer to the reproduction layer by magnetostatic coupling. Prior to recording of information, the magneto-optical recording medium is initialized such that a magnetization of the memory layer on the land is aligned in one direction and a magnetization of the memory layer on the groove is aligned in a direction opposite to the one direction.

Abstract: An optical information recording medium is provided which enables recording of information alternately in a land and a groove of a track, without requiring a track jumping operation. The medium has a plurality of tracks each including a land and a groove, and a mirror section which divides each track in the circumferential direction of the disk. The land and the groove are consecutively formed across the mirror section, so as to form the track. An optical information recording/reproducing apparatus using the medium and a master disk exposure apparatus for producing the medium are also disclosed.