Abstract: A liquid discharge head 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 the liquid, and movable members facing the heat generating members and being arranged in the liquid flow paths. The movable members have a free end on the discharge port side with a specific gap with respect to the heat generating members. The movable member is fixed to the substrate above the heat generating member on the substrate.

Abstract: A magneto-optical medium of a domain wall displacement type is provided which does not cause inward leakage of signals caused by domain wall displacement from the rear of a reproducing light spot. The magneto-optical medium comprises a domain wall displacement layer, a switching layer, and a memory layer. The switching layer has a boundary temperature higher than room temperature for transformation from a state of a perpendicular magnetization film to a state of an in-plane magnetization film.

Abstract: On a disk-shaped substrate with pits and grooves, a first dielectric layer, a magnetic layer, and a second dielectric layer are formed. A data region used for recording/reproduction includes a plurality of tracks, and is divided into a plurality of segments. Each segment includes a pit region and a groove region. Recording/reproducing tracks are composed of the grooves. Magnetic anisotropy of a magnetic layer positioned on each of lands between the respective recording/reproducing tracks is reduced to a level lower than that of magnetic anisotropy of the magnetic layers positioned on the grooves, so that the recording/reproducing tracks are magnetically separated. On an inner side of an innermost recording/reproducing track and on an outer side of an outermost recording/reproducing track, at least one dummy track is provided, respectively.

Abstract: Provided is a magneto-optical recording medium capable of accurately reproducing a signal of a recording density exceeding a resolution of an optical system without making a constitution thereof complicated. The magnetic domain wall displacement type magneto-optical recording medium, comprises: a magnetic domain wall displacement layer in which a magnetic domain wall moves to contribute to information reproduction; a memory layer holding a recorded magnetic domain corresponding to the information; and a switching layer which is arranged between the magnetic domain wall displacement layer and the memory layer and has a Curie temperature lower than Curie temperatures of the magnetic domain wall displacement layer and the memory layer.

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. The recording medium satisfies the following condition; (Tr−RT)/(Tc2−RT)≧1.8 where Tc2: Curie temperature of the cutoff layer, and RT: room temperature.

Abstract: On a disk-shaped substrate in which a predetermined region ranging in a radial direction is used as a data region for recording/reproduction, a first dielectric layer, a magnetic layer, and a second dielectric layer are provided. The data region includes recording/reproducing tracks composed of a plurality of discontinuous grooves or lands ranging from an innermost track to an outermost track. Magnetic anisotropy of each of magnetic layers positioned between the respective recording/reproducing tracks is reduced to a level lower than that of magnetic anisotropy of the magnetic layers positioned on the recording/reproducing tracks, so that the magnetic layers are magnetically separated only between the recording/reproducing tracks and not magnetically separated in flat portions without grooves. Thus, reflectance is even in the flat portions, thereby allowing tilt detection.

Abstract: A liquid discharge head, a liquid discharging apparatus having such a liquid discharge head, and a method for manufacturing such a liquid discharge head. The liquid discharge head is provided with 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.

Abstract: An ink jet recording head in which a heating resistor forming a heating portion, a wiring electrically connected to the heating resistor, and a protective film formed on the heating resistor and the wiring to protect the heating resistor and the wiring are arranged on a substrate for the ink jet recording head. An ink path in communication with a discharging port for discharging ink is also formed on the substrate for the ink jet recording head.

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: A liquid discharge head includes a pair of substrates mutually fixed in lamination, a plurality of liquid flow paths arranged on the bonded faces of the substrates, the leading end of the plural liquid flow paths being communicated with a plurality of discharge ports, a plurality of heat generating members arranged on at least one of the substrates corresponding to each of the liquid flow paths and a movable member having in the liquid flow path the free end thereof on the discharge port side, and a region between the heat generating member and the movable member, where liquid exists. In the liquid discharge head, a bubble is created by enabling thermal energy generated by the heat generating members to act upon the liquid, and the bubble is controlled by the movable member to discharge liquid in the liquid flow paths from the discharge ports to the outside.

Abstract: An ink jet head comprises a head substrate provided with a plurality of ink paths, pressure generating elements each arranged for each of the paths; and an orifice plate provided with ink discharge openings each communicated with each of the ink paths. Then, the bonding surface side of the orifice plate to the substrate is provided at least with the surface treatment. The orifice plate is formed by fluororesin or resin containing fluorine. With the structure thus arranged, it becomes possible to bond the orifice plate having ink repellency to the head substrate firmly and assuredly, while enabling the ink jet head thus manufactured to maintain a good ink repellency for a long time.

Abstract: On a disk-shaped substrate in which a predetermined region ranging in a radial direction is used as a data region for recording/reproduction, a first dielectric layer, a magnetic layer, and a second dielectric layer are provided. The data region includes recording/reproducing tracks composed of a plurality of discontinuous grooves or lands ranging from an innermost track to an outermost track. Magnetic anisotropy of each of magnetic layers positioned between the respective recording/reproducing tracks is reduced to a level lower than that of magnetic anisotropy of the magnetic layers positioned on the recording/reproducing tracks, so that the magnetic layers are magnetically separated only between the recording/reproducing tracks and not magnetically separated in flat portions without grooves. Thus, reflectance is even in the flat portions, thereby allowing tilt detection.

Abstract: On a disk-shaped substrate with pits and grooves, a first dielectric layer, a magnetic layer, and a second dielectric layer are formed. A data region used for recording/reproduction includes a plurality of tracks, and is divided into a plurality of segments. Each segment includes a pit region and a groove region. Recording/reproducing tracks are composed of the grooves. Magnetic anisotropy of a magnetic layer positioned on each of lands between the respective recording/reproducing tracks is reduced to a level lower than that of magnetic anisotropy of the magnetic layers positioned on the grooves, so that the recording/reproducing tracks are magnetically separated. On an inner side of an innermost recording/reproducing track and on an outer side of an outermost recording/reproducing track, at least one dummy track is provided, respectively.

Abstract: In ink jet recording head in which a heating resistor forming a heating portion, a wiring electrically connected to the heating resistor, and a protecting film formed on the heating resistor and the wiring to protect the heating resistor and the wiring are arranged on a substrate for the ink jet recording head, and an ink path communicated with a discharging port for discharging ink is formed on the substrate for the ink jet recording head, the protecting film includes a first layer protecting film for covering the heating resistor and the wiring, a second layer protecting film formed on the first layer protecting film by a material different from that of the first layer protecting film and having an opening in a portion corresponding to the heating portion of the heating resistor and constructed by an inorganic material, and a third layer protecting film constructed by the same material system as the first layer protecting film and covering the second layer protecting film and the first layer protecting film

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 method for manufacturing a liquid discharge head, which is provided with a movable film supporting member for supporting a movable film separating a first liquid flow path and a bubble creation region completely, and that is displaceable by the bubble created on the heat generating element. The method comprises the steps of forming the movable film supporting member, forming on the surface of the substrate becoming the movable film supporting member the recessed portion corresponding to the movable region of the movable film, providing a material becoming the movable film on the entire surface of the substrate having the recessed portion provided therefor, removing the portion including the movable region on the substrate from the reverse side of the substrate having the movable film provided therefor and forming a slacked configuration on the portion of the movable region of the movable film.

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: In order to avoid damages or deformations to ejection energy generating elements formed on a substrate or grooved plate, when the substrate and the grooved plate are joined, a liquid ejection head for an image forming apparatus includes a substrate having electro-thermal energy conversion elements thereon, a grooved plate having grooves formed at positions corresponding to the electro-thermal energy conversion elements, ejection ports communicating with the respective grooves, and liquid paths communicating with the ejection ports. At least two protrusions are formed on the substrate apart from each other and corresponding engaging recessed portions are formed on the grooved plate for engaging the protrusions. A height from the surface of the substrate to upper ends of the protrusions is set higher than a height from the surface of the substrate to upper ends of the electro-thermal energy conversion elements or other micro processed portions.

Abstract: A magneto-optical medium of a domain wall displacement type is provided which does not cause inward leakage of signals caused by domain wall displacement from the rear of a reproducing light spot. The magneto-optical medium comprises a domain wall displacement layer, a switching layer, and a memory layer. The switching layer has a boundary temperature higher than room temperature for transformation from a state of a perpendicular magnetization film to a state of an in-plane magnetization film.

Abstract: The present invention provides a method for manufacturing a liquid injecting head, in which liquid flow paths are defined by combining an element substrate having a plurality of discharge energy generating elements for applying discharge energy to liquid with a nozzle member having a plurality of liquid discharge nozzle grooves, which method comprises a step for preparing at least one material common to the element substrate as a base material of the nozzle member, a step for forming etching mask layers on a first surface of the base material of the nozzle member in which the nozzle grooves are formed and a second surface opposite to the first surface, a step for forming a recessed portion in the second surface of the base material by patterning the mask layer on the second surface of the base material and by effecting etching via the mask layer of the second surface, and a step for forming the nozzle grooves in the base material and for communicating the recessed portion with the nozzle grooves by patterning