Abstract: A recording/reproduction element is mounted on a magnetic head slider via a piezoelectric element so that a displacement of the piezoelectric element performs fine control of the position of the recording/reproduction, thus enabling to obtain a fine spacing and a high track positioning accuracy. This improves a linear recording density and a track density. A pair of electrodes 15a and 15b are formed on both sides of a piezoelectric element to constitute a piezoelectric actuator. The electrode 15a is arranged so as to oppose to the rear surface (air flow out end) of a magnetic head slider 11. A recording/reproduction element 12 is arranged on the other electrode 15b in a state electrically insulated.

Abstract: A recording/reproduction element is mounted on a magnetic head slider via a piezoelectric element so that a displacement of the piezoelectric element performs fine control of the position of the recording/reproduction, thus enabling fine spacing and high tract positioning accuracy. This improves linear recording density and track density. A pair of electrodes are formed on both sides of a piezoelectric element to constitute a piezoelectric actuator. One electrode is arranged opposite the rear surface (air flow out end) of a magnetic head slider 11. A recording/reproduction element is arranged on and electrically insulated from the other electrode. The piezoelectric element includes a piezoelectric element displaced in a spacing direction, enabling fine spacing control, a piezoelectric element displaced in the track direction, enabling fine track position control, and a piezoelectric element displaced in a magnetic disc rotation direction, enabling reduction of jitter of a reproduction signal.

Abstract: In an optical module having a silicon substrate, a plurality of optical semiconductor devices and optical waveguides for performing transmission of optical signals by the semiconductor devices integrated on the silicon substrate, the silicon substrate is doped with an impurity to increase the number of carriers in the silicon substrate for suppressing optical crosstalk between the plurality of optical semiconductor devices, the optical waveguide is composed of a core part and a peripheral cladding layer of the core part, or optical fibers each coupled with each of the semiconductor devices, and an electrical resistivity of part or all of the silicon substrate is 0.

Abstract: An image display medium including: a pair of electroconductive layers, at least one of which is light-transmissive and which are opposed to each other to form a cell; and a dispersion contained in the cell and including a silicone oil; a colored particulate material dispersed in the silicone oil; and a polymer soluble in the silicone oil.

Abstract: The present invention relates to a pharmaceutical composition useful for rapid disintegration, which comprises a sparingly soluble medicament held on a gel-forming water-soluble polymer as a solid dispersion, wherein it contains a salt substance that comprises an alkali and a weak or strong acid and has an endothermic standard enthalpy of solution or heat of solution. Since rapid disintegration of the pharmaceutical composition of the present invention and rapid dissolution of the medicament contained in the preparation can be made in the digestive tracts pH-independently, good bioavailability can be attained.

Abstract: An image display medium including a pair of electroconductive layers, at least one of which is light-transmissive and which are opposed each other to form a cell; and a dispersion contained in the cell, wherein the dispersion includes a colored particulate material having at least one of an acidic group and a basic group; a hydrocarbon solvent; a resin soluble in the hydrocarbon solvent and having at least one of a basic group and an acidic group; and a compound having a nonionic polar group, and wherein when the particulate material has an acidic group, the resin has a basic group, and when the particulate material has a basic group, the resin has an acidic group.

Abstract: In an optical module having a silicon substrate, a plurality of optical semiconductor devices and optical waveguides for performing transmission of optical signals by the semiconductor devices integrated on the silicon substrate, the silicon substrate is doped with an impurity to increase the number of carriers in the silicon substrate for suppressing optical crosstalk between the plurality of optical semiconductor devices, the optical waveguide is composed of a core part and a peripheral cladding layer of the core part, or optical fibers each coupled with each of the semiconductor devices, and an electrical resistivity of part or all of the silicon substrate is 0.

Abstract: A contact magnetic disk apparatus includes a magnetic disk, a magnetic head, a contact pad, a suspension, an arm, an actuator, and a control section. The control section has a lubricant uniforming function of increasing a speed with which the magnetic head is moved toward an outer periphery of the magnetic disk to be higher than a speed with which the magnetic head is moved toward an inner periphery of the magnetic disk.

Abstract: A magnetic disk drive is provided having at least one magnetic disk, a magnetic head for writing and reading data, and a vessel in which the magnetic disk and magnetic head are sealed. The vessel is filled with air, an inert gas, or a mixture of air and inert gas. A clearance distance is provided between the magnetic disk and a surface opposite thereto, which distance is not larger than 1.0 mm when the vessel is filled with air, 1.1 mm with helium, 1.7 mm with neon, 1.2 mm with argon, 1.4 mm with krypton, and 1.2 mm with xenon. In one preferred embodiment, there may be provided a plurality of grooves on the stationary surface opposite to the magnetic disk, or a fan in a rotary shaft of the magnetic disk, in order to direct air inwardly between the magnetic disk and the surface opposite thereto. By setting the clearance distance as small as possible, it is possible to reduce the thickness reduction of lubricant caused by shearing force of air flow along the magnetic disk surface.

Abstract: A packaging platform for optically coupling one or more optical waveguides of one or more optical components having the optical waveguide to one or more optical fibers is provided with a reference structure portion for the horizontal and vertical positioning of the optical component. The platform is further provided with one or more fiber positioning portions for inserting and holding the optical fiber and positioning the optical fiber at a position where the optical fiber is optically connected to the optical waveguide. The provided packaging platform and an optical module using the platform can simplify all alignment steps for optical coupling, electrical connection and sealing in the coupling of the optical component and the optical fiber.

Abstract: A magnetic head slider in a magnetic disc drive system has a contact pad on a liquid bearing surface of the slider which bears on liquid applied on the magnetic disc. Each molecule of the liquid has at least two-polar groups for bridging the contact pad and the magnetic disc by intermolecular force. The bridging prevents the magnetic head slider from jumping over the magnetic disc.

Abstract: An opto-electronic hybrid integrated circuit of the present invention satisfies a low-loss optical waveguide function, an optical bench function and a high-frequency electrical wiring function. The circuit includes a substrate such as a silicon substrate, a dielectric optical waveguide part arranged in a recess of the substrate, and an optical device mounting part formed on a protrusion of the substrate. An electrical wiring part is disposed on the dielectric layer. The optical device is mounted on the substrate. An optical sub-module includes the optical device which is possible to mount on the substrate.

Abstract: A magnetic disk drive using a magnetic disk covered with a film of liquid lubricant for obviating wear ascribable to the friction and contact of the magnetic disk with a magnetic head is disclosed. The circumferential edge of the disk and the side wall of a casing are spaced from each other by 0.01 mm or less. In addition, the distance between the surface of the disk and a wall facing it, e.g., between the surfaces of adjacent disks or between the surface of each disk and the inner surface of a top wall or that of a bottom wall forming the casing is selected to be 3.00 mm or less.

Abstract: The invention provides a magnetic storage member having a magnetic medium coated on a substrate, a protective film coated on the medium, and a lubricant coated on the protective film, the lubricant having a functional group with an inorganic character of 110 or more. The magnetic storage member is provided with the lubricant which can prevent adsorption to a magnetic head, is not removed by sliding with the head and rotation of the magnetic storage member, and has excellent wear resistance.

Abstract: In order to provide a contact type magnetic disk device enabling a high density recording with improved reliability and sufficient robustness against wearing, a magnetic recording disk of the present invention comprises a body coated with a lubricant thin film of one of polybutene, maleic-anhydride-denatured polybutene and maleic-anhydride-denatured poly-alpha-olefin.

Abstract: An opto-electronic hybrid integrated circuit of the present invention satisfy a low-loss optical waveguide function, an optical bench function and a high-frequency electrical wiring function. The circuit includes a substrate such as a silicon substrate, a dielectric optical waveguide part arranged in a recess of the substrate, and an optical device mounting part formed on a protrusion of the substrate. An electrical wiring part is disposed on the dielectric layer. The optical device is mounted on the substrate. An optical sub-module includes the optical device which is possible to mount on the substrate.

Abstract: In order to enhance the rigidity of a magnetic head slider 2 in the seeking direction without increasing its rigidity in the tracking direction, convex parts 4 parallel to the seeking direction are provided on the surface of a supporting spring 3.

Abstract: In a magnetic recording medium, a substrate is made of mica having a cleavage surface, and a magnetic recording layer is formed on the cleavage surface.

Abstract: A magnetic head supporting device is provided in which a change in rigidity of a suspension in the case where the suspension is located inside and outside above a surface of a magnetic disk is reduced, thereby suppressing a flexure of the suspension member to suppress the generation of frictional forces, head crashes and the like. In a magnetic head supporting device including a suspension member 12 provided at a first end portion with a slider 11 for a magnetic head and composed of a spring member, a magnetic head arm 13 for holding the other end portion of the suspension member 12, and a linear actuator 14 for biasing the first end portion of the suspension member 12 through the magnetic head arm 13 to be reciprocatingly moved toward a central portion of a magnetic disk 100 above the surface of the magnetic disk 100, an elongated hole 16 having a predetermined width is provided on a centerline that connects the first end portion and the other end portion of the suspension member 12.

Abstract: An optical waveguide 3 comprises a substrate like a Si substrate having a projection with a flat surface and inclined side surfaces thereon, a buffer layer having a refractive index of n.sub.0 formed on lower surfaces of the substrate, a secondary buffer layer having a refractive index of n.sub.0 formed on the buffer layer, a core waveguide having a refractive index of n.sub.1 formed on the secondary buffer layer and a cladding layer having a refractive index of n.sub.0 covering the core waveguide. The flat surface of the projection 31 is exposed through an opening. The secondary buffer layer controls a transmission loss increase caused by partial thickness differences of the ground buffer layer or scattering by scratches or strains created by the grind.