Abstract: A superconductive device manufacturing method is disclosed, which can prevent the characteristic deterioration on the processed surface, reduce the number of process steps, and thereby shorten the manufacturing time. The superconductive device manufacturing method comprises the steps of: forming a YBCO film (301) on a substrate (201); forming a mask pattern (302) on the formed YBCO film (301); and etching the YBCO film (301) by use of the formed mask pattern (302) and a plasma including at least oxygen plasma.

Abstract: An oxide superconductor element, produced by forming a damaged region on a substrate surface by the Ga.sup.+ focusing ion beam method and then depositing an oxide superconductor thin-film over it, is characterized in that a NdBa.sub.2 Cu.sub.3 O.sub.7-y (0.ltoreq.y.ltoreq.0.5) oxide superconductor is used in a tunnel junction having a tunneling barrier region with weak superconductivity.

Abstract: In a double-layered optical disk capable of reading two-layer information from one face, the substrates constituting this optical disk can hardly peel even with a dropping shock or a change over time. The double-layered optical disk is constituted by a transparent first substrate, a first information recording layer, and a second substrate adhered to the first substrate through the first information recording layer. The first substrate has information pits to be read with a read laser beam and is transparent to this read laser beam. The first information recording layer is formed on the information pit formation surface of the first substrate and is made of an inorganic dielectric having a higher refractive index than that of the first substrate.

Abstract: The invention provides a wide frequency band high temperature superconductor mixer antenna which allows a superconductor feed line, which exhibits a high resistance loss in a high frequency region, to be used in a low frequency region with a low loss and which is provided with a same structure as a mixer which has a wide band twice or more the frequency of a millimeter or more wave while keeping a characteristic of a high integration array antenna, which makes most of the high integrity of superconductor feed lines. The wide frequency band high temperature superconductor mixer antenna includes one or a plurality of planar structure antenna patterns of the log-periodical type or the log-spiral type and a plurality of oxide superconductor thin film feed line wiring patterns formed on a same face of a main surface of a substrate, a central portion of each of the planar structure antenna patterns being formed from an oxide superconductor thin film on which a non-linear element part is provided.

Abstract: A superconducting patch antenna array, operative at a temperature lower than or equal to that of liquid nitrogen, includes a superconducting mixer comprising at least one non-linear Josephson junction to transform the received high frequency signal to a lower intermediate frequency for purposes of reducing the transmission loss and thereby increasing the antenna performance.

Abstract: A data storage device includes a memory for storing fixed-form data such as schedule data and a memory for storing handwriting memory data. When a particular key is operated when a schedule is displayed, a memorandum input screen is opened on the display. The user is able to input memorandum data by handwriting on the input screen or read-out and display already stored memorandum data on the input screen. By operating a key displayed on the input screen, the written or read-out memory data can be stuck as a memorandum to the displayed schedule or its date.

Abstract: To make the turning "on" and "off" of a clutch in an electro-magnetic clutch smoother, the electro-magnetic clutch has a first rotating member rotatable in response to the driving force applied to the input axis, and a second rotating member arranged opposite to the first rotating member and freely rotatable about the rotation axis of the first rotating member and coupled to the output axis. A movable member is coupled to one end of a return spring and is disposed between the first rotating member and the second rotating member for movement along the rotation axis of the first rotating member. An electric coil generates a force to drive the movable member along the rotation axis of the first rotating member. Cylindrical auxiliary slide members are arranged approximately at equal intervals on the movable member and are disposed between the movable member and the second rotating member.

Abstract: The present invention relates to an optical disk and a method of manufacturing the same, and, more particularly, to an optical disk which can ensure high-density recording and a method of pre-formatting this optical disk. This optical disk has a surface on which data is retrieved with a focused light beam and a light beam spot of a predetermined size is formed by the focused light beam, and comprises a first pit group having a plurality of unit pits of a unit pit length arranged in such a manner that adjoining unit pits are separated from each other with a blank of a first blank length, the blank being smaller than a size of the beam spot, the first blank length being set shorter than the unit pit length, and a second pit group following the first pit group and having a plurality of data pits whose lengths are substantially integer multiples of the unit pit length, the data pits being separated from one another with a blank of a second blank length.

Abstract: A superconducting device having a superconducting film measures a characteristic such as its resonance frequency while in an environment having a temperature that is less than or equal to its superconducting transition temperature. A laser then thermally etches the superconducting film on the basis of said measurement in the environment having a temperature that is less than or equal to a superconducting transition temperature.

Abstract: A sliding cable includes a core member, a tooth member wound around the core member and a covering member which is formed by extrusion molding of a foaming material and which covers the core member so as to project out from an outer circumferential surface of the tooth member.

Abstract: A superconductor junction material is disclosed which comprises a substrate of a single crystal, and at least flux flow element, and optionally at least one Josephson junction element, provided on the surface, each of the flux flow and Josephson junction elements being formed of a superconducting oxide layer having a weak link. The flux flow and Josephson junction elements are prepared by vacuum deposition at different oxygen partial pressures.

Abstract: A Josephson junction is disclosed which includes a substrate of a single crystal having a substantially flat surface, a wiring pattern of an oxide superconductor formed on the flat surface of the substrate, and an altered region formed having a width of 300 nm or less and formed in the wiring pattern to intersect the wiring pattern, the crystal orientations of the wiring pattern on both sides of the altered region being equal to each other.

Abstract: A superconducting device has a substrate and a superconducting film formed on the substrate. A surface of the substrate has a first surface portion of which a curvature is constant or changes continuously, a second surface portion of which a curvature is constant or changes continuously, and a third surface portion at which the first and second surface portions meet and at which the curvatures of the first and second surface portions become discontinuous. The superconducting film formed on the surface of said substrate has a grain boundary serving as a junction only in a portion corresponding to the third surface portion of the substrate.

Abstract: A photoresist pattern developed on a semiconductor substrate is rinsed by rinsing liquid. At this rinsing step, the rinsing liquid is heated to be decreased in surface tension, so that the collapse of the photoresist pattern is avoided.

Abstract: The recording scheme of an optical disk is initially determined by a cartridge identifier housing the optical disk. The optical disk is then rotated at a rotational speed corresponding to the initially determined recording scheme, and a signal processing circuit is switched. Management data recorded on the optical disk is read to also determine the recording scheme, thereby improving the reliability of the determination. When no management data can be read, a recording scheme and associated rotational speed are changed. The management data representing the recording scheme is then read according to the changed recording scheme. A medium type determined based on the management data has priority over that of the medium type obtained by the identifier of the cartridge.

Abstract: An apparatus, having a spindle motor for rotating a circular optical disk, for recording information on the optical disk rotated by the spindle motor, and reproducing information recorded on the optical disk, wherein whether the recording scheme of the optical disk is a mark interval or mark length recording scheme is discriminated, and information is recorded or recorded information is reproduced while the optical disk is rotated at a rotational speed corresponding to the discriminated recording scheme. In an apparatus for recording/reproducing information in accordance with both the mark interval and mark length recording schemes, a signal amplifier, a demodulation circuit, a modulation circuit, an error correction circuit, a buffer memory, an interface circuit, and the like can be commonly used between the two recording schemes, thereby decreasing the number of signal processing circuits.

Abstract: The invention is directed to an actuator which is mounted on a base to rotate a rotary member about a rotational axis thereof. The actuator includes a first magnetic rotary member which is rotatably mounted on the base about the axis, and provided with a first engaging portion which traces a peripheral locus about the axis. It also includes a second magnetic rotary member which is rotatably mounted about the axis, and provided with a second engaging portion engageable with the first engaging portion on the peripheral locus about the axis. The first engaging portion is moved to be engageable with the second engaging portion when the first rotary member is rotated in one direction relative to the second rotary member, and the first engaging portion is moved to be away from the second engaging portion when the first rotary member is rotated in the opposite direction.

Abstract: A laser beam is radiated on a recording medium such as a phase transition type optical disk to change optical characteristics depending on a change in arrangement of atoms in a recording layer of the recording medium so as to repetitively record/erase information represented by the lengths of optical marks, the recording power of the laser beam radiated to record the information in the recording medium is changed stepwise in two or more power levels sequentially higher than an erasure power level of a laser beam radiated to erase the information recorded in the recording medium.

Abstract: A laser driver outputs a drive current. A high frequency current generated by a HF current generator is superimposed to the drive current via a coupling capacitor. A laser diode is driven by the high-frequency-current superimposed drive current. This superimposed drive current has a period for performing a laser oscillation at the laser diode and a period for stopping the laser oscillation. The laser light is reflected at the surface of an optical disk and returned to the laser diode. When the reflected laser light is returned to the laser diode, the laser diode is in the laser oscillation stopping period of the superimposed drive current.

Abstract: Metal-insulator-metal devices having an insulation layer between two metal layers wherein the relative dielectric constant of the insulation layer is less than the relative dielectric constant of oxidized Ta, andC.sub.CF .times.C.sub.LC /[(C.sub.CF +C.sub.LC).times.C.sub.MIM ]>2where C.sub.CF is the capacitance of the second substrate, C.sub.LC is the capacitance of the liquid crystal material, and C.sub.MIM is the capacitance of the metal-insulator-metal elements and an active matrix liquid crystal display panel including the metal-insulator-metal devices are provided. A method for producing such an active matrix liquid crystal display panel is also provided.