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    BARRIER LAYER ESTIMATING METHOD OF JOSEPHSON ELEMENT
    31.
    发明专利
    BARRIER LAYER ESTIMATING METHOD OF JOSEPHSON ELEMENT 失效

    公开(公告)号：JP2002124711A

    公开(公告)日：2002-04-26

    申请号：JP2000313327

    申请日：2000-10-13

    Applicant: FUJITSU LTD ,  INT SUPERCONDUCTIVITY TECH ,  HITACHI LTD

    Inventor： ISHIMARU YOSHIYASU ,  HORIBE OSAMI ,  TARUYA YOSHINOBU ,  TANABE KEIICHI

    IPC: G01N23/20 ,  H01L39/22 ,  H01L39/24

    Abstract: PROBLEM TO BE SOLVED: To provide an estimating method of a barrier layer of a Josephson element wherein characteristic of an oxide superconductor Josephson element manufactured by an IEJ method can be made uniform. SOLUTION: When a ramp edge type or a laminated type Josephson element is manufactured, a substrate 20 for inspection which has a superconductor film 21 is prepared. The substrate 20 is arranged in the vicinity of a substrate for element formation, and an amorphous layer forming process and an annealing process are performed to the substrates simultaneously, and barrier layers 22 are formed. Crystallinity of the barrier layer of the substrate 20 is examined by RHEED or LEED, and the crystallinity of the barrier layer of the substrate for element formation is estimated by using the result of the examination.

    MAGNETIC-SHIELDED TRANSFORMER
    32.
    发明专利
    MAGNETIC-SHIELDED TRANSFORMER 失效

    公开(公告)号：JP2002111273A

    公开(公告)日：2002-04-12

    申请号：JP2000300681

    申请日：2000-09-29

    Applicant: RAILWAY TECHNICAL RES INST ,  HOKURIKU ELECTRIC POWER ,  INT SUPERCONDUCTIVITY TECH

    Inventor： HASHIMOTO MITSUO ,  FUKUOKA KATSUHIRO ,  TOMITA MASARU ,  MIYAMOTO TAKESHI ,  MURAKAMI MASAHITO

    IPC: H05K9/00

    Abstract: PROBLEM TO BE SOLVED: To provide a magnetic-shielded transformer which encloses a magnetic path with a bulk high temperature superconductor to lessen the problems of the flux leakage, energy loss due to core loss and efficiency reduction. SOLUTION: A magnetic path of a flux resulting between a primary coil and a secondary coil is enclosed with a bulk high temperature superconductor which is composed of a plurality of clad bulk high temperature superconductors. The bulk high temperature superconductor is inserted between the primary coil and the secondary coil to block other magnetic paths from being formed, than the magnetic path of that flux. The magnetic path of that flux is an air core or a ferromagnetic core.

    SUPERCONDUCTING ELEMENT AND PRODUCING METHOD THEREFOR
    34.
    发明专利
    SUPERCONDUCTING ELEMENT AND PRODUCING METHOD THEREFOR 失效

    公开(公告)号：JP2001257392A

    公开(公告)日：2001-09-21

    申请号：JP2000069236

    申请日：2000-03-13

    Applicant: TOSHIBA CORP ,  INT SUPERCONDUCTIVITY TECH

    Inventor： INOUE SHINJI ,  YOSHIDA JIRO

    IPC: H01L39/22 ,  H01L39/24

    Abstract: PROBLEM TO BE SOLVED: To provide a superconducting element, having a junction structure, with which the junction area is reduced by effectively utilizing the advantage of lamp edge type, further, excessive inductance close to a junction is reduced and the crossover of wiring is enabled as well. SOLUTION: This superconducting element has a substrate (1), lower superconducting electrode (3) formed on the substrate (1), while having an end face inclined to the surface of the substrate, layer insulation film (8), barrier layer (6) formed on the end face of the lower superconducting electrode (3), upper superconducting electrode (4) formed so as to provide lamp edge type Josephson junction with the lower superconducting electrode (3) via the barrier layer (6), and superconducting wiring layer (5) formed with the upper end of the upper superconducting electrode (4) are practically flush with the upper surface of the layer insulating film (8) on the lower superconducting electrode (3).

    POLYCRYSTAL THIN FILM AND METHOD FOR PRODUCING THE SAME AND OXIDE SUPERCONDUCTIVE CONDUCTOR AND METHOD FOR PRODUCING THE SAME
    37.
    发明专利
    POLYCRYSTAL THIN FILM AND METHOD FOR PRODUCING THE SAME AND OXIDE SUPERCONDUCTIVE CONDUCTOR AND METHOD FOR PRODUCING THE SAME 失效

    公开(公告)号：JP2001114594A

    公开(公告)日：2001-04-24

    申请号：JP29597799

    申请日：1999-10-18

    Applicant: FUJIKURA LTD ,  INT SUPERCONDUCTIVITY TECH

    Inventor： IIJIMA YASUHIRO ,  KIMURA MARIKO ,  SAITO TAKASHI

    IPC: C30B29/22 ,  C30B23/02 ,  H01B12/06 ,  H01L39/24

    Abstract: PROBLEM TO BE SOLVED: To provide a polycrystal thin film which can arrange the axes c of the crystal axes of the C type crystal grains of a rare earth element oxide such as Y2O3 at a right angle based on the coating film-forming surface of a substrate, can simultaneously arrange the axes a and axes b of the crystal axes of the crystal grains in parallel to the film-forming surface, and has an excellent crystal orienting property. SOLUTION: This polycrystal thin film B consists mainly of oxide crystal grains 20 having the C type crystal structure of a rare earth element oxide represented by either composition formula of Y2O3, Sc2O3, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3, Er2O3, Yb2O3, Lu2O3, and Pm2O3 formed on the film-forming surface of the polycrystal substrate A. Therein, grain boundary inclination angles formed by the same crystal axes of the crystal grains of the polycrystal thin film along a surface parallel to the film-forming surface of the polycrystal substrate are

    DECIMATION FILTER
    38.
    发明专利
    DECIMATION FILTER 失效

    公开(公告)号：JP2001077667A

    公开(公告)日：2001-03-23

    申请号：JP25143899

    申请日：1999-09-06

    Applicant: HITACHI LTD ,  INT SUPERCONDUCTIVITY TECH ,  TOSHIBA CORP ,  NEC CORP

    Inventor： HASEGAWA HARUHIRO ,  MIYAHARA KAZUNORI ,  HASHIMOTO TATSUNORI ,  NAGASAWA SHUICHI ,  ENOMOTO YOICHI

    IPC: H03H17/00 ,  H03H17/02 ,  H03H17/06

    Abstract: PROBLEM TO BE SOLVED: To enable high-speed operation by generating on a signal line a pulse which is delayed an integral multiple of a clock behind an input signal pulse by a circuit block, composed of a shunt and a delay unit and counting pulses which are generated in a time, which is an integral multiple of the clock by a circuit block composed of a confluence unit and a counter. SOLUTION: Shunts 114 to 116, consisting of Josephson junctions and inductors, receive input signal pulses and shunt them to signal lines 117 to 119 and delay units 111 to 113. Then a 1st circuit block 11 generate on signal lines 117 to 1110 delayed pulses, which are as many as a decimation factor, e.g. '4'. In a 2nd circuit block, confluence units 122 to 124, consisting of Josephson junctions and inductors count and send delay pulses which are as many as the decimation factor '4' to a counter 121. The counter 121 is composed of a series connection of toggle flip-flops and holds its count result in cycles, which are 1/4 as long as the clock frequency.

    SUPERCONDUCTING JUNCTION AND SUPERCONDUCTING CIRCUIT
    40.
    发明专利
    SUPERCONDUCTING JUNCTION AND SUPERCONDUCTING CIRCUIT 失效

    公开(公告)号：JP2000353831A

    公开(公告)日：2000-12-19

    申请号：JP16321399

    申请日：1999-06-10

    Applicant: FUJITSU LTD ,  INT SUPERCONDUCTIVITY TECH

    Inventor： HARADA NAOKI ,  YOSHIDA AKIRA

    IPC: H03F19/00 ,  H01L39/22

    Abstract: PROBLEM TO BE SOLVED: To obtain a superconducting junction which can be operated at a fast speed by low energy by making an effective Mc Cumber coefficient which depends on electrostatic capacity of a capacitor part larger than a specified value and making an operating current flowing to a junction part during generation of a voltage in a junction part larger than a minimum current value which can maintain a voltage. SOLUTION: In a latch-type circuit, a high temperature superconducting junction can provide hysterisis to its I-V characteristic by connecting a capacitor part Cs to a junction part J1 in parallel. Furthermore, a Mc Cumber coefficient βc is adjusted and the relation between an operating current Iop flowing to the junction part J during generation of a voltage of the junction part J and a minimum current value Imin which can maintain a voltage is also adjusted to surely develop hysterisis. The Mc Camber coefficient βc is featured by hysteresis characteristic of a Josephson junction βc=2πIcCR2/ϕo. Here, Ic is the superconducting current, C is the electrostatic capacity and ϕo is the magnetic flux. When βc>1, hysteresis develops.

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