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    OPTICAL RECORDING MEDIUM
    96.
    发明专利
    OPTICAL RECORDING MEDIUM 失效

    公开(公告)号：JPH1166623A

    公开(公告)日：1999-03-09

    申请号：JP21652497

    申请日：1997-08-11

    Applicant: TORAY INDUSTRIES

    Inventor： NAKAKUKI HIDEO ,  YOSHIDA REIKO ,  OBAYASHI GENTARO ,  NOBUMASA HITOSHI

    IPC: G11B7/254 ,  G11B7/00 ,  G11B7/003 ,  G11B7/0055 ,  G11B7/24 ,  G11B7/257 ,  G11B7/30

    Abstract: PROBLEM TO BE SOLVED: To make it possible to improve jitter characteristics after overwriting and to increase a density and capacity by having at least first dielectric layers, recording layers, second dielectric layers and resin layers on substrates and imparting a function to scatter the light entering from the substrates to these resin layers. SOLUTION: UV curing resins, etc., are used as resin layer materials to facilitate bonding of two sheets of disks. The intensity of the transmitted light is preferably 20 to 50% to the intensity of the light incident on the resin layers. Fillers of an oxide, such as, for example, titanium oxide, nitride, such as silicon nitride, and metallic powder, such as aluminum powder, are incorporated into the resin layers. The difference in the refractive index at the wavelengths of light in recording and erasing between the resin layers and the fillers is preferably specified to >=0.2. The jitter characteristics after overwriting are improved by decreasing the light absorbing quantity of the recording layer of the amorphous state. The optical recording medium of small noise may be manufactured even if the medium is formed of the structure obtd. by bonding two sheets of the disks to each other.

    OPTICAL RECORDING MEDIUM
    97.
    发明专利
    OPTICAL RECORDING MEDIUM 失效

    公开(公告)号：JPH1139713A

    公开(公告)日：1999-02-12

    申请号：JP19149397

    申请日：1997-07-16

    Applicant: TORAY INDUSTRIES

    Inventor： WATANABE YUJI ,  NOBUMASA HITOSHI ,  OBAYASHI GENTARO

    IPC: G11B7/241 ,  G11B7/24

    Abstract: PROBLEM TO BE SOLVED: To prevent deterioration in a recording characteristic and to improve signal contrast at a reproducing time with an optical interference effect by successively laminating first, second dielectric layers, a recording layer, a third dielectric layer and a reflection layer, arranging the mixture layer of both layer materials between the first, second dielectric layers and making the third dielectric layer thickness a specified range. SOLUTION: The mixture layer of both layer materials is arranged between first and second dielectric layers, peeling between the both layers is prevented and long term storage stability and an excellent rewrite repeat property are obtained. Further, the first dielectric layer thickness is made thinner than the second dielectric layer thickness for displaying the optical characteristic of the second dielectric layer. Further, the third dielectric layer thickness is made to 3-50 nm and crack occurrence and deterioration in repeat durability due to the thinning is prevented, further, the cooling degree lowering of a recording layer due to the thickness in the range or above is prevented and an excellent erase characteristic and repeat durability, particularly excellent recording/erasing characteristics when a mark length is recorded are obtained.

    OPTICAL RECORDING MEDIUM
    98.
    发明专利
    OPTICAL RECORDING MEDIUM 失效

    公开(公告)号：JPH1097734A

    公开(公告)日：1998-04-14

    申请号：JP10938097

    申请日：1997-04-25

    Applicant: TORAY INDUSTRIES

    Inventor： NONAKA TOSHINAKA ,  OBAYASHI GENTARO ,  NOBUMASA HITOSHI

    IPC: G11B7/243 ,  G11B7/24

    Abstract: PROBLEM TO BE SOLVED: To provide an optical recording medium with which high sensibility and high erasing rate are obtainable and which has excellent preservable property and life. SOLUTION: This optical recording medium allows recording, erasing and reproducing of information by irradiating a recording layer with light. The recording and erasing of the information are executed by the phase transition between an amorphous phase and a crystalline phase with this medium. The optical recording medium has a structure obtd. by laminating a first dielectric layer, the recording layer, a second dielectric layer and a reflection layer on a transparent substrate. The recording layer includes at least one kind of In, Se, Zn and Cd. The second dielectric layer is not transparent to the wavelength of light. The recording layer includes at least one kind of In, Se, Zn and Cd and the second dielectric layer contains materials having k of >=0.02 as its essential component when the virtual part of a refractive index is defined as k.

    SUPERCONDUCTOR
    100.
    发明专利
    SUPERCONDUCTOR 失效

    公开(公告)号：JPH04119916A

    公开(公告)日：1992-04-21

    申请号：JP23744490

    申请日：1990-09-06

    Applicant: TORAY INDUSTRIES

    Inventor： NOBUMASA HITOSHI ,  SHIMIZU KAZUHARU

    IPC: C01G21/00 ,  C01G1/00 ,  H01B12/00 ,  H01B13/00

    Abstract: PURPOSE:To obtain superconductors contg. blocking layers of the same type, having satisfactory matchability with the layers and different superconductivity transition temps. and facilitating common use by firing specified copper-contg. multiple oxides. CONSTITUTION:Powdery starting materials such as SrCO3, BaCO3, La2(CO3)3.xH2 O, CaCO3, Y2O3 and CuO are mixed in a prescribed ratio, pulverized, calcined at 800-900 deg.C in the air and pulverized to obtain calcined powder. This powder is mixed with PbO, molded, fired and heat-treated under 1-400atm partial pressure of oxygen to obtain a superconductor represented by the formula (where alphais an element selected among Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, 0

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