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    MANUFACTURE OF OPTICAL RECORDING MEDIUM
    6.
    发明专利
    MANUFACTURE OF OPTICAL RECORDING MEDIUM 失效

    公开(公告)号：JP2000182286A

    公开(公告)日：2000-06-30

    申请号：JP35744998

    申请日：1998-12-16

    Applicant: TORAY INDUSTRIES

    Inventor： AMIOKA TAKAO ,  YAMAHO TOMOYA

    IPC: G11B7/26 ,  C23C14/34

    Abstract: PROBLEM TO BE SOLVED: To provide a phase change optical recording medium which has excellent high-density preservation durability by improving erasability in wet-hot preservation and preservation in initial recording which are important for the high density recording. SOLUTION: When the optical recording medium is manufactured in which medium information can be recorded, erased, and reproduced by irradiating a recording layer formed on a substrate with a light beam and is recorded and erased by phase change between an amorphous phase and a crystal phase, the recording layer is manufactured by sputtering and sputtering gas contains at least hydrogen.

    PRODUCTION OF OPTICAL RECORDING MEDIUM
    7.
    发明专利
    PRODUCTION OF OPTICAL RECORDING MEDIUM 失效

    公开(公告)号：JPH1166642A

    公开(公告)日：1999-03-09

    申请号：JP22811397

    申请日：1997-08-25

    Applicant: TORAY INDUSTRIES

    Inventor： NONAKA TOSHINAKA ,  AMIOKA TAKAO ,  OBAYASHI GENTARO

    IPC: G11B7/26

    Abstract: PROBLEM TO BE SOLVED: To decrease the residual stresses of a formed reflection layer or light absorption layer and to prevent interlayer peeling with lapse of time and the generation of a burst error at the time of repetitive use of a rewriting type recording medium by placing a substrate in a position where the substrate is not exposed to plasma at the time of forming the reflection layer or light absorption layer in the recording medium by sputtering deposition. SOLUTION: A facing target type magnetron sputtering method is used as the sputtering to place the substrate in the position where the substrate is not exposed to the plasma. The facing target type magnetron sputtering method consists in arranging two targets A, B so as to face each other, arranging magnets on the rear surfaces of the respective targets and arranging these magnets in such a manner that the N and S pole sides of the magnets existing on the rear surfaces of the targets A, B are proximity to the targets. As a result, the impingement quantity of γ electrons against the substrate may be decreased and the easy formation of the metallic layer having the decreased residual stresses is made possible.

    OPTICAL RECORDING MEDIUM
    8.
    发明专利
    OPTICAL RECORDING MEDIUM 失效

    公开(公告)号：JPH09265657A

    公开(公告)日：1997-10-07

    申请号：JP7462696

    申请日：1996-03-28

    Applicant: TORAY INDUSTRIES

    Inventor： AMIOKA TAKAO ,  NOBUMASA HITOSHI ,  OBAYASHI GENTARO

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

    Abstract: PROBLEM TO BE SOLVED: To decrease cross talk and cross erase and to match the recording characteristics in land tracks and groove tracks in a recording method using land tracks and groove tracks by forming a recording layer, a dielectric layer and a reflecting layer and specifying the component of the recording layer and the reflectance of the mirror part. SOLUTION: In this optical recording medium, recording and erasing of information is performed by the phase transition between an amorphous phase and a crystal phase, and both of lands and grooves are used for recording. The medium has at least a recording layer, a dielectric layer and a reflecting layer. The recording layer contains nitrogen. The reflectance of the mirror part in an amorphous state is =15% and

    INFORMATION RECORDING METHOD AND INFORMATION RECORDING MEDIUM
    9.
    发明专利
    INFORMATION RECORDING METHOD AND INFORMATION RECORDING MEDIUM 失效

    公开(公告)号：JP2002230763A

    公开(公告)日：2002-08-16

    申请号：JP2001028178

    申请日：2001-02-05

    Applicant: TORAY INDUSTRIES

    Inventor： AMIOKA TAKAO ,  HIKASA MASAFUMI

    IPC: G11B7/0045 ,  G11B7/125

    Abstract: PROBLEM TO BE SOLVED: To improve the jitter characteristic in high-speed recording of an information recording medium, more particularly an optical recording medium. SOLUTION: This information recording method is characterized in that a group of pulse strings consisting of the pulses of plural energy beams are used in forming one recording mark corresponding to an NRZI signal of an on state having a length of >=4T when the period of a recording timing generation clock is defined as T and that the >=2 pulses which are a second power level are included in a group of the pulse trains and when the first pulse among the >=2 pulses is defined as the first pulse and the last pulse as the last pulse, the time duration from the front end of the NRZI signal on the state having the length of >=4T to the last end of the first pulse is set at one value selected from a range greater than 1.5T to

    OPTICAL RECORDING MEDIUM
    10.
    发明专利
    OPTICAL RECORDING MEDIUM 失效

    公开(公告)号：JP2001202658A

    公开(公告)日：2001-07-27

    申请号：JP2000012821

    申请日：2000-01-21

    Applicant: TORAY INDUSTRIES

    Inventor： AMIOKA TAKAO ,  HIROTA KUSATO

    IPC: G11B7/24 ,  G11B7/243 ,  G11B7/258

    Abstract: PROBLEM TO BE SOLVED: To provide a high-density optical recording medium which is improved in the occurrence of cross erasure in high-density recording of the phase transition recording medium. SOLUTION: This optical recording medium is capable of recording, erasing and reproducing information by irradiating a recording layer formed on a substrate with light. The recording and erasing of the information are executed by the phase transition between an amorphous phase and a crystalline phase. Land and groove recording to record the information to both of the grooves and the lands is executed and the distance between the centers of the adjacent grooves and the grooves is below one wavelength with the wavelength of recording light in the air as a unit. The optical recording medium described above has at least a first protective layer, recording layer, second protective layer and reflection layer on the substrate and is formed by laminating these layers in this order. The thickness of the reflection layer is >=13 to =22 to

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