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    3.
    发明专利
    未知

    公开(公告)号：DE69928190T2

    公开(公告)日：2006-07-27

    申请号：DE69928190

    申请日：1999-02-24

    Applicant: SONY CORP

    Inventor： KURODA YUJI ,  KASAMI YUTAKA

    IPC: G11B7/24035 ,  G11B7/24 ,  G11B7/243 ,  G11B7/257 ,  G11B7/258 ,  G11B7/2585 ,  G11B7/259 ,  G11B7/2595

    Abstract: An optical recording medium having a recording layer made of a phase-transition material. The ratio (Ac/Aa) of the absorption factor (Ac) of when the recording layer is in a crystalline phase to the absorption factor (Aa) of when it is in an amorphous phase is 0.9 or over. A crystallization-promoting layer for promoting crystallization of the phase-transition material is formed in contact with at least one of the sides of the recording layer. Control of absorption factor and promotion of crystallization are both achieved, so that the differences of physical properties of crystalline and amorphous phases are properly compensated, and good direct overwrite is realized even under high-speed and high-density condition.

    4.
    发明专利
    未知

    公开(公告)号：DE69928190D1

    公开(公告)日：2005-12-15

    申请号：DE69928190

    申请日：1999-02-24

    Applicant: SONY CORP

    Inventor： KURODA YUJI ,  KASAMI YUTAKA

    IPC: G11B7/24035 ,  G11B7/24 ,  G11B7/243 ,  G11B7/257 ,  G11B7/258 ,  G11B7/2585 ,  G11B7/259 ,  G11B7/2595

    Abstract: An optical recording medium having a recording layer made of a phase-transition material. The ratio (Ac/Aa) of the absorption factor (Ac) of when the recording layer is in a crystalline phase to the absorption factor (Aa) of when it is in an amorphous phase is 0.9 or over. A crystallization-promoting layer for promoting crystallization of the phase-transition material is formed in contact with at least one of the sides of the recording layer. Control of absorption factor and promotion of crystallization are both achieved, so that the differences of physical properties of crystalline and amorphous phases are properly compensated, and good direct overwrite is realized even under high-speed and high-density condition.

    7.
    发明专利
    未知

    公开(公告)号：DE60027089T2

    公开(公告)日：2006-09-21

    申请号：DE60027089

    申请日：2000-06-29

    Applicant: SONY CORP

    Inventor： KURODA YUJI ,  KISHIMA KOICHIRO ,  ICHIMURA ISAO ,  OSATO KIYOSHI

    IPC: G11B7/24 ,  G11B7/004 ,  G11B7/135 ,  G11B7/257 ,  G11B11/105

    Abstract: An optical recording medium (51) and an optical recording and reproduction device including the same, wherein the optical recording medium (51) comprises a substrate (61), a reflective layer (62) formed on the substrate (61), a recording layer (64) formed on the reflective layer (62), a first protective layer (65) formed on the recording layer (64) and a transparent heat radiating layer (66) formed on the first protective layer (65) for promoting dispersion of heat from the recording layer (64), and light is focused on the recording layer (64) from an optical system via a side at which the heat radiating layer (66) is formed to prevent heat buildup, erasure of recorded signals and damage to the optical recording medium.

    8.
    发明专利
    未知

    公开(公告)号：DE60027089D1

    公开(公告)日：2006-05-18

    申请号：DE60027089

    申请日：2000-06-29

    Applicant: SONY CORP

    Inventor： KURODA YUJI ,  KISHIMA KOICHIRO ,  ICHIMURA ISAO ,  OSATO KIYOSHI

    IPC: G11B7/24 ,  G11B7/004 ,  G11B7/135 ,  G11B7/257 ,  G11B11/105

    Abstract: An optical recording medium (51) and an optical recording and reproduction device including the same, wherein the optical recording medium (51) comprises a substrate (61), a reflective layer (62) formed on the substrate (61), a recording layer (64) formed on the reflective layer (62), a first protective layer (65) formed on the recording layer (64) and a transparent heat radiating layer (66) formed on the first protective layer (65) for promoting dispersion of heat from the recording layer (64), and light is focused on the recording layer (64) from an optical system via a side at which the heat radiating layer (66) is formed to prevent heat buildup, erasure of recorded signals and damage to the optical recording medium.

    OPTICAL RECORDING MEDIUM, ITS PRODUCTION AND OPTICAL RECORDING DEVICE
    9.
    发明专利
    OPTICAL RECORDING MEDIUM, ITS PRODUCTION AND OPTICAL RECORDING DEVICE 失效

    公开(公告)号：JP2001023244A

    公开(公告)日：2001-01-26

    申请号：JP19674399

    申请日：1999-07-09

    Applicant: SONY CORP

    Inventor： KIJIMA KOICHIRO ,  KURODA YUJI ,  ICHIMURA ISAO ,  OSATO KIYOSHI ,  SAITO KIMIHIRO

    IPC: G11B7/24 ,  G11B7/243 ,  G11B7/254 ,  G11B7/258 ,  G11B7/26 ,  G11B11/105

    Abstract: PROBLEM TO BE SOLVED: To provide an optical recording medium for a near field system which has high intensity of reproduced signals and which is hardly damaged on the surface, and to provide a production method of the medium and an optical recording device equipped with that optical recording medium. SOLUTION: The optical recording medium consists of a substrate 11, reflection film 12 formed on the substrate 11, recording layer 14 formed on the reflection film 12, and first protective layer 15 formed on the recording layer 14, and information is recorded and reproduced by irradiating the recording layer 14 with light from an optical system through the first protective layer 15 side. An antireflection multilayered film 19 which causes no reflection of light on the surface of the first protective layer 15 is formed on first protective layer 15. The gap between the antireflection multilayered film 19 and the optical system forms a near field, and the antireflection multilayered film 19 is a multilayered film consisting of layers having a specified refractive index and film thickness to mitigate changes in the reproducing signal intensity caused by changes in the gap. The invention also provides the production method of the medium and an optical recording device having that optical recording medium.

    INFORMATION RECORDING DISK AND INFORMATION RECORDING AND REPRODUCING DEVICE
    10.
    发明专利
    INFORMATION RECORDING DISK AND INFORMATION RECORDING AND REPRODUCING DEVICE 失效

    公开(公告)号：JP2001023239A

    公开(公告)日：2001-01-26

    申请号：JP19652699

    申请日：1999-07-09

    Applicant: SONY CORP

    Inventor： KIJIMA KOICHIRO ,  ICHIMURA ISAO ,  KURODA YUJI ,  OSATO KIYOSHI

    IPC: G02B1/11 ,  G02B1/115 ,  G11B7/12 ,  G11B7/121 ,  G11B7/122 ,  G11B7/1387 ,  G11B7/24 ,  G11B7/24056 ,  G11B7/254 ,  G11B7/257 ,  G11B11/105

    Abstract: PROBLEM TO BE SOLVED: To suppress quantity of data which is lost when collision of light condensing elements is generated to a minimum by providing a signal recording layer positioned essentially on a surface section facing the light condensing element and having a non-reflection coating film formed on the surface section. SOLUTION: This information recording disk consists of a substrate 1, a reflecting film 2 consisting of aluminum, a second dielectric film 3, a signal recording layer 4 and a first dielectric film 5 formed in this order from the side of the substrate 1. An enhancing condition to the substrate 1 and an enhancing condition at a beam waist are constructed by the films of four layers of the reflecting film 2, the second dielectric film 3, the signal recording layer 4 and the first dielectric film 5. Non-reflecting coating consisting of third, fourth and fifth dielectric films 6, 7 and 8 is formed on the first dielectric film 5. The non-reflecting coating consisting of the third, fourth and fifth dielectric films 6, 7 and 8 makes the first dielectric film 5 non-reflect the beam made incident from a light condensing element (SIL) 10 at an angle to the surface of the information recording disk.

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