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    Optical recording medium and production process for the medium
    1.
    再颁专利
    Optical recording medium and production process for the medium 失效
    光记录介质和介质的生产工艺

    公开(公告)号：USRE36383E

    公开(公告)日：1999-11-09

    申请号：US904983

    申请日：1997-08-01

    申请人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    发明人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    IPC分类号： G11B7/243 ,  G03C1/00 ,  G11B7/24 ,  G11B11/12

    CPC分类号： G11B7/243 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/24322 ,  G11B7/2531 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2585 ,  Y10S430/146

    摘要： An optical information recording medium is provided in which the active layer is a phase change material capable of absorbing energy and being converted between a substantially amorphous state and a substantially crystalline state. The active layer contains nitrogen, which may be in the form of a nitride or nitrides of the constituent elements of the active layer, or may be a nitrided surface thereof. The inclusion of nitrogen inhibits localized shifting of the active material, which leads to degradation of the recording/erase properties of the medium. The optical recording medium includes a substrate, onto which is deposited in sequence a first dielectric layer, a nitrogen-containing active layer, a second dielectric layer, and a metallic reflecting layer. The second dielectric layer is made thin, so that the cooling rate of the active layer is increased to form a more uniform amorphous state.

    摘要翻译： 提供一种光学信息记录介质，其中有源层是能够吸收能量并在基本上非晶态和基本上结晶状态之间转换的相变材料。 有源层含有氮，其可以是活性层的构成元素的氮化物或氮化物的形式，或者可以是其氮化表面。 包含氮抑制活性材料的局部移动，这导致介质的记录/擦除性能的劣化。 光记录介质包括基板，依次沉积有第一介电层，含氮活性层，第二介电层和金属反射层。 使第二电介质层变薄，使活性层的冷却速度增加，形成更均匀的无定形状态。

    Optical recording medium and production process for the medium
    2.
    发明授权
    Optical recording medium and production process for the medium 失效
    光记录介质和介质的生产工艺

    公开(公告)号：US5194363A

    公开(公告)日：1993-03-16

    申请号：US559166

    申请日：1990-07-30

    申请人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    发明人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    IPC分类号： G11B7/243

    CPC分类号： G11B7/243 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/24322 ,  G11B7/2531 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2585 ,  Y10S430/146

    摘要： An optical information recording medium is provided in which the active layer is a phase change material capable of absorbing energy and being converted between a substantially amorphous state and a substantially crystalline state. The active layer contains nitrogen, which may be in the form of a nitride or nitrides of the constituent elements of the active layer, or may be a nitrided surface thereof. The inclusion of nitrogen inhibits localized shifting of the active material, which leads to degradation of the recording/erase properties of the medium. The optical recording medium includes a substrate, onto which is deposited in sequence a first dielectric layer, a nitrogen-containing active layer, a second dielectric layer, and a metallic reflecting layer. The second dielectric layer is made thin, so that the cooling rate of the active layer is increased to form a more uniform amorphous state.

    摘要翻译： 提供一种光学信息记录介质，其中有源层是能够吸收能量并在基本上非晶态和基本上结晶状态之间转换的相变材料。 有源层含有氮，其可以是活性层的构成元素的氮化物或氮化物的形式，或者可以是其氮化表面。 包含氮抑制活性材料的局部移动，这导致介质的记录/擦除性能的劣化。 光记录介质包括基板，依次沉积有第一介电层，含氮活性层，第二介电层和金属反射层。 使第二电介质层变薄，使活性层的冷却速度增加，形成更均匀的无定形状态。

    Method of recording and erasing information in an erasible optical recording medium
    4.
    发明授权
    Method of recording and erasing information in an erasible optical recording medium 失效
    在可擦写光记录介质中记录和擦除信息的方法

    公开(公告)号：US5230973A

    公开(公告)日：1993-07-27

    申请号：US573246

    申请日：1990-08-24

    申请人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    发明人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    IPC分类号： G11B7/243

    CPC分类号： G11B7/243 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/24322 ,  G11B7/2531 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2585 ,  Y10S430/146

    摘要： An optical information recording medium is disclosed in which the recording layer is a material capable of absorbing energy and being reversibly converted between a substantially non-crystalline or amorphous state and a substantially crystalline state. The recording layer is a Te-Ge-Sb composition which also contains nitrogen. The optical recording medium includes a substrate onto which is sequentially deposited a first dielectric layer, a nitrogen-containing recording layer, a second dielectric layer and a metallic reflecting layer. In order to control the sensitivity of the medium to laser irradiation, the second dielectric layer is graded in thickness and progressively becomes thicker as a function of increasing radius. Alternatively, in another embodiment, the reflecting layer is graded in thickness, and progressively becomes thinner as a function of increasing radius. To further optimize the write/erase characteristics, the write to erase power ratio, as well as the recording duty cycle of the laser are varied as a function of radial position.

    摘要翻译： 公开了一种光学信息记录介质，其中记录层是能够吸收能量并在基本上非晶态或非晶状态和基本上结晶状态之间可逆转换的材料。 记录层是还含有氮的Te-Ge-Sb组合物。 光记录介质包括其上依次沉积有第一介电层，含氮记录层，第二介电层和金属反射层的基板。 为了控制介质对激光照射的灵敏度，第二电介质层的厚度分级，随着半径的增加而逐渐变厚。 或者，在另一个实施例中，反射层的厚度分级，并随着半径的增加而逐渐变薄。 为了进一步优化写入/擦除特性，写入擦除功率比以及激光器的记录占空比随径向位置的变化而变化。

    Process for manufacturing an optical recording medium
    9.
    发明授权
    Process for manufacturing an optical recording medium 失效
    光记录介质的制造方法

    公开(公告)号：US5151295A

    公开(公告)日：1992-09-29

    申请号：US599692

    申请日：1990-10-18

    申请人： Katsumi Kawahara ,  Masami Uchida ,  Kazumi Yoshioka ,  Takeo Ohta ,  Keiichiro Horai

    发明人： Katsumi Kawahara ,  Masami Uchida ,  Kazumi Yoshioka ,  Takeo Ohta ,  Keiichiro Horai

    IPC分类号： G01B11/06 ,  G11B7/26

    CPC分类号： G11B7/26

    摘要： A method of depositing the layers of an optical recording medium to their requisite thicknesses is disclosed in which optical monitoring of the reflectivity of a first dielectric layer during deposition is used to determine the deposition rate. The reflectivity is monitored to determine the time period in which the reflectivity reaches a maximum or minimum value, which occurs when the layer is a quarter wave thick. The deposition rate is derived from that time period, and the deposition is continued for a time in accordance with the deposition rate until the requisite thickness of the first dielectric layer is obtained. The second dielectric layer is deposited for a lesser time period in accordance with the deposition rate which has been optically derived during deposition of the first dielectric layer.

    摘要翻译： 公开了一种将光学记录介质的层沉积到其所需厚度的方法，其中使用沉积期间第一介电层的反射率的光学监测来确定沉积速率。 监测反射率以确定反射率达到最大值或最小值的时间周期，当该层是四分之一波厚时发生。 从该时间段得出沉积速率，并根据沉积速率继续沉积一段时间，直到获得第一介电层所需的厚度。 根据在第一介电层沉积期间光学衍生的沉积速率，第二介电层沉积较少的时间段。