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公开(公告)号：EP1045381A2
公开(公告)日：2000-10-18
申请号：EP00107877.3
申请日：2000-04-12
申请人： SONY CORPORATION
IPC分类号： G11B11/105
CPC分类号： G11B11/10591
摘要： A first dielectric film 3, a first magnetic film 4, a second magnetic film 5, a second dielectric film 6, and a reflecting film 7 are formed on a substrate 2, one upon another in the order they are mentioned. The first magnetic film 4 is made of GdFeCo and has a predetermined Curie point. The second magnetic film 5 is made of TbFeCo and has a Curie point lower than that of the first magnetic film 4. The first magnetic film 4 has an oxide film.
摘要翻译： 在基板2上依次形成第一电介质膜3，第一磁性膜4，第二磁性膜5，第二电介质膜6和反射膜7。 第一磁性膜4由GdFeCo制成并具有预定的居里点。 第二磁性膜5由TbFeCo制成并具有比第一磁性膜4低的居里点。第一磁性膜4具有氧化膜。
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2.发明公开Optical recording medium, stamper for use to produce the optical recording medium, and method of producing the stamper 审中-公开一种光记录介质，用于制造光记录介质及其制造方法的模具的模板
公开(公告)号：EP1028413A3
公开(公告)日：2002-08-07
申请号：EP00102406.6
申请日：2000-02-03
申请人： SONY CORPORATION
发明人： Endo, Somei , Kanno, Masayoshi
CPC分类号： G11B7/24085 , G11B7/0938 , G11B7/261 , G11B11/10578 , G11B11/10582
摘要： The mark length of each of pits (1) forming together the pit train is made shorter than that of each of pits (1) for a to-be-written signal normalized at the predetermined bit interval T. Also, the mark length of a shortest one of the pits (1) forming together the pit train is set to 64.8 to 80.0 % of the shortest mark length for the to-be-written signal normalized at the predetermined bit interval T.
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公开(公告)号：EP1126444A3
公开(公告)日：2002-11-27
申请号：EP01103239.8
申请日：2001-02-12
申请人： SONY CORPORATION
发明人： Akimori, Toshihiro , Endo, Somei , Sato, Manabu
CPC分类号： G11B7/24085 , G11B7/007 , G11B7/261
摘要： An optical recording medium in which a high recording density is to be realized as compatibility with respect to a pre-existing optical recording medium is kept. A wobbling groove 5 is formed on a disc substrate 1. The modulation/demodulation system for the wobbling signals recorded on the wobbling groove 5 and that for information signals recorded and/or reproduced on or from the recording track are made to be the same as the modulation/demodulation system for a standardized pre-existing optical recording medium. Moreover, if the track pitch of kept recording track is Tp, the shortest recording mark period in recording on kept recording track is Mc, the wavelength of a light beam used in recording and/or reproducing kept recording track is λ, and the numerical aperture of the objective lens is NA, the following relation (1) to (3)X = Tp/(λ/NA)Y = Mc/(λ/NA)Y > 2.9118X2 - 5.5422X + 3.19 are met.
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4.发明公开Optical recording medium and master disc for preparation thereof 审中-公开Optisches Speichermedium und Matrizenplatte zur Herstellung desselben
公开(公告)号：EP1126444A2
公开(公告)日：2001-08-22
申请号：EP01103239.8
申请日：2001-02-12
申请人： SONY CORPORATION
发明人： Akimori, Toshihiro , Endo, Somei , Sato, Manabu
IPC分类号： G11B7/007
CPC分类号： G11B7/24085 , G11B7/007 , G11B7/261
摘要： An optical recording medium in which a high recording density is to be realized as compatibility with respect to a pre-existing optical recording medium is kept. A wobbling groove 5 is formed on a disc substrate 1. The modulation/demodulation system for the wobbling signals recorded on the wobbling groove 5 and that for information signals recorded and/or reproduced on or from the recording track are made to be the same as the modulation/demodulation system for a standardized pre-existing optical recording medium. Moreover, if the track pitch of kept recording track is Tp, the shortest recording mark period in recording on kept recording track is Mc, the wavelength of a light beam used in recording and/or reproducing kept recording track is λ, and the numerical aperture of the objective lens is NA, the following relation (1) to (3) X = Tp/(λ/NA) Y = Mc/(λ/NA) Y > 2.9118X 2 - 5.5422X + 3.19 are met.
摘要翻译： 保持要将高记录密度实现为与现有光记录介质兼容的光记录介质。 摇摆槽5形成在盘基片1上。记录在摆动槽5上的摆动信号的调制/解调系统和用于记录轨道上记录和/或再现的信息信号的调制/解调系统被制成与 用于标准化的预先存在的光学记录介质的调制/解调系统。 此外，如果保持的记录轨道的轨道间距为Tp，则在保持的记录轨道上记录的最短记录标记周期为Mc，用于记录和/或再现保持记录轨道的光束的波长为λ，数值孔径 （1）〜（3）
X = Tp /（λ/ NA） Y = Mc /（λ/ NA）满足DF NUM =“（3）”> Y> 2.9118X 2 -5.55422X + 3.19 。 -
公开(公告)号：EP1045381A3
公开(公告)日：2000-11-15
申请号：EP00107877.3
申请日：2000-04-12
申请人： SONY CORPORATION
IPC分类号： G11B11/105
CPC分类号： G11B11/10591
摘要： A first dielectric film 3, a first magnetic film 4, a second magnetic film 5, a second dielectric film 6, and a reflecting film 7 are formed on a substrate 2, one upon another in the order they are mentioned. The first magnetic film 4 is made of GdFeCo and has a predetermined Curie point. The second magnetic film 5 is made of TbFeCo and has a Curie point lower than that of the first magnetic film 4. The first magnetic film 4 has an oxide film.
摘要翻译： 第一电介质膜3，第一磁性膜4，第二磁性膜5，第二电介质膜6和反射膜7以它们所提到的顺序依次形成在基板2上。 第一磁性膜4由GdFeCo制成，具有规定的居里点。 第二磁性膜5由TbFeCo制成，居里点低于第一磁性膜4的居里点。第一磁性膜4具有氧化物膜。
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6.发明公开Optical recording medium, stamper for use to produce the optical recording medium, and method of producing the stamper 审中-公开一种光记录介质，用于制造光记录介质及其制造方法的模具的模板
公开(公告)号：EP1028413A2
公开(公告)日：2000-08-16
申请号：EP00102406.6
申请日：2000-02-03
申请人： SONY CORPORATION
发明人： Endo, Somei , Kanno, Masayoshi
CPC分类号： G11B7/24085 , G11B7/0938 , G11B7/261 , G11B11/10578 , G11B11/10582
摘要： The mark length of each of pits (1) forming together the pit train is made shorter than that of each of pits (1) for a to-be-written signal normalized at the predetermined bit interval T. Also, the mark length of a shortest one of the pits (1) forming together the pit train is set to 64.8 to 80.0 % of the shortest mark length for the to-be-written signal normalized at the predetermined bit interval T.
摘要翻译： 每个凹坑（1）一起形成的凹坑串中的标记长度大于每个坑（1）在预定的比特间隔T.因此归一化的待写入的信号，一个长度的标记中的更短 凹坑的最短的一个（1）一起形成的坑点列被设定为64.8，以最短标记长度的80.0％为在预定的比特间隔归一化的待写入的信号T.
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