公开(公告)号：EP0239130B1

公开(公告)日：1992-07-15

申请号：EP87104626.4

申请日：1987-03-27

申请人： HITACHI, LTD. ,  Hitachi Maxell Ltd.

发明人： Sudo, Ryoichi ,  Miwa, Hiroaki ,  Tajima, Tetsuo ,  Horigome, Shinkichi

IPC分类号： G11B7/24

CPC分类号： G11B7/253 ,  C08F20/30 ,  Y10S428/913 ,  Y10S430/146

公开(公告)号：EP0239130A2

公开(公告)日：1987-09-30

申请号：EP87104626.4

申请日：1987-03-27

申请人： HITACHI, LTD. ,  Hitachi Maxell Ltd.

发明人： Sudo, Ryoichi ,  Miwa, Hiroaki ,  Tajima, Tetsuo ,  Horigome, Shinkichi

IPC分类号： G11B7/24

CPC分类号： G11B7/253 ,  C08F20/30 ,  Y10S428/913 ,  Y10S430/146

摘要： An optical disc wherein a transparent base plate is made from a special light-curable resin composition comprising at least one compound of the formula:
wherein R₁ = H or methyl and n = 0-5, and a photo­polymerization initiator.

摘要翻译： 一种光盘，其中透明基板由特殊的光固化树脂组合物制成，该组合物包含至少一种下式的化合物：其中R1 = H或甲基，n = 0-5的化合物和光聚合引发剂。

公开(公告)号：EP0432731A3

公开(公告)日：1992-03-18

申请号：EP90123820.4

申请日：1990-12-11

申请人： HITACHI, LTD. ,  HITACHI MAXELL, LTD.

发明人： Okamine, Shigenori ,  Nishida, Tetsuya ,  Horigome, Shinkichi ,  Terao, Motoyasu ,  Ohta, Norio

IPC分类号： G11B7/24 ,  G11B7/00

CPC分类号： G11B7/24 ,  G11B7/0045

摘要： An information recording medium (32) which comprises two or more energy beam absorbing layers (2, 4) which are formed at different positions across the thickness within the depth of focus of the energy beam, and an energy beam transmitting layer (3) interposed between said energy beam absorbing layers (2, 4). A method for recording and reproducing information by applying an energy beam to an information recording medium (32) mentioned above, characterized in that the information recording is accomplished in response to the energy beam power which varies or the pulse waveform which varies, or both. An apparatus for reproducing information which comprises a means (30) to encode information into recording signals and a means (31) to drive the irradiating energy beam. The information recording medium (32) has a high recording density and a large recording capacity owing to its capability of multi-valued recording.

公开(公告)号：EP0213307A3

公开(公告)日：1988-09-07

申请号：EP86108789

申请日：1986-06-27

申请人： HITACHI, LTD. ,  Hitachi Maxell Ltd.

发明人： Tajima, Tetsuo ,  Miwa, Hiroaki ,  Sudo, Ryoichi ,  Horigome, Shinkichi

IPC分类号： G11B07/24

CPC分类号： G11B7/256 ,  G11B7/2531 ,  G11B7/2533 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  Y10S430/146 ,  Y10T428/31605

摘要： Optical discs obtained by using as a primer layer formed on a transparent substrate and under a metal-made recording film a cured ultraviolet-curable resin composition comprising (a) a reaction product of isophorone diiso­cyanate or the like and an acrylate or methacrylate, (b) a diacrylate or dimethacrylate and (c) a photopolymerization initiator are excellent in recording sensitivity, moisture resistance, heat resistance, adhesive properties, reliability, etc.

公开(公告)号：EP0432731A2

公开(公告)日：1991-06-19

申请号：EP90123820.4

申请日：1990-12-11

申请人： HITACHI, LTD. ,  HITACHI MAXELL, LTD.

发明人： Okamine, Shigenori ,  Nishida, Tetsuya ,  Horigome, Shinkichi ,  Terao, Motoyasu ,  Ohta, Norio

IPC分类号： G11B7/24 ,  G11B7/00

CPC分类号： G11B7/24 ,  G11B7/0045

摘要： An information recording medium (32) which comprises two or more energy beam absorbing layers (2, 4) which are formed at different positions across the thickness within the depth of focus of the energy beam, and an energy beam transmitting layer (3) interposed between said energy beam absorbing layers (2, 4).
A method for recording and reproducing information by applying an energy beam to an information recording medium (32) mentioned above, characterized in that the information recording is accomplished in response to the energy beam power which varies or the pulse waveform which varies, or both.
An apparatus for reproducing information which comprises a means (30) to encode information into recording signals and a means (31) to drive the irradiating energy beam.
The information recording medium (32) has a high recording density and a large recording capacity owing to its capability of multi-valued recording.

摘要翻译： 其包括两个或多个能量束吸收层的信息记录介质（32）（2,4），它们是在整个能量束的焦点深度内的厚度的不同位置形成，并且，以能量束发射层（3）夹 所述能量束吸收层之间（2，4）。 通过在信息施加到能量束到记录上述培养基（32），用于记录和再现信息的方法，其特征在于，所做的信息记录是响应于而变化的能量束的功率或脉冲波形而变化，或二者来实现。 一种用于再现包括装置（30）的信息来编码信息到记录信号和装置（31）以驱动所述照射能量束的装置。 的信息记录介质（32）具有高的记录密度，并且由于其多值记录的能力的大的记录容量。

公开(公告)号：EP0227981A3

公开(公告)日：1988-01-07

申请号：EP86116999

申请日：1986-12-06

申请人： Hitachi Maxell Ltd. ,  HITACHI, LTD.

发明人： Gotoh, Akira ,  Yamazaki, Yukinobu ,  Kikuchi, Naoyuki ,  Horigome, Shinkichi ,  Terao, Motoyasu ,  Suzuki, Hiroyuki ,  Kito, Makoto ,  Kokaku, Yuichi ,  Shimizu, Mitsuru

IPC分类号： G11B07/24

CPC分类号： G11B7/24 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2575 ,  G11B2007/24312 ,  G11B2007/24316 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/261 ,  Y10T428/266 ,  Y10T428/31507 ,  Y10T428/31511 ,  Y10T428/3154 ,  Y10T428/31544 ,  Y10T428/31681 ,  Y10T428/31692 ,  Y10T428/31721 ,  Y10T428/31786 ,  Y10T428/3183

摘要： In an optical recording medium, an under layer is formed between an even pattern of a substrate and a recording layer, and said under layer is made of a high polymeric material which can be melted, sublimated, or decomposed at a lower temperature than the melting point, the sublimating point, or the decomposing temperature of said recording layer. Accordingly, said under layer can relax the thermal shock transferred from said substrate into said recording layer, and the deformation of said substrate can be prevented, even though a laser beam for playback is repeatedly radiated onto said recording layer, and said optical recording medium has a larger recording sensitivity than the recording sensitivity of an optical recording disc of a prior art.

公开(公告)号：EP0227981B1

公开(公告)日：1992-01-08

申请号：EP86116999.3

申请日：1986-12-06

申请人： Hitachi Maxell Ltd. ,  HITACHI, LTD.

发明人： Gotoh, Akira ,  Yamazaki, Yukinobu ,  Kikuchi, Naoyuki ,  Horigome, Shinkichi ,  Terao, Motoyasu ,  Suzuki, Hiroyuki ,  Kito, Makoto ,  Kokaku, Yuichi ,  Shimizu, Mitsuru

IPC分类号： G11B7/24 ,  G11B7/007

CPC分类号： G11B7/24 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2575 ,  G11B2007/24312 ,  G11B2007/24316 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/261 ,  Y10T428/266 ,  Y10T428/31507 ,  Y10T428/31511 ,  Y10T428/3154 ,  Y10T428/31544 ,  Y10T428/31681 ,  Y10T428/31692 ,  Y10T428/31721 ,  Y10T428/31786 ,  Y10T428/3183

摘要： In an optical recording medium, an under layer is formed between an even pattern of a substrate and a recording layer, and said under layer is made of a high polymeric material which can be melted, sublimated, or decomposed at a lower temperature than the melting point, the sublimating point, or the decomposing temperature of said recording layer. Accordingly, said under layer can relax the thermal shock transferred from said substrate into said recording layer, and the deformation of said substrate can be prevented, even through a laser beam for playback is repeatedly radiated onto said recording layer, and said optical recording medium has a larger recording sensitivity than the recording sensitivity of an optical recording disc of a prior art.

公开(公告)号：EP0227981A2

公开(公告)日：1987-07-08

申请号：EP86116999.3

申请日：1986-12-06

申请人： Hitachi Maxell Ltd. ,  HITACHI, LTD.

发明人： Gotoh, Akira ,  Yamazaki, Yukinobu ,  Kikuchi, Naoyuki ,  Horigome, Shinkichi ,  Terao, Motoyasu ,  Suzuki, Hiroyuki ,  Kito, Makoto ,  Kokaku, Yuichi ,  Shimizu, Mitsuru

IPC分类号： G11B7/24 ,  G11B7/007

CPC分类号： G11B7/24 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2575 ,  G11B2007/24312 ,  G11B2007/24316 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/261 ,  Y10T428/266 ,  Y10T428/31507 ,  Y10T428/31511 ,  Y10T428/3154 ,  Y10T428/31544 ,  Y10T428/31681 ,  Y10T428/31692 ,  Y10T428/31721 ,  Y10T428/31786 ,  Y10T428/3183

摘要： In an optical recording medium, an under layer is formed between an even pattern of a substrate and a recording layer, and said under layer is made of a high polymeric material which can be melted, sublimated, or decomposed at a lower temperature than the melting point, the sublimating point, or the decomposing temperature of said recording layer. Accordingly, said under layer can relax the thermal shock transferred from said substrate into said recording layer, and the deformation of said substrate can be prevented, even though a laser beam for playback is repeatedly radiated onto said recording layer, and said optical recording medium has a larger recording sensitivity than the recording sensitivity of an optical recording disc of a prior art.

公开(公告)号：EP0432731B1

公开(公告)日：1996-03-20

申请号：EP90123820.4

申请日：1990-12-11

申请人： HITACHI, LTD. ,  HITACHI MAXELL, LTD.

发明人： Okamine, Shigenori ,  Nishida, Tetsuya ,  Horigome, Shinkichi ,  Terao, Motoyasu ,  Ohta, Norio

IPC分类号： G11B7/24 ,  G11B7/00

CPC分类号： G11B7/24 ,  G11B7/0045

公开(公告)号：EP0418017A3

公开(公告)日：1992-09-02

申请号：EP90309883.8

申请日：1990-09-10

申请人： Hitachi Maxell Ltd. ,  HITACHI, LTD.

发明人： Goto, Akira ,  Nakamichi, Shuhei ,  Horigome, Shinkichi ,  Nishida, Tetsuya

IPC分类号： G11B7/26 ,  G11B7/24

CPC分类号： G11B7/26 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/31504

摘要： Disclosed are a method of manufacturing an optical recording medium having a process of interposing an organic compound between a metal stamper and a transparent substrate and forming a replica onto which a signal surface formed on the metal stamper is transferred on the transparent sub­strate, which comprises a process of manufacturing the replica which comprises the steps of (a) forming a coated film of at least the first organic compound on the signal surface of the metal stamper, (b) placing a solution of the second organic compound which is permeable or dissolvable into the first organic compound on the coated film of the first organic compound in a doughnut shape and extending the solution by pressing the transparent substrate against the same to laminate a coated film, (c) permeating and impreg­nating a solution of the second organic compound into and with the first organic compound, (d) curing the laminated layer composed of the first organic compound and the second organic compound to form a cured laminated layer, and (e) exfoliating the laminated layer from the stamper to obtain a replica layer, and further comprises the steps off (f) baking a laminated member obtained in the step (e), (g) forming a coated film composed only of the first organic compound to the preformat pattern surface of the obtained replica layer and drying the same, (h) forming a recording film on the layer composed only of the first organic compound, and (i) baking a laminated member obtained in the step (h), and an optical recording medium, which comprises a transparent substrate, a replica layer formed on one surface of the transparent substrate, and a layer composed only of a first organic compound and a recording film layer being laminated in this order on the surface of the replica layer onto which the preformat pattern is transferred, the replica layer composed of a second organic compound layer and mixed layer in this order from the transparent substrate, the mixed layer being composed of the first organic compound and the second organic compound.