公开(公告)号：US6033535A

公开(公告)日：2000-03-07

申请号：US477628

申请日：1995-06-07

申请人： Eiji Ohno ,  Yoshitaka Sakaue ,  Kenichi Nagata ,  Nobuo Akahira ,  Masahide Yokoyama ,  Hiroshi Hayata ,  Noboru Yamada

发明人： Eiji Ohno ,  Yoshitaka Sakaue ,  Kenichi Nagata ,  Nobuo Akahira ,  Masahide Yokoyama ,  Hiroshi Hayata ,  Noboru Yamada

IPC分类号： C23C14/34 ,  C23C14/35 ,  G11B7/243 ,  G11B7/26

CPC分类号： G11B7/243 ,  C23C14/3414 ,  C23C14/3464 ,  G11B7/26 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21

摘要： The present invention is to provide a method for manufacturing the PCE optical information recording disk under control of not only the crystallization velocity but also the complex index of refraction and thus the reflectance on the disk surface.The PCE optical information recording disk is suitable to be used under the constant angular velocity (the constant rotational numbers wherein the disk has a characteristic that the crystallization velocity is designed to become faster from inside area of the disk to outside area in the radical direction thereof under control of not only the crystallization velocity but also the complex index of refraction and thus the reflectance on the disk surface.In the case of mass production and high film formation to be required, the present invention provides an effective method for manufacturing the optical disk by means of sputtering from at least two targets at the same time in a manner that the crystallization velocity is increased in a radial direction from inside area to outside area in the disk.

摘要翻译： 本发明提供一种用于制造PCE光学信息记录盘的方法，该方法不仅可以控制结晶速度，而且可以控制复合折射率，从而在盘表面上的反射率。 PCE光学信息记录盘适用于以恒定角速度（其中盘具有结晶速度设计成从盘的内部区域到其沿自由度方向的外部区域变得更快的特性的恒定角速度 不仅可以控制结晶速度，而且可以控制复杂的折射率，从而提高光盘表面的反射率。在大量生产和需要高成膜的情况下，本发明提供了一种制造光盘的有效方法 通过同时从至少两个靶的溅射以使得结晶速度在盘的内部区域到外部区域的径向方向上增加的方式。

公开(公告)号：US5768233A

公开(公告)日：1998-06-16

申请号：US778950

申请日：1997-01-06

申请人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Eiji Ohno ,  Kenichi Nagata ,  Noboru Yamada

发明人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Eiji Ohno ,  Kenichi Nagata ,  Noboru Yamada

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/007 ,  G11B19/12 ,  G11B19/247 ,  G11B19/26 ,  G11B19/28 ,  G11B20/12

CPC分类号： G11B7/00454 ,  G11B19/26 ,  G11B7/0079 ,  G11B7/00745

摘要： A track on the disk is divided into plural concentric zones on the radial position thereof. During recording, the angular velocity varies according to the zones accessed for recording, and the disk is driven at a rotational velocity whereby the angular velocity is constant within any single zone but decreases as the radial position of the zone of the accessed track approaches the outside circumference of the disk. During reproducing, the disk is driven at a rotational velocity whereby the angular velocity is constant in all zones. The range of change in the relative linear velocity of the head to the track is thus smaller and the change in the recording conditions is less during recording. During reproducing, there is no delay time required for rotational control of the disk, and the desired track can be more quickly accessed.

摘要翻译： 磁盘上的轨道在其径向位置被分成多个同心区域。 在记录期间，角速度根据被记录的区域而变化，并且以旋转速度驱动盘，其中角速度在任何单个区域内是恒定的，但随着被访问的轨道的区域的径向位置接近外部而减小 盘的周长。 在再现期间，以旋转速度驱动盘，其中角速度在所有区域中是恒定的。 因此，磁头与磁道的相对线速度的变化范围变小，记录时记录条件的变化较小。 在再现期间，不需要用于盘的旋转控制的延迟时间，并且可以更快速地访问期望的轨道。

公开(公告)号：US5424106A

公开(公告)日：1995-06-13

申请号：US45876

申请日：1993-04-15

申请人： Noboru Yamada ,  Nobuo Akahira ,  Kenichi Nishiuchi ,  Kenichi Nagata ,  Eiji Ohno ,  Shigeaki Furukawa

发明人： Noboru Yamada ,  Nobuo Akahira ,  Kenichi Nishiuchi ,  Kenichi Nagata ,  Eiji Ohno ,  Shigeaki Furukawa

IPC分类号： G11B7/006 ,  G11B7/24 ,  B32B3/00

CPC分类号： G11B7/006 ,  G11B7/24 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21 ,  Y10T428/31678

摘要： Phase-change-type optical recording medium comprises a first dielectric layer, a recording layer made of a phase change material, a second dielectric layer and a reflecting layer wherein the thicknesses of the first and second dielectric layers are determined for a given thickness of the recording layer so that the following conditions are satisfied;.DELTA.A+.DELTA.R.gtoreq.20% and .DELTA.A.gtoreq.5%wherein.DELTA.A=A(cry)-A(amo),A(cry), A(amo): light absorption rates of the recording layer in the crystal state and amorphous state, respectively,.DELTA.R=R(cry)-R(amo),R(cry) and R(amo): light reflection rates of the recording lates in the crystal state and amorphous state, respectively.

摘要翻译： 相变型光学记录介质包括第一介质层，由相变材料制成的记录层，第二介电层和反射层，其中确定第一和第二介电层的厚度为给定的厚度 记录层，以满足以下条件; DELTA A + DELTA R> / = 20％和DELTA A> / = 5％其中DELTA A = A（cry）-A（amo），A（cry），A（amo）：记录层的光吸收率 晶体状态和非晶态分别为：晶体状态和非晶态的记录层的光反射率分别为：DELTA R = R（cry）-R（amo），R（cry）和R（amo）

公开(公告)号：US5527661A

公开(公告)日：1996-06-18

申请号：US512131

申请日：1995-08-07

申请人： Nobuo Akahira ,  Eiji Ohno ,  Kenichi Nishiuchi ,  Kenichi Nagata ,  Yoshitaka Sakaue ,  Noboru Yamada

发明人： Nobuo Akahira ,  Eiji Ohno ,  Kenichi Nishiuchi ,  Kenichi Nagata ,  Yoshitaka Sakaue ,  Noboru Yamada

IPC分类号： G11B7/005 ,  G11B7/24 ,  G11B7/243

CPC分类号： G11B7/24 ,  G11B7/0051 ,  G11B7/243 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B7/00557 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2595 ,  Y10S430/146

摘要： An optical recording medium according to the present invention includes a substrate, and a recording film formed on the substrate, when receiving a laser beam for recording, the recording film taking either a first structural state or a second structural state according to the intensity of the laser beam; when receiving a laser beam for reproducing, the recording film partially changing the optical phase of the laser beam for reproducing according to the structural state, thereby changing the intensity of the laser beam for reproducing, wherein the optical absorbance of the recording film in the first structural state is substantially equal to that of the recording film in the second structural state, and the refractive index of the recording film in the first structural state is substantially different from that of the recording film in the second structural state.

摘要翻译： 根据本发明的光记录介质包括基板和形成在基板上的记录膜，当接收用于记录的激光束时，根据记录膜的强度采用第一结构状态或第二结构状态的记录膜 激光束; 当接收到用于再现的激光束时，记录膜根据结构状态部分地改变用于再现的激光束的光学相位，由此改变用于再现的激光束的强度，其中记录膜在第一 结构状态基本上等于第二结构状态下的记录膜的结构状态，并且在第一结构状态下的记录膜的折射率与第二结构状态下的记录膜的折射率基本不同。

公开(公告)号：US4839883A

公开(公告)日：1989-06-13

申请号：US66229

申请日：1987-06-25

申请人： Kenichi Nagata ,  Noboru Yamada

发明人： Kenichi Nagata ,  Noboru Yamada

IPC分类号： G11B7/258 ,  G11B7/2595

CPC分类号： G11B7/258 ,  G11B7/2595 ,  Y10S430/146

摘要： There is provided a rewritable tri-layer optical information recording medium of the phase change type having a high sensitivity. In this medium, a reflective layer is formed by a thin film of an Ni-Cr alloy or an Au-Cr alloy.

公开(公告)号：US5811217A

公开(公告)日：1998-09-22

申请号：US257470

申请日：1994-06-09

申请人： Nobuo Akahira ,  Kenichi Nagata ,  Eiji Ohno ,  Kenichi Nishiuchi ,  Noboru Yamada

发明人： Nobuo Akahira ,  Kenichi Nagata ,  Eiji Ohno ,  Kenichi Nishiuchi ,  Noboru Yamada

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/24 ,  G11B7/241 ,  G11B7/254 ,  G11B7/257

CPC分类号： G11B7/24 ,  G11B7/00454 ,  Y10S430/146

摘要： An optical information recording medium, which includes a substrate, and a recording thin film layer provided on the base material and adapted to form variation in an amount optically detectable by absorbing at least laser light so as to record information by partially varying the recording thin film layer and to reproduce the information by optically detecting the variation amount. The optical information recording medium further includes transparent layers each provided in contact with the recording thin film layer, and each of the transparent layers has optical thickness in which, in at least two different wavelengths .lambda., integral multiple of .lambda./2 is added to the thickness giving the large laser light absorption and large optical variation amount, respectively. More specifically, the optically detectable amount is of a reflectance factor variation, and in the different wavelengths .lambda.1 and .lambda.2, with respect to the thicknesses d1 and d2 of the transparent layers which give the optical characteristic more than 60% in the absorption, and more than 20% in the reflectance factor variation, the thickness of each transparent layer is arranged to be the thickness d having relation as represented by a following equation. d=d1+(.lambda.1/2).times.m=d2+(.lambda.2/2).times.1 (m, l: positive integer or zero).

摘要翻译： 一种光学信息记录介质，其包括基板和设置在基材上的记录薄膜层，并且适于通过至少吸收激光来形成光学上可检测的量的变化，以便通过部分地改变记录薄膜来记录信息 并通过光学检测变化量再现信息。 光学信息记录介质还包括各自设置成与记录薄膜层接触的透明层，并且每个透明层具有光学厚度，其中在至少两个不同波长λ中的λ/ 2的整数倍被添加到 分别赋予大的激光吸收和大的光学变化量的厚度。 更具体地说，光学上可检测的量是反射率变化，并且在不同波长λ1和λ2中，相对于在吸收中给出大于60％的光学特性的透明层的厚度d1和d2， 和反射系数变化大于20％时，每个透明层的厚度被设置为具有如以下等式表示的关系的厚度d = d1 +（λ+ E，fra 1/2 + EE）xm = d2 +（λ+ E，fra 2/2 + EE）x1（m，l：正整数或零）。

公开(公告)号：US5729513A

公开(公告)日：1998-03-17

申请号：US438501

申请日：1995-05-10

申请人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Eiji Ohno ,  Kenichi Nagata ,  Noboru Yamada

发明人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Eiji Ohno ,  Kenichi Nagata ,  Noboru Yamada

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/007 ,  G11B19/12 ,  G11B19/247 ,  G11B19/26 ,  G11B19/28 ,  G11B20/12

CPC分类号： G11B7/00454 ,  G11B19/26 ,  G11B7/0079 ,  G11B7/00745

摘要： A track on the disk is divided into plural concentric zones on the radial position thereof. During recording, the angular velocity varies according to the zones accessed for recording, and the disk is driven at a rotational velocity whereby the angular velocity is constant within any single zone but decreases as the radial position of the zone of the accessed track approaches the outside circumference of the disk. During reproducing, the disk is driven at a rotational velocity whereby the angular velocity is constant in all zones. The range of change in the relative linear velocity of the head to the track is thus smaller and the change in the recording conditions is less during recording. During reproducing, there is no delay time required for rotational control of the disk, and the desired track can be more quickly accessed.

摘要翻译： 磁盘上的轨道在其径向位置被分成多个同心区域。 在记录期间，角速度根据被记录的区域而变化，并且以旋转速度驱动盘，其中角速度在任何单个区域内是恒定的，但随着被访问的轨道的区域的径向位置接近外部而减小 盘的周长。 在再现期间，以旋转速度驱动盘，其中角速度在所有区域中是恒定的。 因此，磁头与磁道的相对线速度的变化范围变小，记录时记录条件的变化较小。 在再现期间，不需要用于盘的旋转控制的延迟时间，并且可以更快速地访问期望的轨道。

公开(公告)号：US6146734A

公开(公告)日：2000-11-14

申请号：US459453

申请日：1999-12-13

申请人： Eiji Ohno ,  Yoshitaka Sakaue ,  Kenichi Nagata ,  Nobuo Akahira ,  Masahide Yokoyama ,  Hiroshi Hayata ,  Noboru Yamada

发明人： Eiji Ohno ,  Yoshitaka Sakaue ,  Kenichi Nagata ,  Nobuo Akahira ,  Masahide Yokoyama ,  Hiroshi Hayata ,  Noboru Yamada

IPC分类号： C23C14/34 ,  C23C14/35 ,  G11B7/243 ,  G11B7/26 ,  B32B3/02

CPC分类号： G11B7/243 ,  C23C14/3414 ,  C23C14/3464 ,  G11B7/26 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/21

摘要： The present invention is to provide a method for manufacturing the PCE optical information recording disk under control of not only the crystallization velocity but also the complex index of refraction and thus the reflectance on the disk surface.The PCE optical information recording disk is suitable to be used under the constant angular velocity (the constant rotational numbers wherein the disk has a characteristic that the crystallization velocity is designed to become faster from inside area of the disk to outside area in the radical direction thereof under control of not only the crystallization velocity but also the complex index of refraction and thus the reflectance on the disk surface.In the case of mass production and high film formation to be required, the present invention provides an effective method for manufacturing the optical disk by means of sputtering from at least two targets at the same time in a manner that the crystallization velocity is increased in a radial direction from inside area to outside area in the disk.

摘要翻译： 本发明提供一种用于制造PCE光学信息记录盘的方法，该方法不仅可以控制结晶速度，而且可以控制复合折射率，从而在盘表面上的反射率。 PCE光学信息记录盘适用于以恒定角速度（其中盘具有结晶速度设计成从盘的内部区域到其沿自由度方向的外部区域变得更快的特性的恒定角速度 不仅可以控制结晶速度，而且可以控制复杂的折射率，从而提高光盘表面的反射率。在大量生产和需要高成膜的情况下，本发明提供了一种制造光盘的有效方法 通过同时从至少两个靶的溅射以使得结晶速度在盘的内部区域到外部区域的径向方向上增加的方式。

公开(公告)号：US5956308A

公开(公告)日：1999-09-21

申请号：US986492

申请日：1997-12-08

申请人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Eiji Ohno ,  Kenichi Nagata ,  Noboru Yamada

发明人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Eiji Ohno ,  Kenichi Nagata ,  Noboru Yamada

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/007 ,  G11B19/12 ,  G11B19/247 ,  G11B19/26 ,  G11B19/28 ,  G11B20/12

CPC分类号： G11B7/00454 ,  G11B19/26 ,  G11B7/0079 ,  G11B7/00745

摘要： A track on the disk is divided into plural concentric zones on the radial position thereof. During recording, the angular velocity varies according to the zones accessed for recording, and the disk is driven at a rotational velocity whereby the angular velocity is constant within any single zone but decreases as the radial position of the zone of the accessed track approaches the outside circumference of the disk. During reproducing, the disk is driven at a rotational velocity whereby the angular velocity is constant in all zones. The range of change in the relative linear velocity of the head to the track is thus smaller and the change in the recording conditions is less during recording. During reproducing, there is no delay time required for rotational control of the disk, and the desired track can be more quickly accessed.

摘要翻译： 磁盘上的轨道在其径向位置被分成多个同心区域。 在记录期间，角速度根据被记录的区域而变化，并且以旋转速度驱动盘，其中角速度在任何单个区域内是恒定的，但随着被访问的轨道的区域的径向位置接近外部而减小 盘的周长。 在再现期间，以旋转速度驱动盘，其中角速度在所有区域中是恒定的。 因此，磁头与磁道的相对线速度的变化范围变小，记录时记录条件的变化较小。 在再现期间，不需要用于盘的旋转控制的延迟时间，并且可以更快速地访问期望的轨道。

公开(公告)号：US5505835A

公开(公告)日：1996-04-09

申请号：US199550

申请日：1994-02-22

申请人： Yoshitaka Sakaue ,  Eiji Ohno ,  Kazuhisa Ide ,  Kenichi Nagata ,  Noboru Yamada

发明人： Yoshitaka Sakaue ,  Eiji Ohno ,  Kazuhisa Ide ,  Kenichi Nagata ,  Noboru Yamada

IPC分类号： C23C14/06 ,  C23C14/34 ,  G11B7/24 ,  G11B7/243 ,  G11B7/257 ,  G11B7/26

CPC分类号： G11B7/243 ,  C23C14/06 ,  C23C14/34 ,  G11B7/24 ,  G11B7/257 ,  G11B7/26

摘要： In forming steps of a recording layer or a dielectric layer of a phase change type optical disk by sputtering, a discharge gas which includes at least one of Kr gas and Xe gas is used. Alternatively, at least one of Ar gas and N.sub.2 gas may be further added to the discharge gas. Forming the recording layer or the dielectric layer of the phase change type optical disk in these discharge gases enables preventing of the introduction of the discharge gas into each layer during the forming steps. As a result, the void generation and growth in the recording layer is suppressed. Consequently, the deterioration of the cycle life characteristics due to repeated overwrite operations can be restrained. Therefore, high reliability and long life of the phase change type optical disk is attained.

摘要翻译： 在通过溅射形成相变型光盘的记录层或电介质层的步骤中，使用包括Kr气体和Xe气体中的至少一种的放电气体。 或者，可以进一步向放电气体中添加Ar气体和N 2气体中的至少一种。 在这些放电气体中形成相变型光盘的记录层或电介质层能够防止在成形步骤期间将放电气体引入各层。 结果，抑制了记录层中的空隙生成和生长。 因此，可以抑制由于重复的重写操作引起的循环寿命特性的劣化。 因此，可以实现相变型光盘的高可靠性和长寿命。