公开(公告)号：US06865039B2

公开(公告)日：2005-03-08

申请号：US10101369

申请日：2002-03-20

申请人： Shingo Hamaguchi ,  Sumio Kuroda ,  Kazuyuki Ozaki ,  Ken Tamanoi ,  Koji Matsumoto

发明人： Shingo Hamaguchi ,  Sumio Kuroda ,  Kazuyuki Ozaki ,  Ken Tamanoi ,  Koji Matsumoto

IPC分类号： G11B5/65 ,  G11B5/66 ,  G11B5/84 ,  G11B5/86

CPC分类号： G11B5/66 ,  G11B5/865

摘要： A master medium for magnetic transfer includes a substrate having a concave portion formed in its surface corresponding to a pattern of recorded information to be transferred; a first perpendicular ferromagnetic layer deposited in the concave portion; and a second perpendicular ferromagnetic layer layered on the substrate surface and the first perpendicular ferromagnetic layer surface. The substrate surface and the first perpendicular ferromagnetic layer surface are flattened to form a single flat surface. In the master medium for magnetic transfer, a magnetic field change in a direction parallel to the substrate surface at a magnetization boundary of the first perpendicular ferromagnetic layer is steep. Since the influence of the change of an external magnetic field is reduced, it is possible to perform accurate transfer from the master medium for magnetic transfer to a slave medium for magnetic recording.

摘要翻译： 用于磁转移的主介质包括在其表面上形成有与要传送的记录信息的图案相对应的凹部的基板; 沉积在凹部中的第一垂直铁磁层; 以及层叠在基板表面和第一垂直铁磁层表面上的第二垂直铁磁层。 衬底表面和第一垂直铁磁层表面被平坦化以形成单个平坦表面。 在用于磁转移的主介质中，在第一垂直铁磁层的磁化边界处，平行于衬底表面的方向上的磁场变化是陡峭的。 由于外部磁场的变化的影响减小，因此能够从用于磁性传递的主介质到用于磁记录的从属介质的精确传送。

公开(公告)号：US06356516B2

公开(公告)日：2002-03-12

申请号：US09732092

申请日：2000-12-07

申请人： Ken Tamanoi ,  Keiji Shono ,  Sumio Kuroda ,  Motonobu Mihara ,  Koji Matsumoto

发明人： Ken Tamanoi ,  Keiji Shono ,  Sumio Kuroda ,  Motonobu Mihara ,  Koji Matsumoto

IPC分类号： G11B1100

CPC分类号： G11B11/10584 ,  G11B11/10515 ,  G11B11/10593 ,  Y10S428/90 ,  Y10T428/12861 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium capable of perfectly masking a mark adjacent to a mark to be reproduced thereby improvng reproduction output. The magneto-optical recording medium includes a transparent substrate, a magnetic reproducing layer laminated on the transparent substrate, a nonmagnetic intermediate layer laminated on the magnetic reproducing layer, and a magnetic recording layer laminated on the nonmagnetic intermediate layer. The reproducing layer has an easy direction of magnetization in a plane at room temperature, and has an easy direction of magnetization perpendicular to a film surface at a given temperature or higher. The nonmagnetic intermediate layer is thin enough to allow magnetostatic bond between the recording layer and the reproducing layer at the given temperature or higher. Instead of the nonmagnetic intermediate layer, a magnetic intermediate layer having an easy direction of magnetization in a plane from room temperature to its Curie temperature may be interposed between the reproducing layer and the recording layer.

摘要翻译： 一种磁光记录介质，其能够完美地掩蔽与要再现的标记相邻的标记，从而提高再现输出。 磁光记录介质包括透明基板，层叠在透明基板上的磁性再现层，层叠在磁性再现层上的非磁性中间层以及层叠在非磁性中间层上的磁记录层。 再现层在室温下在平面中具有容易的磁化方向，并且在给定温度或更高温度下具有与膜表面垂直的易磁化方向。 非磁性中间层足够薄，以允许在给定温度或更高温度下记录层和再生层之间的静磁结合。 代替非磁性中间层，可以在再现层和记录层之间插入在从室温到其居里温度的平面中具有容易的磁化方向的磁性中间层。

公开(公告)号：US06248439B1

公开(公告)日：2001-06-19

申请号：US08368607

申请日：1995-01-04

申请人： Ken Tamanoi ,  Keiji Shono ,  Sumio Kuroda ,  Motonobu Mihara ,  Koji Matsumoto

发明人： Ken Tamanoi ,  Keiji Shono ,  Sumio Kuroda ,  Motonobu Mihara ,  Koji Matsumoto

IPC分类号： G11B566

CPC分类号： G11B11/10584 ,  G11B11/10515 ,  G11B11/10593 ,  Y10S428/90 ,  Y10T428/12861 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium capable of perfectly masking a mark adjacent to a mark to be reproduced thereby improving a reproduction output. The magneto-optical recording medium includes a transparent substrate, a magnetic reproducing layer laminated on the transparent substrate, a nonmagnetic intermediate layer laminated on the magnetic reproducing layer, and a magnetic recording layer laminated on the nonmagnetic intermediate layer. The reproducing layer has an easy direction of magnetization in a plane at room temperature, and has an easy direction of magnetization perpendicular to a film surface at a given temperature or higher. The nonmagnetic intermediate layer is thin enough to allow magnetostatic bond between the recording layer and the reproducing layer at the given temperature or higher. Instead of the nonmagnetic intermediate layer, a magnetic intermediate layer having an easy direction of magnetization in a plane from room temperature to its Curie temperature may be interposed between the reproducing layer and the recording layer.

摘要翻译： 一种磁光记录介质，其能够完美地掩蔽与要再现的标记相邻的标记，从而改善再现输出。 磁光记录介质包括透明基板，层叠在透明基板上的磁性再现层，层叠在磁性再现层上的非磁性中间层以及层叠在非磁性中间层上的磁记录层。 再现层在室温下在平面中具有容易的磁化方向，并且在给定温度或更高温度下具有与膜表面垂直的易磁化方向。 非磁性中间层足够薄，以允许在给定温度或更高温度下记录层和再生层之间的静磁结合。 代替非磁性中间层，可以在再现层和记录层之间插入在从室温到其居里温度的平面中具有容易的磁化方向的磁性中间层。

公开(公告)号：US5599605A

公开(公告)日：1997-02-04

申请号：US045737

申请日：1993-04-14

申请人： Keiji Shono ,  Ken Tamanoi ,  Sumio Kuroda ,  Koji Matsumoto

发明人： Keiji Shono ,  Ken Tamanoi ,  Sumio Kuroda ,  Koji Matsumoto

IPC分类号： G11B11/10 ,  G11B7/253 ,  G11B11/105 ,  H01F10/24 ,  H01F41/18 ,  G11B5/66 ,  B32B3/10

CPC分类号： G11B7/253 ,  G11B11/10582 ,  G11B11/10586 ,  G11B11/10593 ,  Y10S428/90 ,  Y10T428/24355

摘要： A magneto-optical recording medium having a recording layer made of a bismuth-substituted garnet and deposited by a sputtering over an amorphous substrate of aluminosilicate or borosilicate glass, the recording medium including a garnet underlayer of either a double-layer or single-layer structure. The formation of an underlayer of a double-layer structure made of garnet reduces the level of noise due to light scattering at crystalline boundaries in the garnet film. The formation of an underlayer of a single-layer structure made of a garnet having a lower crystallization temperature than a YIG film is also effective to noise-level reduction. An underlayer has a surface smoothness corresponding to a roughness of approximately 10 .ANG., which is improved from the surface smoothness of a conventional underlayer comprising a YIG film.

摘要翻译： 一种具有由铋取代的石榴石制成的记录层并通过溅射沉积在硅铝酸盐或硼硅酸盐玻璃的无定形基底上的磁光记录介质，所述记录介质包括双层或单层结构的石榴石底层 。 由石榴石制成的双层结构的底层的形成降低了由于在石榴石膜中的结晶边界处的光散射引起的噪声水平。 由具有比YIG膜低的结晶温度的石榴石制成的单层结构的底层的形成对于噪声水平的降低也是有效的。 底层具有对应于约10安培的粗糙度的表面平滑度，其从包含YIG膜的常规底层的表面平滑度得到改善。

公开(公告)号：US5747136A

公开(公告)日：1998-05-05

申请号：US309966

申请日：1994-09-20

申请人： Keiji Shono ,  Yasunobu Hashimoto ,  Sumio Kuroda ,  Ken Tamanoi

发明人： Keiji Shono ,  Yasunobu Hashimoto ,  Sumio Kuroda ,  Ken Tamanoi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10586 ,  Y10S428/90

摘要： A magneto-optic disk has a readout layer formed of a bismuth-substituted garnet having a chemical composition represented by Bi.sub.x R.sub.3-x M.sub.y Fe.sub.5-y O.sub.12 and a recording layer formed of a nonbismuth-substituted garnet having a chemical composition represented by R.sub.3 M, Fe.sub.5-z O.sub.12 (where 0.ltoreq.x.ltoreq.3, 0.ltoreq.y

摘要翻译： 磁光盘具有由具有由Bix R3-x My Fe5-yO12表示的化学组成的铋取代石榴石形成的读出层和由具有由R3 M表示的化学组成的无铋取代石榴石形成的记录层 ，Fe5-z O12（其中0

公开(公告)号：US20050243453A1

公开(公告)日：2005-11-03

申请号：US10930413

申请日：2004-08-31

申请人： Sumio Kuroda ,  Kazuyuki Ozaki

发明人： Sumio Kuroda ,  Kazuyuki Ozaki

IPC分类号： G11B5/66 ,  G11B5/738 ,  G11B5/82 ,  G11B5/86

CPC分类号： G11B5/865

摘要： A master is used for writing information to a magnetic recording disk by a magnetic transfer method. The recording disk includes a magnetic recording layer possessing vertical magnetic anisotropy. The master includes a servo zone corresponding part formed with a magnetic material pattern for recording servo information to the recording layer of the recording disk. The master also includes a user data zone corresponding part formed with a second magnetic material pattern for providing the recording layer of the recording disk with a dummy signal.

摘要翻译： 主机用于通过磁转移方式将信息写入磁记录盘。 记录盘包括具有垂直磁各向异性的磁记录层。 主机包括形成有磁性材料图案的伺服区对应部分，用于将伺服信息记录到记录盘的记录层。 主机还包括用第二磁性材料图案形成的用户数据区对应部分，用于向记录盘的记录层提供虚拟信号。

公开(公告)号：US07203023B2

公开(公告)日：2007-04-10

申请号：US10413660

申请日：2003-04-15

申请人： Sumio Kuroda ,  Kazuyuki Ozaki

发明人： Sumio Kuroda ,  Kazuyuki Ozaki

IPC分类号： G11B5/596

CPC分类号： G11B5/59605 ,  G11B5/59688

摘要： The present invention provides a magnetic recording unit, including: a magnetic head; a magnetic recording medium having a servo pattern for adjusting a position of the magnetic head; a frequency detecting element for detecting a frequency in the servo pattern on a track corresponding to the position in a radial direction of the magnetic recording medium, on the basis of a reproduction signal obtained by reading the servo pattern with the magnetic head; a storage element for storing in advance information on predetermined frequencies corresponding to the positions of tracks of the magnetic recording medium; a tracking element for comparing the frequency detected on the track by the frequency detection element and the information on the frequency corresponding to the same track, the information being stored in the storage element, and for generating a signal for adjusting the position of the magnetic head, the signal being generated on the basis of a difference between the frequencies.

摘要翻译： 本发明提供一种磁记录单元，包括：磁头; 具有用于调节磁头位置的伺服图案的磁记录介质; 频率检测元件，用于根据通过用磁头读取伺服模式获得的再现信号来检测与磁记录介质的径向方向上的位置对应的轨道上的伺服模式中的频率; 存储元件，用于预先存储与磁记录介质的轨迹位置对应的预定频率的信息; 用于将由频率检测元件在轨道上检测到的频率与对应于同一轨道的频率的信息进行比较的跟踪元件，存储在存储元件中的信息，以及用于产生用于调整磁头位置的信号 基于频率之间的差异产生信号。

公开(公告)号：US20050128617A1

公开(公告)日：2005-06-16

申请号：US11049208

申请日：2005-02-03

申请人： Sumio Kuroda ,  Kazuyuki Ozaki

发明人： Sumio Kuroda ,  Kazuyuki Ozaki

IPC分类号： G11B5/09 ,  G11B5/55 ,  G11B5/596 ,  G11B5/82 ,  G11B5/86 ,  G11B15/12 ,  G11B20/12

CPC分类号： G11B5/865 ,  G11B5/09 ,  G11B5/5526 ,  G11B5/59633 ,  G11B20/1217 ,  G11B2020/1282 ,  G11B2020/1284 ,  G11B2220/2516

摘要： An information recording medium characterized by comprising a plurality of kinds or a plurality of sets of servo information recorded as magnetic information and used for detecting a position of the information recording medium relative to a magnetic head. Even if some sets of servo information become defective, the information recording medium is not determined as a defective, and user data can be recorded and reproduced on the information recording medium by utilizing servo information of another set which is determined to be normal.

摘要翻译： 一种信息记录介质，其特征在于包括记录为磁信息的多种或多组伺服信息，用于检测信息记录介质相对于磁头的位置。 即使某些伺服信息集合变得有缺陷，信息记录介质也不被确定为缺陷，并且可以通过利用被确定为正常的另一组的伺服信息在信息记录介质上记录和再现用户数据。

公开(公告)号：US07203014B2

公开(公告)日：2007-04-10

申请号：US10632293

申请日：2003-08-01

申请人： Sumio Kuroda ,  Kazuyuki Ozaki

发明人： Sumio Kuroda ,  Kazuyuki Ozaki

IPC分类号： G11B5/09

CPC分类号： G11B20/1403 ,  G11B5/012 ,  G11B5/59616 ,  G11B5/59633 ,  G11B5/82 ,  G11B27/32 ,  G11B2220/20 ,  H03L7/093 ,  H03L7/18

摘要： The magnetic recording and reproducing apparatus reads a transfer clock synchronized with servo information and records a write-once clock pattern in a state where 0 is set as a delay time of the delay device 13 and 1 is set as the dividing ratio of the frequency divider 17. The apparatus corrects the delay time according to the output of the phase comparator 14 which changes on the basis of the phase difference and rewrites a write-once clock pattern. Rotation of the magnetic disk, detection of the phase difference and correction of the delay time are repeatedly preformed until no change occurs in the output of the phase comparator 14. After the output stops changing, preformat information patterns excluding the servo information pattern are recorded as fine patterns by changing the dividing ratio of the frequency divider 17 to multiply the frequency.

摘要翻译： 磁记录和再现装置读取与伺服信息同步的传送时钟，并将0写入延迟装置13的延迟时间的状态下记录一次写入时钟模式，并将1设置为分频器的分频比 17。 该装置根据相位比较器14的输出校正延迟时间，相位比较器14基于相位差而改变，并重写一次写入时钟模式。 重复执行磁盘的旋转，相位差的检测和延迟时间的校正，直到在相位比较器14的输出中不发生变化。 在输出停止改变之后，通过改变分频器17的分频比来乘以频率，将除伺服信息模式之外的预格式化信息模式记录为精细模式。

公开(公告)号：US07602566B2

公开(公告)日：2009-10-13

申请号：US10930413

申请日：2004-08-31

申请人： Sumio Kuroda ,  Kazuyuki Ozaki

发明人： Sumio Kuroda ,  Kazuyuki Ozaki

IPC分类号： G11B5/86

CPC分类号： G11B5/865

摘要： A master is used for writing information to a magnetic recording disk by a magnetic transfer method. The recording disk includes a magnetic recording layer possessing vertical magnetic anisotropy. The master includes a servo zone corresponding part formed with a magnetic material pattern for recording servo information to the recording layer of the recording disk. The master also includes a user data zone corresponding part formed with a second magnetic material pattern for providing the recording layer of the recording disk with a dummy signal.

摘要翻译： 主机用于通过磁转移方式将信息写入磁记录盘。 记录盘包括具有垂直磁各向异性的磁记录层。 主机包括形成有磁性材料图案的伺服区对应部分，用于将伺服信息记录到记录盘的记录层。 主机还包括用第二磁性材料图案形成的用户数据区对应部分，用于向记录盘的记录层提供虚拟信号。