专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

91. 发明授权

US07151641B2 Magnetic transfer master medium, magnetic transfer method, and magnetic transfer master medium forming method 失效
公开(公告)号：US07151641B2
公开(公告)日：2006-12-19
申请号：US10843591
申请日：2004-05-12
申请人： Masakazu Nishikawa , Kazunori Komatsu
发明人： Masakazu Nishikawa , Kazunori Komatsu
IPC分类号： G11B5/86 , G11B5/64
CPC分类号： G11B5/865 , G11B5/56 , Y10T428/12993
摘要： A favorable magnetic transfer is performed to a perpendicular magnetic recording medium. A master medium is provided with a substrate on the surface of which protrusion portions, which form a pattern corresponding to the data that is to be transferred, having a pliable layer thereon have been formed. The master medium is further provided with a soft magnetic layer formed in the depression portions between the protrusion portions, and which is magnetically linked to the soft magnetic layer of the protrusion portions. The soft magnetic layer of the surface of the protrusion portions is conjoined with the magnetic recording layer of a perpendicular magnetic recording medium to form a conjoined body, and a transfer magnetic field is applied to the conjoined body in the direction from the substrate of the master medium toward the slave medium to perform the magnetic transfer.

92. 发明申请

US20060146430A1 Master carrier for magnetic transfer, inspecting method thereof, and magnetic recording medium producing method 失效
公开(公告)号：US20060146430A1
公开(公告)日：2006-07-06
申请号：US11366411
申请日：2006-03-03
申请人： Masakazu Nishikawa , Naoto Fujiwara
发明人： Masakazu Nishikawa , Naoto Fujiwara
IPC分类号： G11B5/65 , G11B5/86 , G11B5/64
CPC分类号： B82Y10/00 , G11B5/743 , G11B5/82 , G11B5/865 , G11B33/10 , Y10T428/31808
摘要： In a master carrier for magnetic transfer which comprises a support that has a transfer-recording pattern arrayed in the track direction thereof in accordance with the information to be transferred to a magnetic recording medium, and a magnetic layer formed on the transfer-recording pattern of the support, the in-plane distance L (mm) between the hill and the valley of the warped master carrier, the vertical-direction distance H (μm) between the two, and the thickness d (mm) of the master carrier are so defined that they satisfy a relation of 0.05≦H·d3/L≦0.6.

93. 发明授权

US07054082B2 Magnetic transfer method for a high-density magnetic recording medium 失效
公开(公告)号：US07054082B2
公开(公告)日：2006-05-30
申请号：US10163370
申请日：2002-06-07
申请人： Masakazu Nishikawa , Tadashi Yasunaga
发明人： Masakazu Nishikawa , Tadashi Yasunaga
IPC分类号： G11B5/86
CPC分类号： G11B5/865 , G11B5/59633 , G11B5/82
摘要： An accurate magnetic transfer to a high-density slave medium having two magnetic layers and utilizing antiferromagnetic coupling is performed. By applying a first magnetic field that causes both the first and second magnetic layers of the magnetic layer of a slave medium to reach saturation magnetization unidirectionally along the circumferential direction of the track, the first and second magnetic layers are magnetized uniformly in the same direction as the first magnetic field. Then, a second magnetic field that inverts the magnetization of the first magnetic layer and has no effect on the magnetization of the second magnetic layer is applied in the opposite direction, whereby only the magnetization direction of the first magnetic layer is inverted in the direction of the second magnetic field. Thereby, a favorable initial magnetization state in which the magnetization directions of the first and second magnetic layers are oriented antiparallel can be obtained.

94. 发明授权

US06954317B2 Magnetic transfer method and apparatus 失效
标题翻译：磁转移方法及装置
公开(公告)号：US06954317B2
公开(公告)日：2005-10-11
申请号：US10059259
申请日：2002-01-31
申请人： Masashi Aoki , Kazunori Komatsu , Masakazu Nishikawa , Junichi Nakamikawa
发明人： Masashi Aoki , Kazunori Komatsu , Masakazu Nishikawa , Junichi Nakamikawa
IPC分类号： G11B5/596 , G11B5/82 , G11B5/86 , G11B5/84
CPC分类号： G11B5/865 , G11B5/59633 , G11B5/82
摘要： When a master medium and a slave medium are brought into close contact and a transfer magnetic field is applied thereto to perform magnetic transfer, the leakage magnetic field intensity of the transfer magnetic field is regulated to within a permissible range, making possible the transfer of an exact magnetic pattern. After a magnetic field is applied to the slave face in the track direction thereof to initially magnetize the slave medium in the track direction, the master medium and the slave medium are brought into close contact. When applying a transfer magnetic field in the track direction of the slave face to perform a magnetic transfer, the magnetic field intensity component in the direction opposite that in which the transfer magnetic field is to be applied is regulated to less than or equal to ½ the magnetic coercive force Hcs of the slave medium over the entire slave surface.
摘要翻译：当主介质和从属介质紧密接触并且传递磁场被施加到其上以执行磁传递时，传递磁场的泄漏磁场强度被调节在允许的范围内，使得可以传输精确的磁性图案。在从动面向跟踪方向施加磁场以使磁道方向最初磁化时，使主介质和从属介质紧密接触。当在从动面的轨道方向上施加转移磁场以进行磁转移时，将要施加转印磁场的方向相反的方向的磁场强度分量调节到小于或等于½的1/2 从属介质的磁矫顽力Hcs在整个从动面上。

95. 发明申请

US20050213372A1 Method and apparatus for magnetic transfer, and magnetic recording medium 失效
标题翻译：用于磁转移的方法和装置以及磁记录介质
公开(公告)号：US20050213372A1
公开(公告)日：2005-09-29
申请号：US11087669
申请日：2005-03-24
申请人： Masakazu Nishikawa
发明人： Masakazu Nishikawa
IPC分类号： G11B5/82 , G11B5/00 , G11B5/012 , G11B5/86 , G11C11/00
CPC分类号： G11B5/865 , G11B5/012 , G11B5/82 , G11B2005/001
摘要： A magnetic pattern, in which errors due to sub-pulses do not occur during signal reproduction, is transferred from a magnetic transfer master carrier. A magnetic field is applied to a conjoined body, formed by the master carrier bearing a transfer pattern corresponding to desired information and a discoid transfer medium. A magnetic transfer apparatus that includes magnetic field applying means having magnetic poles that extend from the interior to the outer periphery of the conjoined body, and rotating means for relatively rotating the conjoined body with respect to the magnetic poles is employed. The magnetic poles are provided such that a distance d, between end surfaces of the magnetic poles and the conjoined body decrease from the interior to the outer periphery of the conjoined body. Magnetic transfer is performed employing the magnetic field, the intensity of which increases from the interior to the outer periphery of the transfer medium.
摘要翻译：从磁传输主载波传送在信号再现期间不发生由子脉冲引起的误差的磁图。将磁场施加到由承载具有对应于期望信息的传送图案的主载体形成的结合体和盘状转印介质。采用磁性传送装置，其包括具有从结合体的内部延伸到外周的磁极的磁场施加装置，以及用于使结合体相对于磁极相对旋转的旋转装置。磁极设置成使得磁极端面和结合体之间的距离d从结合体的内部到外周减小。使用磁场进行磁转移，其强度从转印介质的内部至外周增加。

96. 发明申请

US20050200991A1 Magnetic transfer method and apparatus 失效
公开(公告)号：US20050200991A1
公开(公告)日：2005-09-15
申请号：US11109710
申请日：2005-04-20
申请人： Kazunori Komatsu , Masakazu Nishikawa
发明人： Kazunori Komatsu , Masakazu Nishikawa
IPC分类号： G11B5/596 , G11B5/82 , G11B5/86
CPC分类号： G11B5/865 , G11B5/59633 , G11B5/82
摘要： A favorable magnetic transfer is, performed on a perpendicular magnetic recording medium. A permanent magnet apparatus provided with two permanent magnets, each having a width extending the length of the radial direction of a discoid magnetic recording medium, is used as a transfer magnetic field generating means. A conjoined body formed of the perpendicular magnetic recording medium, which has been initially magnetized unidirectionally in the direction perpendicular to the track surface thereof, and two master mediums, disposed on respective surfaces of the slave medium, is inserted between the permanent magnets. A rotating means rotates the conjoined body, in the direction along the tracks of the slave medium, while a transfer magnetic field is applied to the conjoined body in the direction substantially opposite that in which the initial magnetization of the magnetic layer of magnetic recording medium has been performed, so as to perform the magnetic transfer.

97. 发明申请

US20050195509A1 Magnetic transfer method and apparatus 审中-公开
标题翻译：磁转移方法及装置
公开(公告)号：US20050195509A1
公开(公告)日：2005-09-08
申请号：US11109730
申请日：2005-04-20
申请人： Kazunori Komatsu , Masakazu Nishikawa
发明人： Kazunori Komatsu , Masakazu Nishikawa
IPC分类号： G11B5/596 , G11B5/82 , G11B5/86
CPC分类号： G11B5/865 , G11B5/59633 , G11B5/82
摘要： A favorable magnetic transfer is, performed on a perpendicular magnetic recording medium. A permanent magnet apparatus provided with two permanent magnets, each having a width extending the length of the radial direction of a discoid magnetic recording medium, is used as a transfer magnetic field generating means. A conjoined body formed of the perpendicular magnetic recording medium, which has been initially magnetized unidirectionally in the direction perpendicular to the track surface thereof, and two master mediums, disposed on respective surfaces of the slave medium, is inserted between the permanent magnets. A rotating means rotates the conjoined body, in the direction along the tracks of the slave medium, while a transfer magnetic field is applied to the conjoined body in the direction substantially opposite that in which the initial magnetization of the magnetic layer of magnetic recording medium has been performed, so as to perform the magnetic transfer.
摘要翻译：在垂直磁记录介质上进行有利的磁转移。具有两个永久磁铁的永久磁铁装置用作转移磁场产生装置，每个永磁体具有延伸盘形磁记录介质径向长度的宽度。由垂直磁记录介质形成的连接体被插入在永磁体之间，该垂直磁记录介质最初在与其轨道表面垂直的方向上单向磁化，并且设置在从属介质的相应表面上的两个主介质。旋转装置沿着从属介质的轨道的方向旋转结合体，同时传递磁场以与磁记录介质的磁性层的初始磁化强度基本相反的方向施加到结合体进行磁转移。

98. 发明授权

US06819511B2 Magnetic transfer method and magnetic recording medium 失效
标题翻译：磁转移方式和磁记录介质
公开(公告)号：US06819511B2
公开(公告)日：2004-11-16
申请号：US09855801
申请日：2001-05-16
申请人： Masakazu Nishikawa
发明人： Masakazu Nishikawa
IPC分类号： G11B586
CPC分类号： G11B5/865
摘要： The invention provides a method for performing magnetic transfer by bringing a master carrier for magnetic transfer and a slave medium in close contact with each other and by applying a magnetic field for transfer, whereby a product (Ms1&dgr;1) of saturation magnetization (Ms1) and film thickness (&dgr;1) of a magnetic layer of the master carrier to be used for magnetic transfer on a surface of the slave medium with earlier magnetic transfer and a product (Ms2&dgr;2) of saturation magnetization (Ms2) and film thickness (&dgr;2) of a magnetic layer of the master carrier are in a relation of: 1.5
摘要翻译：本发明提供一种用于通过使用于磁转移的主载体和从属介质彼此紧密接触并且通过施加用于传送的磁场来执行磁转移的方法，由此产生饱和磁化（Ms1）和膜的Ms1delta1 用于磁传递的主载体的磁性层的磁性层的厚度（delta1）在具有较早磁性传递的从属介质的表面上以及饱和磁化强度（Ms2）和磁体厚度（δ2）的乘积（Ms2delta2）主载体的层的关系为：1.5 <（MS2delta2）/（Ms1delta1）<10，以及在较早的磁转移下施加到具有传递磁场（Hdu2）的表面上的传递磁场（Hdu1）具有随后磁转移的从属介质的表面的关系为：0.2 <= HDU2 / Hdu1 <= 0.9。

99. 发明授权

US06802321B2 Master medium cleaning method 失效
标题翻译：主介质清洗方法
公开(公告)号：US06802321B2
公开(公告)日：2004-10-12
申请号：US10146913
申请日：2002-05-17
申请人： Akito Kamatani , Masakazu Nishikawa
发明人： Akito Kamatani , Masakazu Nishikawa
IPC分类号： C25F500
CPC分类号： G11B23/505 , G11B5/865 , Y10T156/1922
摘要： The foreign matter adhered to the data bearing surface of a master medium is removed by use of a dry, non-contact removal process, so as to facilitate the performance of a high transfer quality magnetic transfer. Before performing a magnetic transfer or forming an optical disk, a magnetic transfer master medium or an optical disk master medium is placed in a vacuum chamber. The vacuum chamber is evacuated by an evacuating means, and a reactive gas is introduced thereto by a gas introducing means. In the state in which the chamber has been evacuated and the reactive gas has been introduced thereto, a discharging means applies a discharge voltage in the chamber, causing a plasma discharge to be generated between the master medium and an electrode. The plasma etching action of the plasma discharge burns off the foreign matter adhered to the surface of the master medium.
摘要翻译：通过使用干燥的非接触去除工艺去除附着在主介质的数据承载表面上的异物，以便促进高转印质量磁转印的性能。在执行磁转移或形成光盘之前，将磁转移母介质或光盘主介质放置在真空室中。真空室由排气装置抽真空，气体导入装置将反应性气体引入其中。在室被抽真空并且反应性气体已经被引入的状态下，放电装置在室中施加放电电压，从而在主介质和电极之间产生等离子体放电。等离子体放电的等离子体蚀刻作用消除了附着在主介质表面上的异物。

100. 发明授权

US06790534B2 Magnetic transfer master medium, magnetic transfer method, and magnetic transfer master medium forming method 失效
公开(公告)号：US06790534B2
公开(公告)日：2004-09-14
申请号：US10146888
申请日：2002-05-17
申请人： Masakazu Nishikawa , Kazunori Komatsu
发明人： Masakazu Nishikawa , Kazunori Komatsu
IPC分类号： G11B5012
CPC分类号： G11B5/865 , G11B5/56 , Y10T428/12993
摘要： A favorable magnetic transfer is performed to a perpendicular magnetic recording medium. A master medium is provided with a substrate on the surface of which protrusion portions, which form a pattern corresponding to the data that is to be transferred, having a pliable layer thereon have been formed. The master medium is further provided with a soft magnetic layer formed in the depression portions between the protrusion portions, and which is magnetically linked to the soft magnetic layer of the protrusion portions. The soft magnetic layer of the surface of the protrusion portions is conjoined with the magnetic recording layer of a perpendicular magnetic recording medium to form a conjoined body, and a transfer magnetic field is applied to the conjoined body in the direction from the substrate of the master medium toward the slave medium to perform the magnetic transfer.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式