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61.发明申请MASTER CARRIER FOR MAGNETIC TRANSFER, MAGNETIC TRANSFER METHOD AND MAGNETIC RECORDING MEDIUM 审中-公开磁性传输主磁带，磁性传输方法和磁记录介质公开(公告)号：US20090073593A1
公开(公告)日：2009-03-19
申请号：US12208037
申请日：2008-09-10
申请人： Naoto FUJIWARA , Makoto Nagao , Ryuji Sugita
发明人： Naoto FUJIWARA , Makoto Nagao , Ryuji Sugita
IPC分类号： G11B5/86
摘要： A master carrier for magnetic transfer includes a transfer portion on which a magnetic layer corresponding to magnetic information for transfer is formed, and a non-transfer portion forming a concave shape relatively low with respect to the transfer portion having the magnetic layer, wherein the magnetic layer of the transfer portion has perpendicular magnetic anisotropy, with residual magnetization Mr of 500 emu/cc or less, and saturation magnetization Ms of 900 emu/cc or more. CoPt can be used as a material of the magnetic layer, and use of Co4Pt1 (at %) is especially preferable. Thereby, a master carrier for magnetic transfer which can generate a high magnetic field capable of transfer of a short bit to a high density medium is provided.
摘要翻译： 用于磁转移的主载体包括其上形成有与用于传送的磁信息相对应的磁性层的转印部分和形成相对于具有磁性层的转印部分相对较低的凹形的非转印部分，其中磁性 转印部分的层具有垂直的磁各向异性，剩余磁化强度Mr为500emu / cc以下，饱和磁化强度Ms为900emu / cc以上。 CoPt可以用作磁性层的材料，特别优选使用Co4Pt1（at％）。 因此，提供了能够产生能够将短位传递到高密度介质的高磁场的用于磁转移的主载波。
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62.发明申请公开(公告)号：US20070177291A1
公开(公告)日：2007-08-02
申请号：US11699436
申请日：2007-01-30
IPC分类号： G11B5/86
摘要： The present invention provides a method of initializing a perpendicular magnetic recording medium in which a magnetic field having a magnetic field strength Hex is applied to a perpendicular magnetic recording medium having a magnetic layer having a coercive force Hc to initialize the magnetic layer, the method comprising the steps of: controlling a magnetic field strength HexP in a direction parallel to the medium surface of the magnetic field so that HexP>1.3×Hc; and controlling a magnetic field strength HexV in a direction perpendicular to the medium surface of the magnetic field so that HexV
摘要翻译： 本发明提供了一种初始化垂直磁记录介质的方法，其中具有磁场强度十六进制的磁场被施加到具有矫顽力Hc的磁性层的垂直磁记录介质，以初始化磁性层，该方法包括 步骤：在平行于磁场介质表面的方向上控制磁场强度HexP，使HexP> 1.3xHc; 并且在垂直于磁场的介质表面的方向上控制磁场强度HexV使得HexV
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63.发明申请Patterned master carrier for magnetic transfer, magnetic recording medium, and magnetic recording/reproducing apparatus 审中-公开用于磁转移的图案化主载波，磁记录介质和磁记录/再现装置公开(公告)号：US20060082913A1
公开(公告)日：2006-04-20
申请号：US11251839
申请日：2005-10-18
CPC分类号： G11B5/865
摘要： Magnetic field absorbing regions, composed of protrusions or magnetic layers, are provided in an amplitude servo transfer pattern of a patterned master carrier for magnetic transfer. The magnetic field absorbing regions are provided in intermediate tracks between burst bit elements that constitute burst bit strings, which are provided adjacent to each other in a track width direction. The amplitude servo transfer pattern in magnetically transferred onto a magnetic recording medium. Portions of the magnetic recording medium corresponding to the magnetic field absorbing regions become magnetically non-inverted regions. Therefore, noise is not recorded, and servo tracking can be favorably performed.
摘要翻译： 磁性吸收区域由突起或磁性层构成，以图形化主载体的振幅伺服转印图案提供磁传递。 磁场吸收区域设置在构成突发位串的突发位元件之间的中间轨道中，这些突发位元件沿轨道宽度方向彼此相邻地设置。 磁转移到磁记录介质上的振幅伺服转印图案。 对应于磁场吸收区域的磁记录介质的部分变成非磁性非倒置区域。 因此，不会记录噪声，可以有利地执行伺服跟踪。
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公开(公告)号：US06977786B2
公开(公告)日：2005-12-20
申请号：US10264343
申请日：2002-10-04
申请人： Kazuyuki Usuki , Masakazu Nishikawa , Makoto Nagao
发明人： Kazuyuki Usuki , Masakazu Nishikawa , Makoto Nagao
CPC分类号： G11B5/59677 , G11B5/59611 , G11B5/865
摘要： In an information recording method of the present invention by carrying out recording data while carrying out tracking servo accurately, high density recording of signals at a good S/N can be carried out, and high density recording by a vertical magnetic recording system can be carried out. A magnetic disk comprises a magnetic recording layer, and the magnetic recording layer is magnetized in advance such that magnetized regions A and B having different magnetization directions are formed. At a time of recording data, vertical magnetic recording is carried out by a magnetic head while carrying out accurate tracking servo by optically tracking by a magneto-optical effect utilizing a difference in the magnetization directions of the magnetized regions A and B. Therefore, high-density recording at a good S/N is possible.
摘要翻译： 在本发明的信息记录方法中，通过在精确地执行跟踪伺服的同时执行记录数据，可以进行具有良好S / N的信号的高密度记录，并且可以承载通过垂直磁记录系统的高密度记录 出来 磁盘包括磁记录层，磁记录层被预先磁化，从而形成磁化方向不同的磁化区域A和B. 在记录数据时，通过利用磁化区域A和B的磁化方向上的差异的磁光效应通过光学跟踪进行精确的跟踪伺服，由磁头执行垂直磁记录。因此，高 在良好的S / N下的密度记录是可能的。
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65.发明申请Process for producing magnetic recording medium with limited coercivity squareness ratio 审中-公开具有有限矫顽力矩形度的磁记录介质的制造方法公开(公告)号：US20050277000A1
公开(公告)日：2005-12-15
申请号：US11152156
申请日：2005-06-15
申请人： Makoto Nagao , Ryuji Sugita , Tadashi Yasunaga
发明人： Makoto Nagao , Ryuji Sugita , Tadashi Yasunaga
摘要： A magnetic recording medium containing a magnetic recording layer with a coercivity squareness ratio of 0.4 to 0.9 is produced by magnetic transfer, for which a magnetic field is applied to an unrecorded magnetic recording medium while maintaining a patterned side of the patterned master medium in close contact with the magnetic recording layer for magnetic transfer. At least portions of the patterned side are made of a soft-magnetic material, and the pattern formed on the patterned side has a bit length of 60 nm or smaller. It is possible to arrange the magnetic recording layer to have a coercive force of 398 kA/m or greater, reduce the bit length to 55 nm or smaller, and heat the magnetic recording layer to 100° C. or higher during application of the magnetic field.
摘要翻译： 通过磁转移产生含有矫顽力矩形比为0.4〜0.9的磁记录层的磁记录介质，对未记录的磁记录介质施加磁场，同时保持图案化主介质的图案侧紧密接触 与磁记录层进行磁转移。 图案化侧的至少一部分由软磁性材料制成，并且在图案化侧上形成的图案具有60nm或更小的位长度。 可以使磁记录层具有398kA / m以上的矫顽力，将位长度减小到55nm以下，并且在施加磁性时将磁记录层加热到100℃以上 领域。
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66.发明申请公开(公告)号：US20050213236A1
公开(公告)日：2005-09-29
申请号：US11087649
申请日：2005-03-24
申请人： Masakazu Nishikawa , Makoto Nagao
发明人： Masakazu Nishikawa , Makoto Nagao
CPC分类号： B82Y10/00 , G11B5/59688 , G11B5/743 , G11B5/865
摘要： A master information carrier for magnetic transfer bears uneven signal patterns on its surface. When the minimum bit length in the uneven signal patterns is Bmin, dummy uneven patterns are provided in a depression of the uneven signal patterns, which has a length of 4Bmin or longer in the direction along a track. When magnetic transfer is performed, magnetized patterns corresponding to the dummy uneven patterns are transferred onto a slave medium. The magnetized patterns are patterns which will not be recognized as reproduction signals at a drive, into which the slave medium after magnetic transfer will be loaded.
摘要翻译： 用于磁转移的主信息载体在其表面上具有不均匀的信号图案。 当不均匀信号图案中的最小位长度为B 时，在不均匀信号图案的凹陷中提供虚设不均匀图案，其长度为4B分钟或 沿着轨道的方向更长。 当进行磁转移时，对应于虚拟不均匀图案的磁化图案被转移到从属介质上。 磁化图案是在驱动器处将不被识别为再现信号的图案，磁传输之后的从介质将被加载到该驱动器中。
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67.发明申请Magnetic recording medium including a magnetic layer containing a nonmagnetic oxide 审中-公开磁记录介质包括含有非磁性氧化物的磁性层公开(公告)号：US20050008901A1
公开(公告)日：2005-01-13
申请号：US10915344
申请日：2004-08-11
CPC分类号： G11B5/7325 , G11B5/656 , G11B5/7315 , G11B5/7379 , G11B5/851 , Y10T428/24248 , Y10T428/24281 , Y10T428/256 , Y10T428/259
摘要： A magnetic recording medium, which contains a chromium-containing primer layer and a magnetic layer at least on one surface of a nonmagnetic support member, the chromium-containing primer layer contains chromium and at least one type of element selected from a group of cobalt, beryllium, osmium, rhenium, titanium, zinc, tantalum, aluminum, molybdenum, tungsten, vanadium, iron, antimony, iridium, ruthenium, rhodium, platinum, palladium, silicon, and zirconium, and the magnetic layer contains a ferromagnetic metal alloy containing at least cobalt, platinum and chromium, and a nonmagnetic material.
摘要翻译： 一种磁记录介质，其含有至少在非磁性支撑构件的一个表面上的含铬底漆层和磁性层，所述含铬底漆层含有铬和至少一种选自钴， 铍，锇，铼，钛，锌，钽，铝，钼，钨，钒，铁，锑，铱，钌，铑，铂，钯，硅和锆，并且磁性层含有强磁性金属合金， 最少的钴，铂和铬，以及非磁性材料。
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68.发明授权Method of magnetically transferring information signal from master medium to slave medium 失效将信息信号从主介质传送到从属介质的方法公开(公告)号：US06735026B2
公开(公告)日：2004-05-11
申请号：US09920722
申请日：2001-08-03
申请人： Masakazu Nishikawa , Makoto Nagao
发明人： Masakazu Nishikawa , Makoto Nagao
IPC分类号： G11B586
CPC分类号： G11B5/865
摘要： Disclosed is a magnetic transfer method magnetically transferring information signals such as servo signals from a master medium to a slave medium, which is capable of preventing the occurrence of missing signals due to insufficient contact of the master medium and the slave medium originating from adhering of dust to the slave medium, thus increasing reliability. When the master medium bearing information signals and the slave medium are brought into close contacted with each other, and when a transfer magnetic field is applied to the master medium and the slave medium to magnetically transfer the information signal from the master medium to the slave medium, a metal thin film formed on a substrate of the master medium is electrically grounded, and charges of the master medium are removed, thus reducing a quantity of adhering dust.
摘要翻译： 公开了一种磁传输方法，其将诸如伺服信号的信息信号从主介质传送到从属介质，其能够防止由于主介质和源自灰尘附着的从属介质的不充分接触而发生缺失信号 到从属介质，从而提高可靠性。 当主介质承载信息信号和从属介质彼此紧密接触时，并且当传递磁场施加到主介质和从介质以将信息信号从主介质磁传输到从介质时 形成在主介质的基板上的金属薄膜电接地，并且除去主介质的电荷，从而减少粘附的灰尘的量。
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公开(公告)号：US06731440B1
公开(公告)日：2004-05-04
申请号：US09565494
申请日：2000-05-05
IPC分类号： G11B586
CPC分类号： G11B5/865
摘要： The present invention provides a method for magnetic transfer, the method including the steps of arranging ring shape head electromagnets at least on one of upper and lower surfaces of the slave medium, rotating the slave medium or the ring shape head electromagnet in track direction, performing initial DC magnetization on the slave medium in advance in track direction by applying magnetic field in track direction on the surface of the slave medium, bringing the master carrier for magnetic transfer closely together with the slave medium processed by the initial DC magnetization, and performing magnetic transfer by applying magnetic field for transfer in track direction reverse to the direction of the initial DC magnetization on the surface of the slave medium.
摘要翻译： 本发明提供一种磁转移方法，该方法包括以下步骤：至少在从介质的上表面和下表面之一上布置环形磁头电磁体，在磁道方向上旋转从属介质或环形磁头电磁体，执行 通过在从动介质的表面上沿轨道方向施加磁场，在从动介质上预先在从动介质上初始直流磁化，使主载体磁传递紧密地与由初始DC磁化处理的从介质一起，并执行磁 通过在从动介质的表面上沿与初始DC磁化方向相反的磁道方向施加磁场传递。
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公开(公告)号：US06570724B1
公开(公告)日：2003-05-27
申请号：US09558338
申请日：2000-04-26
IPC分类号： G11B586
CPC分类号： G11B5/865
摘要： The present invention provides a method for magnetic transfer, which including the steps of: arranging permanent magnets each magnetized symmetrically to the axis of the magnetic pole with the same polarities facing to each other and with the slave medium interposed between, and disposing the slave medium perpendicularly to the axis of the magnetic pole, rotating the slave medium or the permanent magnets in track direction; and applying magnetic field in track direction on the surface of the slave medium, whereby: after initial DC magnetization has been formed on the slave medium in advance in track direction, the master carrier for magnetic transfer and the slave medium processed by the initial DC magnetization are brought closely together, and a magnetic field for transfer in reverse direction to the direction of the initial DC magnetization on the surface of the slave medium is applied in track direction, and magnetic transfer is performed.
摘要翻译： 本发明提供了一种磁转移方法，其特征在于包括以下步骤：将相对于彼此相对的极性相对于磁极的对称磁化的永久磁铁布置在介质之间并配置从属介质 垂直于磁极的轴线，在从动介质或永磁体沿轨道方向旋转; 并且在从动介质的表面上沿轨道方向施加磁场，由此：在从动介质上在磁道方向上预先形成初始DC磁化之后，用于磁转移的主载体和由初始DC磁化处理的从属介质是 紧贴在一起，并且在磁带方向上施加用于在从属介质的表面上的与初始DC磁化方向相反的方向传递的磁场，并且进行磁转移。
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