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41.发明授权公开(公告)号：US06816327B2
公开(公告)日：2004-11-09
申请号：US10304998
申请日：2002-11-27
IPC分类号： G11B586
CPC分类号： B82Y10/00 , G11B5/59633 , G11B5/743 , G11B5/82 , G11B5/865 , Y10T428/273
摘要： A master information carrier for magnetic transfer to an in-plane magnetic recording medium includes a base sheet having an irregularity pattern representing information to be transferred to an in-plane magnetic recording medium and a magnetic layer formed along the irregularity pattern. The thickness da1 of the magnetic layer on the upper surface of a protruding portion of the irregularity pattern and the thickness da2 of the magnetic layer on each of the side surfaces of the protruding portion satisfy the following condition, 0.05
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公开(公告)号：US5069932A
公开(公告)日：1991-12-03
申请号：US683626
申请日：1991-04-11
申请人： Junji Nakada , Hideaki Takeuchi , Tadashi Yasunaga
发明人： Junji Nakada , Hideaki Takeuchi , Tadashi Yasunaga
CPC分类号： G11B5/84
摘要： A continuous polymeric substrate for a magnetic recording medium, on which magnetic material is deposited during which the end portions of both sides of the substrate is masked, is wound up on a wind-up roll in a vacuum atmosphere while the substrate is fluctuated in a width direction by a fluctuating width ranging from 0.2 mm to 40 mm in a fluctuating cycle ranging from 10 seconds to 1000 seconds.
摘要翻译： 一种用于磁记录介质的连续聚合物基材，其上沉积有磁性材料，其中基板的两侧的端部被掩蔽，在真空气氛中卷绕在卷绕辊上，同时基板在 宽度范围为0.2mm至40mm的波动宽度，波动周期为10秒至1000秒。
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公开(公告)号：US4988535A
公开(公告)日：1991-01-29
申请号：US242869
申请日：1988-09-12
CPC分类号： G11B5/65 , G11B5/851 , Y10S428/90
摘要： A magnetic recording medium comprises a non-magnetic substrate and a magnetic film which is formed on the non-magnetic substrate and the major component of which is iron nitride-oxide.
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公开(公告)号：US4935605A
公开(公告)日：1990-06-19
申请号：US278407
申请日：1988-12-01
申请人： Tadashi Yasunaga , Masaru Sekine
发明人： Tadashi Yasunaga , Masaru Sekine
CPC分类号： G11B5/84 , G11B23/502
摘要： An apparatus for correcting curl of a belt-like magnetic recording medium made of a ferromagnetic thin film formed on a flexible substrate, in which the magnetic recording medium fed from a master roll thereof contacts a heating roller so that curl of the magnetic recording medium is corrected. The surface of the heating roller is covered with a material having thermal conductivity lower than that of a material forming the body of the heating roller.
摘要翻译： 一种用于校正由形成在柔性基板上的铁磁薄膜构成的带状磁记录介质的卷曲的装置，其中从其主辊馈送的磁记录介质接触加热辊，使得磁记录介质的卷曲为 纠正 加热辊的表面覆盖有导热率低于形成加热辊的主体的材料的导热性的材料。
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公开(公告)号：US4923748A
公开(公告)日：1990-05-08
申请号：US179924
申请日：1988-04-11
申请人： Tadashi Yasunaga , Akio Yanai , Koji Sasazawa
发明人： Tadashi Yasunaga , Akio Yanai , Koji Sasazawa
CPC分类号： G11B5/653 , Y10S428/90 , Y10T428/265
摘要： A durable, weather-resistant and anti-corrosive magnetic recording medium is disclosed, which comprises a non-magnetic support having coated thereon a thin film type magnetic layer comprising iron, nitrogen oxygen and at least one element selected from the group consisting of titanium, silicon, aluminum and tantalum.
摘要翻译： 公开了一种耐用，耐候和抗腐蚀的磁记录介质，其包括其上涂覆有薄膜型磁性层的非磁性载体，所述薄膜型磁性层包含铁，氮氧和选自钛， 硅，铝和钽。
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公开(公告)号：US4673610A
公开(公告)日：1987-06-16
申请号：US767778
申请日：1985-08-20
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/2495 , Y10T428/26
摘要： A magnetic recording medium comprises a non-magnetic substrate, a first magnetic film layer which is formed on the non-magnetic substrate and whose major component is cobalt, and a second magnetic film layer which is overlaid on the first magnetic film layer and whose major component is iron nitride.
摘要翻译： 磁记录介质包括非磁性基板，形成在非磁性基板上并且其主要成分为钴的第一磁性膜层和覆盖在第一磁性膜层上的第二磁性膜层，其主要 组分是氮化铁。
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公开(公告)号：US07477463B2
公开(公告)日：2009-01-13
申请号：US10770573
申请日：2004-02-04
IPC分类号： G11B5/86
摘要： A master information carrier has on its surface a signal area where an embossed pattern formed by protruding portions and recessed portions and representing a signal pattern to be transferred has been formed. The shortest bit length of the embossed patter is 300 nm or shorter, and the embossed pattern is formed so that the total of the areas of the upper surfaces of the protruding portions of the embossed pattern is smaller than the total of the areas of inter-protruding-portions in the signal area.
摘要翻译： 主信息载体在其表面上具有形成由突出部分和凹陷部分形成并表示要传送的信号图案的压花图案的信号区域。 压印图案的最短位长度为300nm以下，压花图案形成为使压花图案的突出部的上表面的面积的总和小于相互之间的区域的总和， 信号区域中的突出部分。
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48.发明申请公开(公告)号：US20070217047A1
公开(公告)日：2007-09-20
申请号：US11716007
申请日：2007-03-09
申请人： Kenji Ichikawa , Toshihiro Usa , Kazuhiro Niitsuma , Tadashi Yasunaga , Sumio Kuroda , Tsugito Maruyama
发明人： Kenji Ichikawa , Toshihiro Usa , Kazuhiro Niitsuma , Tadashi Yasunaga , Sumio Kuroda , Tsugito Maruyama
摘要： An aspect of the present invention provides a master medium for perpendicular magnetic transfer, comprising: a disk-like substrate on a surface of which a plurality of protruding magnetic-layer patterns corresponding to information to be transferred to a magnetic recording medium targeted for transfer are formed. In the master medium for perpendicular magnetic transfer, a ratio of a circumferential width L of the protruding magnetic-layer patterns to a circumferential gap S between the protruding magnetic-layer patterns is L/S
摘要翻译： 本发明的一个方面提供了一种用于垂直磁转移的主介质，其特征在于，包括：一个表面上的盘状衬底，其中多个突出的磁性层图案对应于要传送到用于传送的磁记录介质的信息 形成。 在用于垂直磁转移的主介质中，突出磁层图案的周向宽度L与突出磁层图案之间的周向间隙S的比率为L / S <1。 根据本发明的方面，可以进行良好的磁转移，因此可以获得没有缺陷并具有良好C / N比的垂直磁记录介质（从盘）。 另外，可以进行良好的磁转移。
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49.发明申请Magnetic recording medium, method of producing the magnetic recording medium, patterned master carrier for magnetic transfer employed during production of the magnetic recording medium, and magnetic recording/reproducing apparatus 审中-公开磁记录介质，制造磁记录介质的方法，在磁记录介质的制造过程中使用的用于磁转移的图形化主载体，以及磁记录/重放装置公开(公告)号：US20050213235A1
公开(公告)日：2005-09-29
申请号：US11087565
申请日：2005-03-24
申请人： Tadashi Yasunaga
发明人： Tadashi Yasunaga
CPC分类号： G11B5/59655 , G11B5/59633 , G11B5/74 , G11B5/82 , G11B5/865
摘要： A magnetic recording medium which is capable of accurately performing reproduction amplitude servo positioning is obtained. Servo signals for reproduction amplitude tracking servo are constituted by an A burst bit row and a B burst bit row. The A burst bit row is recorded straddling a first and second track. The B burst bit row is recorded straddling a second and third track. Recording regions of each of the burst bits that constitute the A burst bit row and the B burst bit row have lengths in the track width direction which are longer than a track width. The burst bits are recorded such that the recording regions thereof overlap in the track width direction at the center of the data track of the second track in the track width direction thereof.
摘要翻译： 获得能够精确地执行再现振幅伺服定位的磁记录介质。 用于再现幅度跟踪伺服的伺服信号由A突发位行和B突发位行构成。 A突发位行被记录跨越第一和第二轨道。 B突发位行被跨越第二和第三轨道记录。 构成A突发比特行和B突发比特列的每个突发比特的记录区域在轨道宽度方向上具有长于轨道宽度的长度。 记录突发位，使得其记录区域在轨道宽度方向上的第二轨道的数据轨道的中心处的轨道宽度方向上重叠。
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公开(公告)号：US06911270B2
公开(公告)日：2005-06-28
申请号：US10317111
申请日：2002-12-12
CPC分类号： B82Y10/00 , G11B5/743 , G11B5/82 , G11B5/865 , Y10T428/12986 , Y10T428/24479 , Y10T428/2495 , Y10T428/31
摘要： A master information carrier for magnetic transfer includes a base sheet which is formed of a magnetic material. The master information carrier is provided with an irregularity pattern representing information to be transferred to a magnetic recording medium and a magnetic layer formed along the irregularity pattern. The saturation magnetization Mm of the magnetic layer and the saturation magnetization Ms of the base sheet satisfy the condition 1.0
摘要翻译： 用于磁转移的主信息载体包括由磁性材料形成的基片。 主信息载体具有表示要传送到磁记录介质的信息的不规则图案和沿着不规则图案形成的磁性层。 磁性层的饱和磁化强度Mm和基片的饱和磁化强度Ms满足条件<？in-line-formula description =“In-line Formulas”end =“lead”？> 1.0
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