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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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公开(公告)号：US06909563B2
公开(公告)日：2005-06-21
申请号：US10142938
申请日：2002-05-13
CPC分类号： B82Y10/00 , G11B5/59633 , G11B5/743 , G11B5/82 , G11B5/865
摘要： A master carrier for magnetic transfer is equipped with a substrate having a land/groove pattern. The land/groove pattern is formed from a magnetic material and corresponds to information that is transferred to a magnetic recording disk. Each land in the land/groove pattern has four round corners whose radius is from 1% through 47% of the width of a data track on the disk.
摘要翻译： 用于磁转印的主载体配备有具有焊盘/凹槽图案的基板。 焊盘/凹槽图案由磁性材料形成，并对应于传送到磁记录盘的信息。 陆地/凹槽图案中的每个土地具有四个圆角，其半径为磁盘上数据轨道的宽度的1％至47％。
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公开(公告)号：US06906877B2
公开(公告)日：2005-06-14
申请号：US10163357
申请日：2002-06-07
摘要： A method of performing an accurate magnetic transfer to a high-density slave medium having two magnetic layers and utilizing antiferromagnetic coupling. The magnetic layer, which has been initially magnetized in advance, of a magnetic recording medium is conjoined with the data bearing surface of a master medium. A transfer magnetic field is applied to the conjoined body in the circumferential direction of the track of the first magnetic layer in the direction opposite the initial magnetization direction of the second magnetic layer. At this time, the thickness of the magnetic layer of the master medium, the permeability (material) of the magnetic layer, the form of the patterned magnetic layer, the separation distance between the master medium and the magnetic recording medium, etc., may be controlled so that the magnetic field of the transfer magnetic field does not effect the magnetization state of the first magnetic layer.
摘要翻译： 对具有两个磁性层并利用反铁磁耦合的高密度从属介质执行精确磁传递的方法。 磁记录介质的磁性层预先被磁化，并与主介质的数据承载表面相连。 在与第二磁性层的初始磁化方向相反的方向上，在第一磁性层的轨道的圆周方向上向结合体施加转移磁场。 此时，主介质的磁性层的厚度，磁性层的磁导率（材料），图案化磁性层的形式，主介质和磁记录介质之间的间隔距离等可以 被控制，使得传递磁场的磁场不影响第一磁性层的磁化状态。
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公开(公告)号：US5503943A
公开(公告)日：1996-04-02
申请号：US285781
申请日：1994-08-04
CPC分类号： G11B5/656 , G11B5/85 , Y10S428/90
摘要： A metal thin film magnetic recording medium having improved S/N and reduced noise is disclosed, which has a ferromagnetic metal thin film composed mainly of Co on a non-magnetic support, characterized in that the crystallite size as determined from the thin film X-ray diffraction method is 45 .ANG. (angstrom) or less relative to the (100) face of .alpha.-Co, and 120 .ANG. or less relative to the (002) face of .alpha.-Co.
摘要翻译： 公开了一种具有改善的S / N和降低的噪声的金属薄膜磁记录介质，其具有在非磁性载体上主要由Co组成的强磁性金属薄膜，其特征在于，从薄膜X- X射线衍射法相对于α-Co的（100）面为45（埃）或更小，相对于α-Co的（002）面为120或更小。
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公开(公告)号：US5123376A
公开(公告)日：1992-06-23
申请号：US641399
申请日：1991-01-15
申请人： Shiro Kaneko , Masao Takei , Tadashi Yasunaga
发明人： Shiro Kaneko , Masao Takei , Tadashi Yasunaga
IPC分类号： G11B5/84
CPC分类号： G11B5/8408
摘要： An apparatus for manufacturing a magnetic recording medium, including a device for oxidizing the surface of a thin magnetic film formed on a flexible carrier. A hermetic chamber is provided including a roll loading chamber for accommodating a supply roll of the carrier on which the thin magnetic film has been deposited in advance, a processing chamber, and a roll takeout chamber for accommodating a take-up roll of the carrier. A rotatable heating roll is disposed in the processing chamber. The carrier is guided from the supply roll accommodated in the roll loading chamber into the processing chamber and through a predetermined angle along the surface of the heating roll and then to the take-up roll accommodated in the takeout chamber. A baffle plate is provided near a peripheral surface of a portion of the heating roll on which the carrier is wound, and a plurality of nozzle units are provided in the plate for blowing gaseous oxygen or ozone toward the magnetic film.
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公开(公告)号：US5122389A
公开(公告)日：1992-06-16
申请号：US662309
申请日：1991-02-28
申请人： Tadashi Yasunaga
发明人： Tadashi Yasunaga
CPC分类号： C23C14/30 , C23C14/243
摘要： Two heat-resistant rollers are located close to each other such that rotation shafts of the two heat-resistant rollers are approximately parallel to each other, and parts of the two heat-resistant rollers are immersed in a deposition material, which has been molten in a crucible. The two heat-resistant rollers are rotated in opposite directions. Parts of the molten deposition material are entrained by the circumferential surfaces of the two heat-resistant rollers, and a concave part of the molten deposition material is formed at a region, at which the entrained parts of the molten deposition material come into contact with each other. An electron beam is irradiated to the concave part of the molten deposition material. The molten deposition material is thereby evaporated from the concave part such that the resulting stream of vapor of the molten deposition material may be directed at an oblique angle or approximately horizontally with respect to the surface of the molten deposition material in the region other than the region in which the two heat-resistant rollers are located. A thin film of the deposition material is thus deposited on the substrate.
摘要翻译： 两个耐热辊彼此靠近，使得两个耐热辊的旋转轴彼此近似平行，并且两个耐热辊的一部分浸入已熔化的沉积材料中 一个坩埚 两个耐热辊沿相反方向旋转。 熔融沉积材料的一部分被两个耐热辊的圆周表面夹带，并且熔融沉积材料的凹部形成在熔融沉积材料的夹带部分与每个熔融沉积材料接触的区域处 其他。 电子束照射到熔融沉积材料的凹部。 熔融沉积材料因此从凹部蒸发，使得所得到的熔融沉积材料的蒸气流可以相对于熔融沉积材料在该区域以外的区域中的表面倾斜或大致水平地定向 其中两个耐热辊位于其中。 因此沉积材料的薄膜沉积在基底上。
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公开(公告)号：US5112669A
公开(公告)日：1992-05-12
申请号：US498517
申请日：1990-03-26
申请人： Kenichi Yoden , Tadashi Yasunaga
发明人： Kenichi Yoden , Tadashi Yasunaga
CPC分类号： G11B5/65 , Y10S428/90 , Y10T428/24355 , Y10T428/265
摘要： A magnetic recording medium comprises a non-magnetic substrate and a thin magnetic metal layer which is overlaid on the non-magnetic substrate. The volume of pores in the thin magnetic metal layer falls within the range of 0.005 to 0.05 ml per gram of the thin magnetic metal layer.
摘要翻译： 磁记录介质包括非磁性衬底和覆盖在非磁性衬底上的薄磁性金属层。 薄磁性金属层中的孔的体积在每克薄磁性金属层中在0.005至0.05ml的范围内。
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公开(公告)号：US4983421A
公开(公告)日：1991-01-08
申请号：US449339
申请日：1989-12-13
CPC分类号： C23C14/562 , C23C14/20 , C23C14/58 , G11B5/725 , G11B5/8408
摘要： A method is described for producing a metal thin film type magnetic recording medium having a ferromagnetic metal or alloy thin film provided on a non-magnetic support, comprising the steps of forming said ferromagnetic metal or alloy thin film on said non-magnetic support, and then buffing the surface of said ferromagnetic metal or alloy thin film with nonwoven fabric.
摘要翻译： 描述了一种制造具有设置在非磁性载体上的强磁性金属或合金薄膜的金属薄膜型磁记录介质的方法，包括在所述非磁性载体上形成所述强磁性金属或合金薄膜的步骤，以及 然后用无纺布抛光所述强磁性金属或合金薄膜的表面。
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公开(公告)号：US4948626A
公开(公告)日：1990-08-14
申请号：US305050
申请日：1989-02-02
申请人： Tadashi Yasunaga , Koji Sasazawa , Akio Yanai
发明人： Tadashi Yasunaga , Koji Sasazawa , Akio Yanai
CPC分类号： G11B5/85
摘要： A method for producing a thin-film magnetic recording medium having an improved corrosion resistance and which permits production of the medium at a high speed. A magnetic material vapor flow from an evaporation source and a gas or ion flow are applied to a nonmagnetic base in an evaporation chamber and the two flows reacted with each other to form the thin-film magnetic layer on the nonmagnetic base. During this process, the expression P.sub.1 /P.sub.0 .ltoreq.0.1 is maintained, wherein P.sub.0 represents the degree of vacuum in the evaporation chamber, under a first condition where only the gas or ion flow is applied after the pressure in the chamber has been reduced to a predetermined degree of vacuum, and P.sub.1 represents the degree of vacuum in the chamber under a second condition where the magnetic material vapor flow is applied to the nonmagnetic base simultaneously with the gas or ion flow. The rate of formation of the thin-film magnetic layer is 200 .ANG./sec or more on the average.
摘要翻译： 一种制造具有改善的耐腐蚀性且允许高速生产介质的薄膜磁记录介质的方法。 来自蒸发源和气体或离子流的磁性材料蒸汽流被施加到蒸发室中的非磁性基底，并且两个流彼此反应以在非磁性基底上形成薄膜磁性层。 在该过程中，保持表达式P1 / P0 <0.1，其中P0表示蒸发室中的真空度，在第一条件下，在室中的压力已经减小之后仅施加气体或离子流 达到预定的真空度，P1表示在与气体或离子流同时向非磁性基底施加磁性材料蒸气流的第二状态下的室内的真空度。 平均薄膜磁性层的形成速度为200安培/秒以上。
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公开(公告)号：US4724156A
公开(公告)日：1988-02-09
申请号：US901976
申请日：1986-09-02
CPC分类号： G11B5/85 , G11B5/70615
摘要： In manufacturing a magnetic recording medium, a flow of iron vapor is formed in a nitrogen atmosphere and iron vapor particles in the flow of iron vapor are deposited on a non-magnetic substrate together with nitrogen particles to form an iron nitride film thereon. Before deposition on the non-magnetic substrate, the nitrogen particles are ionized by an ion beam generating means and the iron vapor particles are ionized by a high-frequency discharge.
摘要翻译： 在制造磁记录介质时，在氮气气氛中形成铁蒸气流，铁蒸汽流中的铁蒸气颗粒与氮颗粒一起沉积在非磁性基板上，以在其上形成氮化铁膜。 在非磁性基板上沉积之前，通过离子束产生装置将氮颗粒离子化，并通过高频放电使铁蒸气颗粒离子化。
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