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1.发明授权公开(公告)号：US07923134B2
公开(公告)日：2011-04-12
申请号：US12284913
申请日：2008-09-26
摘要： Embodiments of the present invention help to provide a discrete track medium for realizing a high track density in a low price by adopting a configuration, in which filling of a non-magnetic material into a guard band portion and smoothing processing of a medium surface are not required. According to one embodiment, a perpendicular magnetic recording medium, on the non-magnetic substrate, includes at least: a soft magnetic underlayer; a first recording layer including a crystal grain having a magnetic property and a non-magnetic grain boundary having an oxide, as a main component, surrounding the crystal grain; a second recording layer containing a ferromagnetic metal as a main component and not containing an oxide; and at least one non-magnetic layer provided between the first recording layer and the second recording layer. A recording track portion for magnetically recording information and a guard band portion provided between adjacent recording track portions are included in the perpendicular magnetic recording medium. The relationship between the total thickness t1 of the non-magnetic layer in the guard band portion and the total thickness t2 of the non-magnetic layer in the recording track portion is set as t1>t2.
摘要翻译： 本发明的实施例有助于提供一种用于实现低价格的高轨道密度的离散轨道介质，其采用将非磁性材料填充到保护带部分和平滑处理介质表面的配置 需要。 根据一个实施例，非磁性衬底上的垂直磁记录介质至少包括：软磁性底层; 第一记录层，包括具有磁性的晶粒和具有氧化物的非磁性晶界作为主要成分的晶粒; 含有铁磁性金属作为主要成分并且不含有氧化物的第二记录层; 以及设置在第一记录层和第二记录层之间的至少一个非磁性层。 用于磁记录信息的记录磁道部分和设置在相邻记录磁道部分之间的保护带部分被包括在垂直磁记录介质中。 保护带部分中的非磁性层的总厚度t1与记录轨道部分中的非磁性层的总厚度t2之间的关系被设置为t1> t2。
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2.发明申请公开(公告)号：US20090086372A1
公开(公告)日：2009-04-02
申请号：US12284913
申请日：2008-09-26
摘要： Embodiments of the present invention help to provide a discrete track medium for realizing a high track density in a low price by adopting a configuration, in which filling of a non-magnetic material into a guard band portion and smoothing processing of a medium surface are not required. According to one embodiment, a perpendicular magnetic recording medium, on the non-magnetic substrate, includes at least: a soft magnetic underlayer; a first recording layer including a crystal grain having a magnetic property and a non-magnetic grain boundary having an oxide, as a main component, surrounding the crystal grain; a second recording layer containing a ferromagnetic metal as a main component and not containing an oxide; and at least one non-magnetic layer provided between the first recording layer and the second recording layer. A recording track portion for magnetically recording information and a guard band portion provided between adjacent recording track portions are included in the perpendicular magnetic recording medium. The relationship between the total thickness t1 of the non-magnetic layer in the guard band portion and the total thickness t2 of the non-magnetic layer in the recording track portion is set as t1>t2.
摘要翻译： 本发明的实施例有助于提供一种用于实现低价格的高轨道密度的离散轨道介质，其采用将非磁性材料填充到保护带部分和平滑处理介质表面的配置 需要。 根据一个实施例，非磁性衬底上的垂直磁记录介质至少包括：软磁性底层; 第一记录层，包括具有磁性的晶粒和具有氧化物的非磁性晶界作为主要成分的晶粒; 含有铁磁性金属作为主要成分并且不含有氧化物的第二记录层; 以及设置在第一记录层和第二记录层之间的至少一个非磁性层。 用于磁记录信息的记录磁道部分和设置在相邻记录磁道部分之间的保护带部分被包括在垂直磁记录介质中。 保护带部分中的非磁性层的总厚度t1与记录轨道部分中的非磁性层的总厚度t2之间的关系被设置为t1> t2。
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公开(公告)号：US08089829B2
公开(公告)日：2012-01-03
申请号：US12608232
申请日：2009-10-29
IPC分类号： G11B11/00
摘要： A thermally assisted magnetic recording medium includes a substrate and at least two, i.e., first and second magnetic recording layers. These layers are hard magnetic layers and contain magnetic grains and a non-magnetic substance magnetically segregating the magnetic grains at grain boundaries. The first magnetic recording layer has a magnetic anisotropy energy Ku1, a grain volume v1, and energy for maintaining its recording magnetization Ku1v1; the second magnetic recording layer has a magnetic anisotropy energy Ku2, a grain volume v2, and energy for maintaining its recording magnetization Ku2v2; and the ratio Ku1v1/kBT of Ku1v1 to a thermal fluctuation energy kBT, where kB represents a Boltzmann constant and T represents an absolute temperature, and the ratio Ku2v2/kBT of Ku2v2 to kBT satisfy the following conditions: Ku1v1/kBT is larger than Ku2v2/kBT at room temperature, but is smaller than Ku2v2/kBT at temperatures around the Curie temperature of the first magnetic recording layer.
摘要翻译： 热辅助磁记录介质包括基底和至少两个，即第一和第二磁记录层。 这些层是硬磁性层，并且含有磁性颗粒，并且非磁性物质在晶界处磁性地分离磁性颗粒。 第一磁记录层具有磁各向异性能Ku1，晶粒体积v1和用于保持其记录磁化强度Ku1v1的能量; 第二磁记录层具有磁各向异性能Ku2，晶粒体积v2和用于保持其记录磁化Ku2v2的能量; Ku1v1 / kBT的Ku1v1 / kBT与热波动能kBT的比值，其中kB表示玻耳兹曼常数，T表示绝对温度，Ku2v2与kBT的Ku2v2 / kBT的比值满足以下条件：Ku1v1 / kBT大于Ku2v2 / kBT，但在第一磁记录层的居里温度附近的温度下小于Ku2v2 / kBT。
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公开(公告)号：US06952380B2
公开(公告)日：2005-10-04
申请号：US10138568
申请日：2002-05-06
IPC分类号： G11B5/64 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/127 , G11B5/66 , G11B5/673 , G11B11/10 , G11B13/04 , G11B7/00
CPC分类号： G11B5/66 , G11B5/00 , G11B5/012 , G11B5/127 , G11B5/1278 , G11B13/045 , G11B2005/0002 , G11B2005/0005 , G11B2005/001 , G11B2005/0013 , G11B2005/0021 , G11B2005/0029
摘要： A vertical magnetic recording apparatus is provided which can diminish thermal decay of magnetization to ensure a high reliability of the life of recorded information and which can stably effect the write of magnetic information. Light assist is performed by obliquely applying light to a gap between a main pole of a vertical recording head and a medium. The light is radiated from the head side of the apparatus with respect to the medium. Utilizing the present invention, the thermal decay of magnetization at room temperature is diminished, the life of the recorded information is increased, and the storage reliability of the disk is increased.
摘要翻译： 提供了一种垂直磁记录装置，其可以减少磁化的热衰减，以确保记录信息的寿命的高可靠性，并且可以稳定地影响磁信息的写入。 通过向垂直记录头的主极和介质之间的间隙倾斜地施加光来执行光辅助。 光从设备的头侧相对于介质辐射。 利用本发明，室温下磁化的热衰减减小，记录信息的寿命增加，并且磁盘的存储可靠性增加。
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公开(公告)号：US07625646B2
公开(公告)日：2009-12-01
申请号：US11354085
申请日：2006-02-15
申请人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
IPC分类号： G11B5/66
摘要： Disclosed are a perpendicular magnetic recording medium with lower medium noise, insusceptible to thermal fluctuation and high recording resolution and a method of manufacturing it. As the step of forming a metal layer at the time of forming a recording layer on a non-magnetic substrate via a plurality of underlayers and the step of forming an oxide layer with an average thickness of 0.2 nm or less are repeated, the crystal grains are magnetically isolated without disturbing the orientation of the crystal grain of the recording layer of the perpendicular magnetic recording medium or without degrading the magnetic characteristic of the crystal grain of the recording layer.
摘要翻译： 公开了一种具有较低介质噪声，不易受热波动和高记录分辨率的垂直磁记录介质及其制造方法。 作为通过多个底层在非磁性基板上形成记录层时形成金属层的步骤，重复平均厚度为0.2nm以下的氧化物层的工序，晶粒 磁性隔离，而不会干扰垂直磁记录介质的记录层的晶粒的取向，或不降低记录层的晶粒的磁特性。
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6.发明授权Magnetic recording medium containing first and second recording layers, each layer containing a columnar structure 有权含有第一和第二记录层的磁记录介质，每层包含柱状结构公开(公告)号：US07556871B2
公开(公告)日：2009-07-07
申请号：US11105045
申请日：2005-04-12
IPC分类号： G11B5/66
CPC分类号： G11B5/667 , G11B5/66 , G11B5/7325
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium capable of reconciling a high recording density with high thermal stability, and having a high write-ability while maintaining high magnetic anisotropy energy. In one embodiment, a perpendicular magnetic recording medium has a soft-magnetic underlayer, and magnetic recording layers, and the magnetic recording layers comprises a first recording layer containing magnetic grains oriented in a direction normal to a medium plane, and a second recording layer containing magnetic grains tilted in a cross-track direction. There can be provided a perpendicular magnetic recording medium resistant to thermal fluctuation, small in medium noise, and excellent in write-ability.
摘要翻译： 本发明的实施方案提供了一种垂直磁记录介质，其能够调和高记录密度和高热稳定性，并且具有高的写入能力，同时保持高的磁各向异性能量。 在一个实施例中，垂直磁记录介质具有软磁性底层和磁记录层，并且磁记录层包括含有沿垂直于介质平面的方向取向的磁性颗粒的第一记录层和含有 磁性晶粒沿横向方向倾斜。 可以提供耐热波动，中等噪声小，写入性优异的垂直磁记录介质。
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公开(公告)号：US07033686B2
公开(公告)日：2006-04-25
申请号：US10701603
申请日：2003-11-06
申请人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
摘要： Disclosed are a perpendicular magnetic recording medium with lower medium noise, insusceptible to thermal fluctuation and high recording resolution and a method of manufacturing it. As the step of forming a metal layer at the time of forming a recording layer on a non-magnetic substrate via a plurality of underlayers and the step of forming an oxide layer with an average thickness of 0.2 nm or less are repeated, the crystal grains are magnetically isolated without disturbing the orientation of the crystal grain of the recording layer of the perpendicular magnetic recording medium or without degrading the magnetic characteristic of the crystal grain of the recording layer.
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公开(公告)号：US4708199A
公开(公告)日：1987-11-24
申请号：US834816
申请日：1986-02-28
CPC分类号： F28D9/0012 , F28D2021/0089 , Y10S165/361
摘要： A heat exchange element of a plate type heat exchanger consists of a plurality of heat transmission plates having an equivalent shape. Each heat transmission plate is formed with flanged through-holes and openings so that each flanged through-hole and each opening are alternately located and separate from each other by a predetermined peripheral distance along a circle of the heat transmission plate. The heat transmission plates are disposed one upon another and sealingly secured to each other in such a manner that one of adjacent heat transmission plates is shifted the predetermined peripheral distance along the circle relative to the other heat transmission plate, thereby enabling to produce the heat exchanger heat exchange element by using only the heat transmission plates of the equivalent shape.
摘要翻译： 板式热交换器的热交换元件由具有等效形状的多个传热板组成。 每个传热板形成有法兰通孔和开口，使得每个凸缘通孔和每个开口沿着传热板的圆周彼此交替地定位和分开预定的周边距离。 传热板一个接一个地彼此密封地彼此密封，使得相邻的传热板之一相对于另一个传热板沿着圆周移动预定的周边距离，从而能够产生热交换器 热交换元件仅使用等效形状的传热板。
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9.发明申请Perpendicular magnetic recording media and magnetic storage apparatus using the same 有权垂直磁记录介质及使用其的磁存储装置公开(公告)号：US20090052074A1
公开(公告)日：2009-02-26
申请号：US12156317
申请日：2008-05-30
申请人： Hiroyuki Nakagawa , Ryoko Araki , Naoto Ito , Takayuki Ichihara
发明人： Hiroyuki Nakagawa , Ryoko Araki , Naoto Ito , Takayuki Ichihara
摘要： Embodiments of the present invention provide a perpendicular magnetic recording media having excellent resolution, signal to noise ratio (S/N), and a small adjacent track erasure. According to one embodiment, underlayers for controlling the orientation and segregation of a magnetic layer, a magnetic layer including an oxide and an alloy of magnetic materials mainly composed of Co, Cr, and Pt, and a ferromagnetic-metal layer which does not contain oxygen, are formed over a substrate. The magnetic layer has at least two layers including ferromagnetic grains and oxides, a first magnetic layer, which is the part of the magnetic layer closer to the substrate, has grain boundaries mainly composed of Cr oxide and at least one oxide selected from Si, Ti, Nb, and Ta, and grain boundaries of a second magnetic layer at the ferromagnetic-metal layer side includes at least one oxide selected from Si, Ti, Nb, and Ta in which Cr oxide is less than the first magnetic layer.
摘要翻译： 本发明的实施例提供了具有优异的分辨率，信噪比（S / N）和小的相邻轨道擦除的垂直磁记录介质。 根据一个实施例，用于控制磁性层的取向和偏析的底层，包括氧化物的磁性层和主要由Co，Cr和Pt组成的磁性材料的合金以及不含氧的铁磁性金属层 ，形成在衬底上。 磁性层具有至少两层包括铁磁性粒子和氧化物的层，作为靠近衬底的磁性层的一部分的第一磁性层具有主要由Cr氧化物和至少一种选自Si，Ti Nb和Ta中的至少一种，并且在铁磁金属层侧的第二磁性层的晶界包含选自Si，Ti，Nb和Ta中的至少一种氧化物小于第一磁性层的氧化物。
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公开(公告)号：US20060134467A1
公开(公告)日：2006-06-22
申请号：US11354085
申请日：2006-02-15
申请人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
摘要： Disclosed are a perpendicular magnetic recording medium with lower medium noise, insusceptible to thermal fluctuation and high recording resolution and a method of manufacturing it. As the step of forming a metal layer at the time of forming a recording layer on a non-magnetic substrate via a plurality of underlayers and the step of forming an oxide layer with an average thickness of 0.2 nm or less are repeated, the crystal grains are magnetically isolated without disturbing the orientation of the crystal grain of the recording layer of the perpendicular magnetic recording medium or without degrading the magnetic characteristic of the crystal grain of the recording layer.
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