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1.发明申请公开(公告)号：US20090162573A1
公开(公告)日：2009-06-25
申请号：US11960006
申请日：2007-12-19
IPC分类号： H01F1/00
CPC分类号： H01F41/32 , B82Y25/00 , G11B5/667 , G11B5/8404 , H01F10/3268
摘要： Soft magnetic film fabricated with preferred uniaxial anisotropy for perpendicular recording. One type of cathode design has a field direction that is parallel to the direction of the Hex of the second SUL with a magnetically-pinned first SUL. In addition, SUL structures having low AP exchange energy also are disclosed. The SUL structure combines the cathode field direction of the SUL2 with the pinned SUL1. The SUL1 is magnetically pinned to the pinning layer and the pinning direction is parallel to the direction of the cathode field applied during deposition of the SUL1. High Hc ferro-magnetic materials may be deposited onto a heated substrate that is magnetized along the radial direction by the cathode field. The pinning field may be higher than the cathode field, indicating that the cathode field during deposition of the SUL2 cannot disturb the magnetic state of the SUL1 pinned to pinning layer.
摘要翻译： 用于垂直记录的具有优选的单轴各向异性制造的软磁膜。 一种类型的阴极设计具有平行于具有磁性固定的第一SUL的第二SUL的Hex的方向的场方向。 此外，还公开了具有低AP交换能量的SUL结构。 SUL结构将SUL2的阴极场方向与固定SUL1相结合。 SUL1被磁性地固定到钉扎层，并且钉扎方向平行于在沉积SUL1期间施加的阴极场的方向。 高Hc铁磁材料可以沉积在被阴极场沿径向磁化的加热衬底上。 钉扎场可能高于阴极场，表明SUL2沉积期间的阴极场不能干扰固定到钉扎层的SUL1的磁状态。
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2.发明授权Methods and apparatus to fabricate soft magnetic film with preferred uniaxial anisotropy for perpendicular recording 有权用于垂直记录制备具有优选的单轴各向异性的软磁膜的方法和装置公开(公告)号：US08252367B2
公开(公告)日：2012-08-28
申请号：US11960006
申请日：2007-12-19
CPC分类号： H01F41/32 , B82Y25/00 , G11B5/667 , G11B5/8404 , H01F10/3268
摘要： Soft magnetic film fabricated with preferred uniaxial anisotropy for perpendicular recording. One type of cathode design has a field direction that is parallel to the direction of the Hex of the second SUL with a magnetically-pinned first SUL. In addition, SUL structures having low AP exchange energy also are disclosed. The SUL structure combines the cathode field direction of the SUL2 with the pinned SUL1. The SUL1 is magnetically pinned to the pinning layer and the pinning direction is parallel to the direction of the cathode field applied during deposition of the SUL1. High Hc ferro-magnetic materials may be deposited onto a heated substrate that is magnetized along the radial direction by the cathode field. The pinning field may be higher than the cathode field, indicating that the cathode field during deposition of the SUL2 cannot disturb the magnetic state of the SUL1 pinned to pinning layer.
摘要翻译： 用于垂直记录的具有优选的单轴各向异性制造的软磁膜。 一种类型的阴极设计具有平行于具有磁性固定的第一SUL的第二SUL的Hex的方向的场方向。 此外，还公开了具有低AP交换能量的SUL结构。 SUL结构将SUL2的阴极场方向与固定SUL1相结合。 SUL1被磁性地固定到钉扎层，并且钉扎方向平行于在沉积SUL1期间施加的阴极场的方向。 高Hc铁磁材料可以沉积在被阴极场沿径向磁化的加热衬底上。 钉扎场可能高于阴极场，表明SUL2沉积期间的阴极场不能干扰固定到钉扎层的SUL1的磁状态。
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公开(公告)号：US08440332B2
公开(公告)日：2013-05-14
申请号：US12384850
申请日：2009-04-08
申请人： Ichiro Tamai , Kiwamu Tanahashi
发明人： Ichiro Tamai , Kiwamu Tanahashi
IPC分类号： G11B5/66
摘要： Embodiments of the present invention provide a perpendicular magnetic recording medium that reduces the noise of granular recording layers, obtains sufficient overwrite characteristic that suppresses an increase in the magnetic cluster size, and allows high-density recording. According to one embodiment, a perpendicular magnetic recording medium comprising substrate having thereon at least soft magnetic layer, nonmagnetic intermediate layer, a perpendicular recording layer and protective layer formed in that order. The perpendicular recording layer consists of three or more layers of first recording layer, a second recording layer, and a third recording layer from the side nearer to the substrate. The first recording layer and the second recording layer have a granular structure comprising a grain boundary of an oxide surrounding ferromagnetic crystal grains containing Co and Pt, and the third recording layer has a non-granular structure mainly comprising Co and not containing an oxide. The grain boundary of the first recording layer contains Si, Cr and oxygen, and at least one element selected from Ti, Ta and Nb, and the grain boundary of the second recording layer contains Cr and oxygen, or contains Cr and oxygen and at least one element selected from Si, W and V.
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4.发明授权公开(公告)号：US08000060B2
公开(公告)日：2011-08-16
申请号：US12009415
申请日：2008-01-17
申请人： Zhengang Zhang , Ikuko Takekuma , Kiwamu Tanahashi
发明人： Zhengang Zhang , Ikuko Takekuma , Kiwamu Tanahashi
IPC分类号： G11B5/82
CPC分类号： G11B5/1278 , B82Y10/00 , G11B5/743 , G11B5/855
摘要： Embodiments of the present invention provide a perpendicular magnetic recording medium having a substrate, a magnetic recording layer and a protective layer. The magnetic recording layer includes a perpendicular recording layer, a magnetic coupling layer and a writing assist layer. The perpendicular recording layer is a Co alloy layer containing an oxide disposed between the magnetic coupling layer and the substrate. The magnetic coupling layer is a ferromagnetic layer disposed between the perpendicular recording layer and the writing assist layer. The writing assist layer is a ferromagnetic layer disposed between the magnetic coupling layer and the protective layer. The saturation magnetization of the magnetic coupling layer is lower than the saturation magnetization of the perpendicular recording layer or the writing assist layer. The thickness of the magnetic coupling layer is 1 nm or more and 3 nm or less.
摘要翻译： 本发明的实施例提供一种具有基板，磁记录层和保护层的垂直磁记录介质。 磁记录层包括垂直记录层，磁耦合层和书写辅助层。 垂直记录层是包含设置在磁耦合层和基板之间的氧化物的Co合金层。 磁耦合层是设置在垂直记录层和书写辅助层之间的铁磁层。 写辅助层是设置在磁耦合层和保护层之间的铁磁层。 磁耦合层的饱和磁化强度低于垂直记录层或书写辅助层的饱和磁化强度。 磁耦合层的厚度为1nm以上3nm以下。
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公开(公告)号：US20110032638A1
公开(公告)日：2011-02-10
申请号：US12907943
申请日：2010-10-19
申请人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
发明人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium improved for fly ability, high in read signal quality, and capable of suppressing magnetic decay of recorded magnetization to be caused by stray fields. In one embodiment, a perpendicular recording layer is formed over a substrate with a soft magnetic underlayer therebetween, then an amorphous or nano-crystalline layer is formed between the substrate and the soft magnetic underlayer. The soft magnetic underlayer includes first and second amorphous soft magnetic layers, as well as a nonmagnetic layer formed between those first and second amorphous soft magnetic layers. The first and second amorphous soft magnetic layers are given uniaxial anisotropy in the radial direction of the substrate respectively and coupled with each other antiferromagnetically.
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公开(公告)号：US07056604B2
公开(公告)日：2006-06-06
申请号：US10452723
申请日：2003-06-03
申请人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
发明人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
CPC分类号： G11B5/7325 , G11B5/012 , G11B5/39 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12847 , Y10T428/12854 , Y10T428/26
摘要： A magnetic recording system includes an in-plane magnetic recording medium having a magnetic layer fabricated on a single underlayer or on a plurality of underlayers respectively fabricated on a substrate; a driver unit for driving the in-plane magnetic recording medium in a write direction; a magnetic head having a read unit and a write unit; a unit for moving the magnetic head relative to the in-plane magnetic recording medium; and a read/write signal processing unit for reading an output signal from the magnetic head and writing an input signal to the magnetic recording media, wherein the read unit of the magnetic head is a magnetoresistive head and the single underlayer or at least one of the plurality of underlayers is made of Co-containing amorphous material or fine crystal material, or is made of alloy material, the alloy material having as the main components at least one element selected from a group consisting of Cr, Mo, V and Ta and containing at least one element selected from a group consisting of B, C, P and Bi. The magnetic recording system can be realized which can read and write high density information and have high reliability.
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7.发明授权公开(公告)号：US07041393B2
公开(公告)日：2006-05-09
申请号：US10357368
申请日：2003-02-04
摘要： A perpendicular recording medium includes a perpendicular recording layer formed over a substrate through a soft magnetic underlayer, the soft magnetic underlayer then being arranged to include a plurality of soft magnetic layers physically separated by a non-magnetic layer, and further, the soft magnetic layers being formed of nanocrystals, with these arrangements, local magnetic loops are formed between the soft magnetic layers that are adjacent to each other through the non-magnetic layer, thereby suppressing spike noise and modulation that arises from the soft magnetic underlayer.
摘要翻译： 垂直记录介质包括通过软磁性底层在衬底上形成的垂直记录层，然后软磁性底层被布置成包括由非磁性层物理分离的多个软磁性层，此外，软磁性层 由纳米晶体形成，通过这些布置，通过非磁性层在彼此相邻的软磁性层之间形成局部磁环，从而抑制由软磁性底层产生的尖峰噪声和调制。
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公开(公告)号：US07026810B2
公开(公告)日：2006-04-11
申请号：US11054383
申请日：2005-02-10
IPC分类号： G01B7/00
CPC分类号： G11B5/667 , G11B5/00 , G11B5/012 , G11B20/10009 , G11B20/24 , G11B27/36 , G11B2005/001 , G11B2005/0029 , G11B2220/20
摘要： An object is to automatically detect the positions of spike noise, create a distribution diagram, and perform pass/fail decisions. The cross-correlation function of the signal waveform from a magnetic head 1 and a reference waveform simulating spike noise is used in extraction of spike noise. The number of peaks in the cross-correlation function exceeding a threshold value is counted, and quantitative evaluation of spike noise is performed.
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9.发明授权公开(公告)号：US06723457B2
公开(公告)日：2004-04-20
申请号：US10076655
申请日：2002-02-19
IPC分类号： G11B566
CPC分类号： G11B5/667 , G11B5/66 , G11B5/7325 , Y10S428/90
摘要： Provided are a double-layer perpendicular magnetic recording medium having a high medium S/N at an areal recording density of 50 Gbits or more per square inch, and a magnetic storage apparatus having excellent reliability with a low error rate. The perpendicular magnetic recording medium is formed by sequentially laminating a domain control layer, an amorphous soft magnetic underlayer, an intermediate layer, and a perpendicular recording layer on a substrate. The domain control layer is a triple-layer film formed by laminating a first polycrystalline soft magnetic layer, a disordered antiferromagnetic layer, and a second polycrystalline soft magnetic layer from a substrate side.
摘要翻译： 提供了一种双层垂直磁记录介质，其具有每平方英寸50G比特或更高的面积记录密度的高介质S / N，以及具有低误码率的可靠性优异的磁存储装置。 垂直磁记录介质通过在基板上顺序地层叠域控制层，非晶软磁底层，中间层和垂直记录层而形成。 畴控制层是通过从基板侧层压第一多晶软磁层，无序反铁磁层和第二多晶软磁层而形成的三层膜。
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公开(公告)号：US06574060B2
公开(公告)日：2003-06-03
申请号：US09799073
申请日：2001-03-06
申请人： Tetsuya Kanbe , Ichiro Tamai , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshio Takahashi , Fumiyoshi Kirino , Nagatugu Koiso , Satoshi Matsunuma
发明人： Tetsuya Kanbe , Ichiro Tamai , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshio Takahashi , Fumiyoshi Kirino , Nagatugu Koiso , Satoshi Matsunuma
IPC分类号： G11B502
CPC分类号： G11B5/7325 , C23C14/185 , G11B5/00 , G11B5/012 , G11B2005/001 , G11B2005/0016 , Y10S428/90 , Y10S428/928 , Y10T428/1107 , Y10T428/1121 , Y10T428/12507 , Y10T428/1266 , Y10T428/12667 , Y10T428/12674 , Y10T428/12819 , Y10T428/12826 , Y10T428/12868 , Y10T428/12944 , Y10T428/265
摘要： In a magnetic storage apparatus having a magnetic recording medium, a drive unit for driving this medium in a prespecified recording direction, a magnetic head assembly including a recorder section and reproduction section, a way to cause the magnetic head to move relatively with respect to the magnetic record medium, and a record/playback signal processor for performing signal inputting to the magnetic head and for effecting reproduction of an output signal from the magnetic head, the reproduction section of said magnetic head is composed of a magnetic head of the magnetoresistance effect type, while said magnetic record medium is structured including a substrate and a magnetic layer formed thereover with one or several underlayers being sandwiched therebetween, wherein at least one of hte underlayers is a specific layer that is made of amorphous or microcrystalline materials containing therein Ni as the principal or main component thereof and further containing at least one kind of element as selected from the group consisting of Nb and Ta.
摘要翻译： 在具有磁记录介质的磁存储装置中，用于以预先指定的记录方向驱动该介质的驱动单元，包括记录器部分和再现部分的磁头组件，使磁头相对于 磁记录介质和记录/重放信号处理器，用于对磁头进行信号输入并用于实现来自磁头的输出信号的再现，所述磁头的再现部分由磁阻效应型磁头 而所述磁记录介质被构造成包括衬底和形成在其上的一个或多个底层之间的磁性层，其中至少一个底层是由非晶或微晶材料制成的特定层，其中含有Ni作为 其主要成分或主要成分，还含有至少一种e 选自Nb和Ta组成的组。
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