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21.发明授权Magnetic recording medium and method for manufacturing magnetic recording medium 有权磁记录介质及磁记录介质的制造方法公开(公告)号：US07833639B2
公开(公告)日：2010-11-16
申请号：US11862789
申请日：2007-09-27
申请人： Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
发明人： Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
IPC分类号： G11B5/66
摘要： A magnetic recording medium for perpendicular magnetic recording includes a substrate, a granular layer having magnetic crystal grains exhibiting perpendicular magnetic anisotropy and nonmagnetic substances for magnetically separating the magnetic crystal grains from each other at grain boundaries of the magnetic crystal grains, and a continuous film layer having magnetic grains to be exchange-coupled to the magnetic crystal grains, the grain boundary width of the magnetic grains being smaller than that of the magnetic crystal grains, wherein separation regions for magnetically separating tracks from each other are disposed in regions between the tracks of the magnetic recording medium in at least the continuous film layer.
摘要翻译： 用于垂直磁记录的磁记录介质包括基板，具有垂直磁各向异性的磁性晶粒的颗粒层和用于在磁晶粒的晶界处磁性分离磁晶粒的非磁性物质，以及连续的膜层 具有与磁性晶粒交换耦合的磁性颗粒，磁性颗粒的晶界宽度小于磁性晶粒的晶界宽度，其中将磁道彼此分离磁道的分离区域设置在 所述磁记录介质至少在所述连续膜层中。
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22.发明申请公开(公告)号：US20100112379A1
公开(公告)日：2010-05-06
申请号：US12594092
申请日：2008-03-28
摘要： A vertical magnetic recording disc (100) includes a base (10), a magnetic recording layer (22), and a medium protection layer (26). The magnetic recording layer (22) is a ferromagnetic layer having a granular structure where a granular portion is formed. The medium protection layer (26) contains nitrogen (N) atoms and carbon (C) atoms with a number ratio (N/C) in a range from 0.050 to 0.150. In a Raman spectrum obtained by exciting the medium protection layer (26) by argon ion laser light of wavelength 514.5 nm, from which a fluorescence is removed, the peak ratio Dh/Gh is in a range from 0.70 to 0.95, when a D peak Dh appearing in the vicinity of 1350 cm−1 is separated from G peak Gh appearing in the vicinity of 1520 cm−1 by the Gauss function.
摘要翻译： 垂直磁记录盘（100）包括基座（10），磁记录层（22）和介质保护层（26）。 磁记录层（22）是形成粒状部的粒状结构的铁磁层。 介质保护层（26）含有氮（N）原子和碳（C）原子，其数量比（N / C）在0.050至0.150的范围内。 在通过从其去除荧光的波长514.5nm的氩离子激光激发介质保护层（26）而获得的拉曼光谱中，峰值比Dh / Gh在0.70至0.95的范围内，当D峰 出现在1350cm-1附近的Dh通过高斯函数与在1520cm -1附近出现的G峰Gh分离。
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23.发明授权公开(公告)号：US07220500B1
公开(公告)日：2007-05-22
申请号：US09540646
申请日：2000-03-31
申请人： Hiroshi Tomiyasu , Teiichiro Umezawa , Genshichi Hata , Takashi Morikawa , Masato Kobayashi , Masashi Suzuki , Satoshi Yokota , Tsuyoshi Watanabe
发明人： Hiroshi Tomiyasu , Teiichiro Umezawa , Genshichi Hata , Takashi Morikawa , Masato Kobayashi , Masashi Suzuki , Satoshi Yokota , Tsuyoshi Watanabe
CPC分类号： G11B5/732 , G11B5/40 , G11B5/455 , G11B5/66 , G11B5/7325
摘要： There is disclosed a magnetic recording medium in which a seed layer, under layer, intermediate layer, first magnetic layer, nonmagnetic layer, second magnetic layer, protective layer, and lubricant layer are successively laminated on a glass substrate, the nonmagnetic layer is constituted of an alloy containing Cr and C, and the magnetic layer is constituted of an alloy containing Co and Pt. The under layer includes at least the seed layer for finely dividing the crystal particles of the magnetic layer, the seed layer includes at least two or more layers of nonmagnetic films, and the intermediate layer formed of the material different from that of the nonmagnetic film is interposed between the nonmagnetic films. In measurement of the thermal stability of the magnetic recording medium, a head is used, the head includes a read/write element, and a write track width is twice or more as large as a read track width in the head.
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公开(公告)号：US09240204B2
公开(公告)日：2016-01-19
申请号：US13112323
申请日：2011-05-20
摘要： A perpendicular magnetic disk is provided. The disk includes, on a base and in the order from bottom, a first granular magnetic layer group including a plurality of magnetic layers each having a granular structure, a non-magnetic layer having Ru or a Ru alloy as a main component, a second granular magnetic layer group including a plurality of magnetic layers each having the granular structure, and an auxiliary recording layer having a CoCrPtRu alloy as a main component. Layers closer to a front surface among the plurality of magnetic layers included in the first granular magnetic layer group having an equal or smaller content of Pt. Layers closer to the front surface among the plurality of magnetic layers included in the second granular magnetic layer group having an equal or smaller content of Pt and having an equal or larger content of an oxide.
摘要翻译： 提供垂直磁盘。 该盘在基部上并且从底部开始依次包括具有粒状结构的多个磁性层的第一粒状磁性层组，具有Ru或Ru合金作为主要成分的非磁性层，第二 包括具有颗粒结构的多个磁性层的粒状磁性层组以及以CoCrPtRu合金为主要成分的辅助记录层。 更靠近Pt含量相同或更小的第一粒状磁性层组中包含的多个磁性层中的前表面。 在具有等于或更小含量的Pt并且具有相等或更大含量的氧化物的第二粒状磁性层组中包含的多个磁性层中更靠近前表面的层。
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25.发明授权Magnetic recording medium, and thermal stability measuring method and apparatus of magnetic recording medium 有权磁记录介质，以及磁记录介质的热稳定性测量方法和装置公开(公告)号：US07420886B2
公开(公告)日：2008-09-02
申请号：US11788426
申请日：2007-04-20
申请人： Hiroshi Tomiyasu , Teiichiro Umezawa , Genshichi Hata , Takashi Morikawa , Masato Kobayashi , Masashi Suzuki , Satoshi Yokota , Tsuyoshi Watanabe
发明人： Hiroshi Tomiyasu , Teiichiro Umezawa , Genshichi Hata , Takashi Morikawa , Masato Kobayashi , Masashi Suzuki , Satoshi Yokota , Tsuyoshi Watanabe
CPC分类号： G11B5/732 , G11B5/40 , G11B5/455 , G11B5/66 , G11B5/7325
摘要： There is disclosed a magnetic recording medium in which a seed layer, under layer, intermediate layer, first magnetic layer, nonmagnetic layer, second magnetic layer, protective layer, and lubricant layer are successively laminated on a glass substrate, the nonmagnetic layer is constituted of an alloy containing Cr and C, and the magnetic layer is constituted of an alloy containing Co and Pt. The under layer includes at least the seed layer for finely dividing the crystal particles of the magnetic layer, the seed layer includes at least two or more layers of nonmagnetic films, and the intermediate layer formed of the material different from that of the nonmagnetic film is interposed between the nonmagnetic films. In measurement of the thermal stability of the magnetic recording medium, a head is used, the head includes a read/write element, and a write track width is twice or more as large as a read track width in the head.
摘要翻译： 公开了一种磁性记录介质，其中在玻璃基板上依次层叠种子层，下层，中间层，第一磁性层，非磁性层，第二磁性层，保护层和润滑剂层，非磁性层由 含有Cr和C的合金，磁性层由含有Co和Pt的合金构成。 底层至少包括用于细分磁性层的晶粒的种子层，种子层包括至少两层或更多层非磁性膜，由不同于非磁性膜的材料形成的中间层是 介于非磁性膜之间。 在测量磁记录介质的热稳定性时，使用磁头，磁头包括读/写元件，写磁道宽度是磁头中读磁道宽度的两倍或更多。
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26.发明申请Magnetic recording medium, and thermal stability measuring method and apparatus of magnetic recording medium 有权磁记录介质，以及磁记录介质的热稳定性测量方法和装置公开(公告)号：US20070248844A1
公开(公告)日：2007-10-25
申请号：US11788426
申请日：2007-04-20
申请人： Hiroshi Tomiyasu , Teiichiro Umezawa , Genshichi Hata , Takashi Morikawa , Masato Kobayashi , Masashi Suzuki , Satoshi Yokota , Tsuyoshi Watanabe
发明人： Hiroshi Tomiyasu , Teiichiro Umezawa , Genshichi Hata , Takashi Morikawa , Masato Kobayashi , Masashi Suzuki , Satoshi Yokota , Tsuyoshi Watanabe
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/40 , G11B5/455 , G11B5/66 , G11B5/7325
摘要： There is disclosed a magnetic recording medium in which a seed layer, under layer, intermediate layer, first magnetic layer, nonmagnetic layer, second magnetic layer, protective layer, and lubricant layer are successively laminated on a glass substrate, the nonmagnetic layer is constituted of an alloy containing Cr and C, and the magnetic layer is constituted of an alloy containing Co and Pt. The under layer includes at least the seed layer for finely dividing the crystal particles of the magnetic layer, the seed layer includes at least two or more layers of nonmagnetic films, and the intermediate layer formed of the material different from that of the nonmagnetic film is interposed between the nonmagnetic films. In measurement of the thermal stability of the magnetic recording medium, a head is used, the head includes a read/write element, and a write track width is twice or more as large as a read track width in the head.
摘要翻译： 公开了一种磁性记录介质，其中在玻璃基板上依次层叠种子层，下层，中间层，第一磁性层，非磁性层，第二磁性层，保护层和润滑剂层，非磁性层由 含有Cr和C的合金，磁性层由含有Co和Pt的合金构成。 底层至少包括用于细分磁性层的晶粒的种子层，种子层包括至少两层或更多层非磁性膜，由不同于非磁性膜的材料形成的中间层是 介于非磁性膜之间。 在测量磁记录介质的热稳定性时，使用磁头，磁头包括读/写元件，写磁道宽度是磁头中读磁道宽度的两倍或更多。
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27.发明授权公开(公告)号：US07208236B2
公开(公告)日：2007-04-24
申请号：US11123065
申请日：2005-05-06
CPC分类号： G11B5/72 , Y10T428/1179 , Y10T428/265 , Y10T428/30
摘要： In a magnetic recording medium which comprises a substrate (1), a magnetic layer (3) formed on the substrate, a carbon-based protection layer (4) comprising carbon and formed on the magnetic layer, and a lubrication layer (5) formed on the carbon-based protection layer, the carbon-based protection layer comprises a hydrogenated carbon protection layer (4a) facing the magnetic layer and a nitrogenated carbon protection layer (4b) facing the lubrication layer. The hydrogenated carbon protection layer (4a) comprises carbon and hydrogen. The nitrogenated carbon protection layer (4b) includes no hydrogen but comprises carbon and nitrogen.
摘要翻译： 在包括基板（1）的磁记录介质中，形成在基板上的磁性层（3），包含碳并形成在磁性层上的碳基保护层（4）以及形成的润滑层（5） 在碳基保护层上，碳基保护层包括面向磁性层的氢化碳保护层（4a）和面向润滑层的氮化碳保护层（4b）。 氢化碳保护层（4a）包含碳和氢。 氮化碳保护层（4b）不包括氢，而是包括碳和氮。
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公开(公告)号：US06946191B2
公开(公告)日：2005-09-20
申请号：US10370722
申请日：2003-02-24
IPC分类号： G11B5/72
CPC分类号： G11B5/72 , Y10T428/1179 , Y10T428/265 , Y10T428/30
摘要： In a magnetic recording medium which comprises a substrate (1), a magnetic layer (3) formed on the substrate, a carbon-based protection layer (4) comprising carbon and formed on the magnetic layer, and a lubrication layer (5) formed on the carbon-based protection layer, the carbon-based protection layer comprises a hydrogenated carbon protection layer (4a) facing the magnetic layer and a nitrogenated carbon protection layer (4b) facing the lubrication layer. The hydrogenated carbon protection layer (4a) comprises carbon and hydrogen. The nitrogenated carbon protection layer (4b) includes no hydrogen but comprises carbon and nitrogen.
摘要翻译： 在包括基板（1）的磁记录介质中，形成在基板上的磁性层（3），包含碳并形成在磁性层上的碳基保护层（4）和形成的润滑层（5） 在碳基保护层上，碳基保护层包括面向磁性层的氢化碳保护层（4a）和面向润滑层的氮化碳保护层（4b）。 氢化碳保护层（4a）包含碳和氢。 氮化碳保护层（4b）不包括氢，而是包括碳和氮。
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公开(公告)号：US06670055B2
公开(公告)日：2003-12-30
申请号：US09925573
申请日：2001-08-09
IPC分类号： G11B566
CPC分类号： G11B5/851 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12847
摘要： A magnetic recording medium that is high coersive force, hard to receive influence of thermal fluctuation, and brings about a considerable improvement of S/N ratio, and in which at least an underlayer and a magnetic layer are sequentially laminated on a substrate, wherein a pre-coat layer is interposed between said underlayer and said substrate and said pre-coat layer is constructed by sequentially laminating a lower layer containing Ni and P and an upper layer made of a Cr alloy.
摘要翻译： 一种磁性记录介质，其具有高的强力，难以接受热波动的影响，并且导致S / N比的显着提高，并且其中至少底层和磁性层依次层压在基板上，其中 预涂层介于所述底层和所述基材之间，并且所述预涂层通过依次层压含有Ni和P的下层和由Cr合金制成的上层来构造。
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公开(公告)号：US08546000B2
公开(公告)日：2013-10-01
申请号：US13096307
申请日：2011-04-28
申请人： Teiichiro Umezawa
发明人： Teiichiro Umezawa
IPC分类号： G11B5/66
摘要： A perpendicular magnetic disk that includes, a base 110, a granular magnetic layer 160, and a auxiliary recording layer 180 disposed as an upper layer of the granular magnetic layer 160. The granular magnetic layer 160 has a granular structure in which a grain boundary portion is formed by segregation of a non-magnetic substance containing an oxide as a main component around magnetic particles containing a CoCrPt alloy grown in a columnar shape as a main component. The auxiliary recording layer 180 contains a CoCrPtRu alloy as a main component and has a film thickness of 1.5 nm to 4.0 nm. With this structure, the auxiliary recording layer can be thinned while maintaining the function thereof to improve SNR.
摘要翻译： 一种垂直磁盘，其包括基部110，粒状磁性层160和作为粒状磁性层160的上层设置的辅助记录层180.粒状磁性层160具有粒状结构，其中晶界部分 是以包含以柱状形成的CoCrPt合金为主成分的磁性粒子的周围的含有以氧化物为主成分的非磁性物质的偏析而形成的。 辅助记录层180含有CoCrPtRu合金作为主要成分，其膜厚为1.5nm至4.0nm。 利用这种结构，可以减小辅助记录层，同时保持其功能以提高SNR。
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