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21.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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22.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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23.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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公开(公告)号：US20120189872A1
公开(公告)日：2012-07-26
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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公开(公告)号：US20110104516A1
公开(公告)日：2011-05-05
申请号：US12934979
申请日：2009-03-25
申请人： Teiichiro Umezawa
发明人： Teiichiro Umezawa
IPC分类号： G11B5/65
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/66
摘要： An object of the present invention is to increase an electromagnetic transducing characteristic (in particular, SNR) by further promoting separation and isolation of magnetic grains of a magnetic recording layer (122) in a perpendicular magnetic recording medium (100). Thus, a typical structure of the perpendicular magnetic recording medium (100) according to the present invention includes, on a substrate (110), at least a non-magnetic granular layer (120) having a granular structure in which a grain boundary part including one or a plurality of oxides is formed between non-magnetic grains each continuously grown in a columnar shape and a magnetic recording layer (122) formed continuously with the non-magnetic granular layer (120) and having a granular structure in which a grain boundary part including one or a plurality of oxides is formed between magnetic grains continuously grown in a columnar shape in this order, and at least one oxide included in the grain boundary part of the non-magnetic granular layer (120) and at least one oxide included in the grain boundary part of the magnetic recording layer (122) are oxides of a same composition.
摘要翻译： 本发明的目的是通过进一步促进垂直磁记录介质（100）中的磁记录层（122）的磁性颗粒的分离和隔离来增加电磁感应特性（特别是SNR）。 因此，根据本发明的垂直磁记录介质（100）的典型结构在基板（110）上至少包括具有颗粒结构的非磁性颗粒层（120），其中包括 在圆柱状连续生长的非磁性颗粒和与非磁性颗粒层（120）连续形成的磁记录层（122）之间形成一个或多个氧化物，并且具有颗粒结构，其中晶界 依次形成以柱状连续生长的磁性颗粒和包含在非磁性粒状层（120）的晶界部分中的至少一种氧化物和包含至少一种氧化物的包含一种或多种氧化物的部分 在磁记录层（122）的晶界部分是具有相同组成的氧化物。
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公开(公告)号：US20100209740A1
公开(公告)日：2010-08-19
申请号：US12666561
申请日：2008-09-26
IPC分类号： G11B5/706
摘要： [Object] The present invention provides a perpendicular magnetic recording medium that can reduce noise by further size reduction and isolation of magnetic grains in a magnetic recording layer and can increase the recording density by improvement of the SNR.[Means for Solution] A typical configuration of a perpendicular magnetic recording medium according to the present invention is a perpendicular magnetic recording medium 100 having a magnetic recording layer 122 with a granular structure in which non-magnetic grain boundary portions are formed between magnetic grains that have grown continuously in a columnar shape, wherein the grain boundary portions contain a plurality of kinds of oxides.
摘要翻译： 本发明提供一种垂直磁记录介质，其可以通过磁记录层中的磁性颗粒的进一步的尺寸减小和隔离来降低噪声，并且可以通过提高SNR来提高记录密度。 [解决方案]根据本发明的垂直磁记录介质的典型配置是具有具有粒状结构的磁记录层122的垂直磁记录介质100，其中在磁性颗粒之间形成非磁性晶界部分， 连续生长成柱状，其中晶界部分含有多种氧化物。
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30.发明申请公开(公告)号：US20100196740A1
公开(公告)日：2010-08-05
申请号：US12665271
申请日：2008-09-24
摘要： A perpendicular magnetic recording medium of the invention is characterized by having, on a disk substrate 110, a soft magnetic layer 14, a magnetic recording layer 22, a continuous layer 24 magnetically continuous in the in-plane direction of the substrate, a blocking layer 25 for blocking shock imposed on the continuous layer, and a medium protective layer 28 containing carbon formed on the blocking layer.
摘要翻译： 本发明的垂直磁记录介质的特征在于，在盘基板110上具有在基板的面内方向上磁连续的软磁层14，磁记录层22，连续层24，阻挡层 25，用于阻挡施加在连续层上的冲击，以及包含形成在阻挡层上的碳的介质保护层28。
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