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公开(公告)号：US06887565B2
公开(公告)日：2005-05-03
申请号：US10306361
申请日：2002-11-27
CPC分类号： G11B5/7325 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/265
摘要： An inplane magnetic recording medium having high S/N and thermal stability and a reliable magnetic storage device having surface recording density of 50 megabit/mm2 or more is described. The magnetic recording medium includes magnetic layers formed on a nonmagnetic substrate with a plurality of ground layers therebetween, at least one of the ground layers formed from an alloy of a body-centered cubic structure containing Cr as a main component and B of from 2 atomic % to 12 atomic %. Main components of the magnetic layers include a lower magnetic layer containing Co and Cr of from 10 atomic % to 16 atomic %, with film thickness of from 1.5 nm to 4.5 nm, and an upper magnetic layer containing Co, coupling anti-ferromagnetically with the lower magnetic layer through nonmagnetic intermediate layers.
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公开(公告)号：US07338725B2
公开(公告)日：2008-03-04
申请号：US11072042
申请日：2005-03-03
CPC分类号： G11B5/7325 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/265
摘要： An inplane magnetic recording medium having high S/N and thermal stability and a reliable magnetic storage device having surface recording density of 50 megabit/mm2 or more is described. The magnetic recording medium includes magnetic layers formed on a nonmagnetic substrate with a plurality of ground layers therebetween, at least one of the ground layers formed from an alloy of a body-centered cubic structure containing Cr as a main component and B of from 2 atomic % to 12 atomic %. Main components of the magnetic layers include a lower magnetic layer containing Co and Cr of from 10 atomic % to 16 atomic %, with film thickness of from 1.5 nm to 4.5 nm, and an upper magnetic layer containing Co, coupling anti-ferromagnetically with the lower magnetic layer through nonmagnetic intermediate layers.
摘要翻译： 描述了具有高S / N和热稳定性的内置磁记录介质和具有50兆比特/平方毫米或更高的表面记录密度的可靠的磁存储装置。 磁记录介质包括形成在非磁性基底上的磁性层，其间具有多个接地层，至少一个接地层由以Cr为主要成分的体心立方结构的合金形成，B为2原子 ％至12原子％。 磁性层的主要成分包括含有10原子％〜16原子％的Co和Cr的下部磁性层，膜厚为1.5nm〜4.5nm，上部磁性层为Co，与铁素体 通过非磁性中间层降低磁性层。
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公开(公告)号：US07163756B2
公开(公告)日：2007-01-16
申请号：US10733928
申请日：2003-12-10
申请人： Tomoo Yamamoto , Yotsuo Yahisa , Tatsuya Hinoue , Hidekazu Kashiwase , Tetsuya Kanbe , Hiroyuki Suzuki
发明人： Tomoo Yamamoto , Yotsuo Yahisa , Tatsuya Hinoue , Hidekazu Kashiwase , Tetsuya Kanbe , Hiroyuki Suzuki
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/66 , G11B5/7325
摘要： A large-capacity, low-cost, longitudinal magnetic recording medium capable of ultra-high-density recording of 70 Gigabits or more per square inch is disclosed. The longitudinal magnetic recording medium of the present invention comprises a first seed layer, a second seed layer, a first underlayer, a second underlayer, and a magnetic layer, which are formed on a nonmagnetic substrate in this order. A material containing at least Al and any one of Ru and Re is used to form the second seed layer, and a material containing at least any one of Co and Ni and one or both of Al and Ti is used to form the first underlayer. It is also possible to use Cr or a Cr alloy containing Cr and at least one element selected from the constituent element group A consisting of Ti, Mo, and W for forming the second seed layer.
摘要翻译： 公开了能够以每平方英寸70吉比特或更多的超高密度记录的大容量，低成本的纵向磁记录介质。 本发明的纵向磁记录介质包括依次形成在非磁性基板上的第一种子层，第二籽晶层，第一底层，第二底层和磁性层。 使用至少包含Al和Ru和Re中的任何一种的材料来形成第二种子层，并且使用包含Co和Ni中的至少一种以及Al和Ti中的一种或两种的材料来形成第一底层。 也可以使用含有Cr的Cr或Cr合金和选自由Ti，Mo和W构成的构成元素组A中的至少一种元素来形成第二种子层。
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公开(公告)号：US20050084716A1
公开(公告)日：2005-04-21
申请号：US10985045
申请日：2004-11-10
CPC分类号： G11B5/7325 , G11B5/66 , Y10S428/90 , Y10T428/1121 , Y10T428/12465 , Y10T428/12854 , Y10T428/12861
摘要： It is an object of the present invention to provide a high reliability magnetic storage apparatus capable of performing writing and reading back of high density information. The magnetic storage apparatus is so configured as to have a longitudinal magnetic recording medium including: a magnetic layer formed on a non-magnetic substrate via a plurality of underlayers; the magnetic layer including a lower magnetic layer containing Ru in an amount of not less than 3 at % to not more than 30 at %, and Cr in an amount of not less than 0 at % to not more than 18 at %, and further containing at least one of B or C in an amount of not less than 0 at % to not more than 20 at %, and an upper magnetic layer containing Co as a main component disposed thereon via a non-magnetic intermediate layer.
摘要翻译： 本发明的目的是提供一种能够执行高密度信息的写入和读回的高可靠性磁存储装置。 磁存储装置被配置为具有纵向磁记录介质，其包括：通过多个底层在非磁性基板上形成的磁性层; 所述磁性层包括含有不小于3原子％至不超过30原子％的量的Ru的下磁性层，并且不少于0原子％至不大于18原子％的Cr， 含有不小于0at％至不超过20at％的B或C中的至少一个，以及经由非磁性中间层设置在其上的Co作为主要成分的上磁性层。
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公开(公告)号：US07267894B2
公开(公告)日：2007-09-11
申请号：US10656746
申请日：2003-09-04
CPC分类号： G11B5/7325 , G11B5/656 , G11B5/66
摘要： A magnetic recording apparatus including a drive unit to drive the magnetic recording medium, a compound-type magnetic head, a means to move the magnetic head relative to the magnetic recording medium, and a means to process recording and retrieving signals generated by the magnetic head. The magnetic recording medium comprises a non-magnetic substrate and a magnetic layer formed thereon with three underlayers interposed inbetween. The magnetic layer is composed of a plurality of layers of Co-based alloy of hexagonal close-packed structure which are antiferromagnetically coupled to one another through a non-magnetic intermediate layer, said three underlayers including an amorphous alloy layer, a Ta layer, and a Cr-based alloy layer of body-centered cubic structure.
摘要翻译： 一种磁记录装置，包括驱动磁记录介质的驱动单元，复合型磁头，磁头相对于磁记录介质移动的装置，以及处理由磁头产生的信号的记录和检索装置 。 磁记录介质包括非磁性基底和形成在其上的三层底层之间的磁性层。 磁性层由多层通过非磁性中间层反铁磁耦合的六方密堆积结构的Co基合金层构成，所述三个底层包括非晶合金层，Ta层和 体心立方结构的Cr基合金层。
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公开(公告)号：US20050164037A1
公开(公告)日：2005-07-28
申请号：US11072042
申请日：2005-03-03
CPC分类号： G11B5/7325 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/265
摘要： An inplane magnetic recording medium having high S/N and thermal stability and a reliable magnetic storage device having surface recording density of 50 megabit/mm2 or more is described. The magnetic recording medium includes magnetic layers formed on a nonmagnetic substrate with a plurality of ground layers therebetween, at least one of the ground layers formed from an alloy of a body-centered cubic structure containing Cr as a main component and B of from 2 atomic % to 12 atomic %. Main components of the magnetic layers include a lower magnetic layer containing Co and Cr of from 10 atomic % to 16 atomic %, with film thickness of from 1.5 nm to 4.5 nm, and an upper magnetic layer containing Co, coupling anti-ferromagnetically with the lower magnetic layer through nonmagnetic intermediate layers.
摘要翻译： 描述了具有高S / N和热稳定性的内置磁记录介质和具有50兆比特/平方毫米或更高的表面记录密度的可靠的磁存储装置。 磁记录介质包括形成在非磁性基底上的磁性层，其间具有多个接地层，至少一个接地层由以Cr为主要成分的体心立方结构的合金形成，B为2原子 ％至12原子％。 磁性层的主要成分包括含有10〜16原子％的Co和Cr的下部磁性层，膜厚度为1.5nm〜4.5nm，以及含有Co的上部磁性层，反铁磁共振 通过非磁性中间层降低磁性层。
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公开(公告)号：US06830837B2
公开(公告)日：2004-12-14
申请号：US10046987
申请日：2002-01-17
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/66 , Y10S428/90 , Y10T428/1121 , Y10T428/12465 , Y10T428/12854 , Y10T428/12861
摘要： It is an object of the present invention to provide a high reliability magnetic storage apparatus capable of performing writing and reading back of high density information. The magnetic storage apparatus is so configured as to have a longitudinal magnetic recording medium including: a magnetic layer formed on a non-magnetic substrate via a plurality of underlayers; the magnetic layer including a lower magnetic layer containing Ru in an amount of not less than 3 at % to not more than 30 at %, and Cr in an amount of not less than 0 at % to not more than 18 at %, and further containing at least one of B or C in an amount of not less than 0 at % to not more than 20 at %, and an upper magnetic layer containing Co as a main component disposed thereon via a non-magnetic intermediate layer.
摘要翻译： 本发明的目的是提供一种能够执行高密度信息的写入和读回的高可靠性磁存储装置。 磁存储装置被配置为具有纵向磁记录介质，其包括：通过多个底层在非磁性基板上形成的磁性层; 所述磁性层包括含有不小于3原子％至不超过30原子％的量的Ru的下磁性层，并且不少于0原子％至不大于18原子％的Cr， 含有不小于0at％至不超过20at％的B或C中的至少一个，以及经由非磁性中间层设置在其上的Co作为主要成分的上磁性层。
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8.发明授权Magnetic recording medium having a cobalt-based alloy film for high density recording and magnetic storage device using same 有权具有用于高密度记录的钴基合金膜和使用它的磁存储装置的磁记录介质公开(公告)号：US07876530B2
公开(公告)日：2011-01-25
申请号：US12387164
申请日：2009-04-28
申请人： Tatsuya Hinoue , Yotsuo Yahisa , Tomoo Yamamoto , Jo Inagaki , Hiroyuki Suzuki , Masae Suzuki, legal representative , Hidekazu Kashiwase
发明人： Tatsuya Hinoue , Yotsuo Yahisa , Tomoo Yamamoto , Jo Inagaki , Hiroyuki Suzuki , Hidekazu Kashiwase
CPC分类号： G11B5/65 , G11B5/656 , G11B5/66 , H01F10/16 , H01F10/265
摘要： In one embodiment, a magnetic recording medium comprises an underlying film, a magnetic film and a protective film formed in this order on a substrate. The magnetic film is a cobalt-base alloy film containing chromium and has a plurality of magnetic layers stacked without interposition of any non-magnetic layer. The plural magnetic layers comprise first, second and third magnetic layers. The first magnetic layer is disposed between the underlying film and the second magnetic layer. The second magnetic layer is disposed between the first magnetic layer and the third magnetic layer. The third magnetic layer is disposed between the second magnetic layer and the protective film. The concentration of chromium contained in the first magnetic layer is lower than that of chromium contained in the second magnetic layer. The thickness of the first magnetic layer is smaller than that of the second magnetic layer. The magnetic layers which overlie the first magnetic layer further contain platinum and boron. The concentration of chromium contained in the third magnetic layer is lower than that of chromium contained in the second magnetic layer.
摘要翻译： 在一个实施例中，磁记录介质包括在衬底上依次形成的下面的膜，磁性膜和保护膜。 磁性膜是含有铬的钴基合金膜，并且具有堆叠而不插入任何非磁性层的多个磁性层。 多个磁性层包括第一，第二和第三磁性层。 第一磁性层设置在下面的膜和第二磁性层之间。 第二磁性层设置在第一磁性层和第三磁性层之间。 第三磁性层设置在第二磁性层和保护膜之间。 第一磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。 第一磁性层的厚度小于第二磁性层的厚度。 覆盖在第一磁性层上的磁性层还含有铂和硼。 第三磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。
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9.发明授权公开(公告)号：US07261958B2
公开(公告)日：2007-08-28
申请号：US10067333
申请日：2002-02-07
CPC分类号： G11B5/66 , G11B5/00 , G11B5/012 , G11B2005/0002 , G11B2005/0016
摘要： A magnetic recording medium having at least two magnetic layers and a non-magnetic intermediate layer held between them. The first magnetic layer (which is closer to the substrate than the non-magnetic intermediate layer) is formed from an alloy composed of Co, Pr, and Cr, with Pt content being 3-9 at %. The second magnetic layer (which is farther from the substrate than the non-magnetic intermediate layer) is formed from a Co-based alloy containing Pt, Cr, and B. The first and second magnetic layers are magnetized in the mutually antiparallel direction in the absence of an applied magnetic field.The magnetic recording medium is characterized by good thermal stability for recording bits, high recording resolution, and low media noise. It is suitable for a magnetic storage for high recording density with high reliability.
摘要翻译： 具有至少两个磁性层和保持在它们之间的非磁性中间层的磁记录介质。 第一磁性层（其比非磁性中间层更靠近基板）由Co，Pr和Cr组成的合金形成，Pt含量为3-9原子％。 第二磁性层（其比非磁性中间层离基板更远）由含有Pt，Cr和B的Co基合金形成。第一和第二磁性层在相互反平行的方向上被磁化 不存在施加的磁场。 磁记录介质的特征在于用于记录位的良好热稳定性，高记录分辨率和低介质噪声。 适用于具有高可靠性的高记录密度的磁存储。
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10.发明申请Magnetic recording medium for high density recording and magnetic storage device using same 有权用于高密度记录和磁存储装置的磁记录介质公开(公告)号：US20090258253A1
公开(公告)日：2009-10-15
申请号：US12387164
申请日：2009-04-28
申请人： Tatsuya Hinoue , Yotsuo Yahisa , Tomoo Yamamoto , Joe Inagaki , Hiroyuko Suzuki , Hidekazu Kashiwase
发明人： Tatsuya Hinoue , Yotsuo Yahisa , Tomoo Yamamoto , Joe Inagaki , Hiroyuko Suzuki , Hidekazu Kashiwase
IPC分类号： G11B5/66
CPC分类号： G11B5/65 , G11B5/656 , G11B5/66 , H01F10/16 , H01F10/265
摘要： In one embodiment, a magnetic recording medium comprises an underlying film, a magnetic film and a protective film formed in this order on a substrate. The magnetic film is a cobalt-base alloy film containing chromium and has a plurality of magnetic layers stacked without interposition of any non-magnetic layer. The plural magnetic layers comprise first, second and third magnetic layers. The first magnetic layer is disposed between the underlying film and the second magnetic layer. The second magnetic layer is disposed between the first magnetic layer and the third magnetic layer. The third magnetic layer is disposed between the second magnetic layer and the protective film. The concentration of chromium contained in the first magnetic layer is lower than that of chromium contained in the second magnetic layer. The thickness of the first magnetic layer is smaller than that of the second magnetic layer. The magnetic layers which overlie the first magnetic layer further contain platinum and boron. The concentration of chromium contained in the third magnetic layer is lower than that of chromium contained in the second magnetic layer.
摘要翻译： 在一个实施例中，磁记录介质包括在衬底上依次形成的下面的膜，磁性膜和保护膜。 磁性膜是含有铬的钴基合金膜，并且具有堆叠而不插入任何非磁性层的多个磁性层。 多个磁性层包括第一，第二和第三磁性层。 第一磁性层设置在下面的膜和第二磁性层之间。 第二磁性层设置在第一磁性层和第三磁性层之间。 第三磁性层设置在第二磁性层和保护膜之间。 第一磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。 第一磁性层的厚度小于第二磁性层的厚度。 覆盖在第一磁性层上的磁性层还含有铂和硼。 第三磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。
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