公开(公告)号：US07273667B2

公开(公告)日：2007-09-25

申请号：US10856094

申请日：2004-05-28

申请人： Tatsuya Hinoue ,  Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

发明人： Tatsuya Hinoue ,  Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

IPC分类号： G11B5/716

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/66 ,  Y10T428/12931 ,  Y10T428/265

摘要： A magnetic recording medium capable of attaining high in-plane recording density of 100 Mbits or more per 1 mm2 is provided. Magnetic recording medium is provided in which underlayers, a first magnetic layer, a first intermediate layer, a second magnetic layer, a second intermediate layer, a third magnetic layer, a protection layer and lubrication layer are formed in this order above a substrate. Each of the third magnetic layer and the second magnetic layer comprises a Co-based alloy containing at least Pt, Cr and B. The concentration of Pt contained in the second magnetic layer is not more than that in the third magnetic layer.

摘要翻译： 提供能够获得每1mm 2的100Mb以上的高平面内记录密度的磁记录介质。 提供磁性记录介质，其中在衬底上方依次形成底层，第一磁性层，第一中间层，第二磁性层，第二中间层，第三磁性层，保护层和润滑层。 第三磁性层和第二磁性层中的每一个包含至少含有Pt，Cr和B的Co基合金。第二磁性层中所含的Pt的浓度不大于第三磁性层中的浓度。

公开(公告)号：US07517597B2

公开(公告)日：2009-04-14

申请号：US11012387

申请日：2004-12-14

申请人： Tatsuya Hinoue ,  Hiroyuki Suzuki ,  Tetsuya Kanbe ,  Koji Sakamoto

发明人： Tatsuya Hinoue ,  Hiroyuki Suzuki ,  Tetsuya Kanbe ,  Koji Sakamoto

IPC分类号： G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/66

摘要： Embodiments of the present invention provide a magnetic recording medium for use in high-reliable magnetic recording apparatus capable of reading/writing information with high density. In one embodiment, a magnetic recording apparatus includes a magnetic recording medium, a driver for driving the medium in a recording direction, a compound type magnetic head having an electromagnetic induction type magnetic head for recording and a spin-valve type magnetic head for reading in combination, a mechanism to move the head relative to the medium, and a read/write signal processing module for the head. The magnetic recording medium has a magnetic layer formed by way of a first underlayer, a second underlayer and a third underlayer on a substrate. The first underlayer comprises an alloy of an amorphous structure, the second underlayer comprises a W element or a W-containing alloy layer, the third underlayer comprises one or more Cr-based alloy layers of a body-centered cubic structure, and the magnetic layer comprises one or more Co-based alloy layers of a hexagonal close-packed structure.

摘要翻译： 本发明的实施例提供一种用于能够以高密度读取/写入信息的高可靠性磁记录装置的磁记录介质。 在一个实施例中，磁记录装置包括磁记录介质，用于在记录方向上驱动介质的驱动器，具有用于记录的电磁感应型磁头的复合型磁头和用于读取的旋转型磁头 组合，相对于介质移动头的机构，以及用于头部的读/写信号处理模块。 磁记录介质具有通过第一底层，第二底层和第三底层在基底上形成的磁性层。 第一底层包括非晶结构的合金，第二底层包括W元素或含W合金层，第三底层包括一个或多个体心立方结构的Cr基合金层，并且磁性层 包括一个或多个六方密堆积结构的Co基合金层。

公开(公告)号：US20060269793A1

公开(公告)日：2006-11-30

申请号：US11440504

申请日：2006-05-24

申请人： Tatsuya Hinoue ,  Koji Sakamoto ,  Hiroyuki Suzuki ,  Takuya Kojima

发明人： Tatsuya Hinoue ,  Koji Sakamoto ,  Hiroyuki Suzuki ,  Takuya Kojima

IPC分类号： G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/66

摘要： A longitudinal magnetic recording medium having high medium S/N ratio, no problem for overwriting characteristics, excellent bit error rate and also sufficient thermal stability is provided. In one embodiment, a medium has a substrate, an underlayer film formed above the substrate, a magnetic film formed by stacking a first magnetic layer, a second magnetic layer, a third magnetic layer, a non-magnetic intermediate layer and a fourth magnetic layer over the underlayer film, and a protective film formed over the magnetic film, in which each of the magnetic layers of the magnetic film comprises a cobalt-based alloy containing chromium, the first magnetic layer has the least thickness among all the magnetic layers, the second, the third and the fourth magnetic layer each further contain platinum and boron, Brt of the second magnetic layer is smaller than Brt of the third magnetic layer, Brt of the third magnetic layer is smaller than Brt of the fourth magnetic layer, and the ratio of Brt of the fourth magnetic layer to Brt of the entire magnetic film is within a range from about 40% to about 55%.

摘要翻译： 提供具有高介质S / N比的纵向磁记录介质，不存在重写特性问题，优异的误码率和足够的热稳定性。 在一个实施例中，介质具有衬底，在衬底上形成的下层膜，通过层叠第一磁性层，第二磁性层，第三磁性层，非磁性中间层和第四磁性层形成的磁性膜 以及形成在磁性膜上的保护膜，其中磁性膜的每个磁性层包含含有铬的钴基合金，第一磁性层在所有磁性层中的厚度最小， 第二磁性层的第三磁性层和第四磁性层的每一个都含有铂和硼，第二磁性层的Brt小于第三磁性层的Brt，第三磁性层的Brt小于第四磁性层的Brt， 第四磁性层的Brt与整个磁性膜的Brt的比例在约40％至约55％的范围内。

公开(公告)号：US20060051620A1

公开(公告)日：2006-03-09

申请号：US11223407

申请日：2005-09-09

申请人： Tatsuya Hinoue ,  Jo Inagaki ,  Hiroyuki Suzuki ,  Kohei Tozawa

发明人： Tatsuya Hinoue ,  Jo Inagaki ,  Hiroyuki Suzuki ,  Kohei Tozawa

IPC分类号： G11B5/66 ,  G11B5/23

CPC分类号： G11B5/7325 ,  G11B5/23 ,  G11B5/656 ,  G11B5/66

摘要： A magnetic recording medium for attaining high areal recording density and a magnetic recording apparatus are provided. In one embodiment, a magnetic recording medium is provided which includes underlayers, a first magnetic layer, a first intermediate layer, a second magnetic layer, a second intermediate layer, a third magnetic layer, a protective layer and a lubricant layer formed in sequence on a substrate. The first magnetic layer comprises a cobalt-based alloy, and the second magnetic layer and the third magnetic layer each comprises a Co-based alloy containing platinum, chromium and boron. The concentration of chromium contained in the third magnetic layer is less than that in the second magnetic layer, the concentration of chromium contained in the third magnetic layer is about 15 at. % or less, and the first intermediate layer comprises ruthenium or an alloy having ruthenium as a main ingredient.

摘要翻译： 提供了用于实现高面积记录密度的磁记录介质和磁记录装置。 在一个实施例中，提供了一种磁记录介质，其包括底层，第一磁性层，第一中间层，第二磁性层，第二中间层，第三磁性层，保护层和润滑剂层， 底物。 第一磁性层包括钴基合金，第二磁性层和第三磁性层各自包含含有铂，铬和硼的Co基合金。 第三磁性层中含有的铬的浓度小于第二磁性层中的铬浓度，第三磁性层中含有的铬的浓度为约15at。 ％以下，第一中间层包含钌或以钌为主要成分的合金。

公开(公告)号：US20050142389A1

公开(公告)日：2005-06-30

申请号：US11012387

申请日：2004-12-14

申请人： Tatsuya Hinoue ,  Hiroyuki Suzuki ,  Tetsuya Kanbe ,  Koji Sakamoto

发明人： Tatsuya Hinoue ,  Hiroyuki Suzuki ,  Tetsuya Kanbe ,  Koji Sakamoto

IPC分类号： G11B5/738 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/73

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/66

摘要： Embodiments of the present invention provide a magnetic recording medium for use in high-reliable magnetic recording apparatus capable of reading/writing information with high density. In one embodiment, a magnetic recording apparatus includes a magnetic recording medium, a driver for driving the medium in a recording direction, a compound type magnetic head having an electromagnetic induction type magnetic head for recording and a spin-valve type magnetic head for reading in combination, a mechanism to move the head relative to the medium, and a read/write signal processing module for the head. The magnetic recording medium has a magnetic layer formed by way of a first underlayer, a second underlayer and a third underlayer on a substrate. The first underlayer comprises an alloy of an amorphous structure, the second underlayer comprises a W element or a W-containing alloy layer, the third underlayer comprises one or more Cr-based alloy layers of a body-centered cubic structure, and the magnetic layer comprises one or more Co-based alloy layers of a hexagonal close-packed structure.

摘要翻译： 本发明的实施例提供一种用于能够以高密度读取/写入信息的高可靠性磁记录装置的磁记录介质。 在一个实施例中，磁记录装置包括磁记录介质，用于在记录方向上驱动介质的驱动器，具有用于记录的电磁感应型磁头的复合型磁头和用于读取的自旋阀型磁头 组合，相对于介质移动头的机构，以及用于头部的读/写信号处理模块。 磁记录介质具有通过第一底层，第二底层和第三底层在基底上形成的磁性层。 第一底层包括非晶结构的合金，第二底层包括W元素或含W合金层，第三底层包括一个或多个体心立方结构的Cr基合金层，并且磁性层 包括一个或多个六方密堆积结构的Co基合金层。

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

IPC分类号： G11B5/66 ,  B32B3/02

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。

公开(公告)号：US07267894B2

公开(公告)日：2007-09-11

申请号：US10656746

申请日：2003-09-04

申请人： Tetsuya Kanbe ,  Tatsuya Hinoue ,  Yotsuo Yahisa ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki

发明人： Tetsuya Kanbe ,  Tatsuya Hinoue ,  Yotsuo Yahisa ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki

IPC分类号： G11B5/66 ,  G11B5/70

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。

公开(公告)号：US20050053805A1

公开(公告)日：2005-03-10

申请号：US10856094

申请日：2004-05-28

申请人： Tatsuya Hinoue ,  Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

发明人： Tatsuya Hinoue ,  Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/73 ,  G11B5/738

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/66 ,  Y10T428/12931 ,  Y10T428/265

摘要： A magnetic recording medium capable of attaining high in-plane recording density of 100 Mbits or more per 1 mm2 is provided. Magnetic recording medium is provided in which underlayers, a first magnetic layer, a first intermediate layer, a second magnetic layer, a second intermediate layer, a third magnetic layer, a protection layer and lubrication layer are formed in this order above a substrate. Each of the third magnetic layer and the second magnetic layer comprises a Co-based alloy containing at least Pt, Cr and B. The concentration of Pt contained in the second magnetic layer is not more than that in the third magnetic layer.

摘要翻译： 提供能够获得每1mm 2的100Mb以上的高面内记录密度的磁记录介质。 提供磁性记录介质，其中在衬底上方依次形成底层，第一磁性层，第一中间层，第二磁性层，第二中间层，第三磁性层，保护层和润滑层。 第三磁性层和第二磁性层中的每一个包含至少含有Pt，Cr和B的Co基合金。第二磁性层中所含的Pt的浓度不大于第三磁性层中的浓度。

公开(公告)号：US07532436B2

公开(公告)日：2009-05-12

申请号：US11223603

申请日：2005-09-09

申请人： Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

发明人： Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

IPC分类号： G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/31 ,  G11B5/656 ,  G11B5/66

摘要： A longitudinal magnetic recording medium having a high medium S/N, with no problems in view of the overwrite characteristic, excellent in the bit error rate and sufficiently stable also to thermal fluctuations is provided. In one embodiment, a first underlayer, second underlayer, and a third underlayer are formed on a substrate and, further, a first magnetic layer, a spacer layer including Ru as a main ingredient, a second magnetic layer, and a third magnetic layer are formed in adjacent with each other in this order. The thickness of the second magnetic layer is made larger than the thickness of the third magnetic layer and the total for the concentrations of cobalt and platinum obtained in the second magnetic layer is not more than the total for the concentrations of cobalt and platinum contained in the third magnetic layer.

摘要翻译： 提供具有高介质S / N的纵向磁记录介质，考虑到重写特性没有问题，具有优异的误码率和足够稳定的热波动。 在一个实施例中，在基板上形成第一底层，第二底层和第三底层，此外，第一磁性层，包括Ru作为主要成分的间隔层，第二磁性层和第三磁性层是 以这种顺序彼此相邻地形成。 使第二磁性层的厚度大于第三磁性层的厚度，并且在第二磁性层中获得的钴和铂的浓度的总和不超过包含在第二磁性层中的钴和铂的浓度的总和 第三磁性层。

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。