-
公开(公告)号：US20080062583A1
公开(公告)日：2008-03-13
申请号：US11896486
申请日：2007-08-31
申请人： Shunji Takenoiri , Yasushi Sakai
发明人： Shunji Takenoiri , Yasushi Sakai
IPC分类号： G11B5/33
CPC分类号： G11B5/1278 , G11B5/65 , G11B5/66 , G11B5/7325
摘要： A perpendicular magnetic recording medium composed of a nonmagnetic substrate having a surface onto which are provided a plurality of layers including, in the order recited, a soft underlayer; a nonmagnetic coupling layer; a hard magnetic pinning layer which is antiferromagnetically coupled to the soft underlayer at ambient temperature via the nonmagnetic coupling layer and which has an axis of easy magnetization which extends in a direction which is perpendicular to that of the surface of the nonmagnetic substrate; a nonmagnetic intermediate layer; and a magnetic recording layer. Such a perpendicular magnetic recording medium has an improved medium performance, with reduced noise originating from the presence of the soft underlayer, and no erasure of recorded magnetization when influenced by an external magnetic field.
摘要翻译： 由具有表面的非磁性基板构成的垂直磁记录介质设置有多个层，所述多个层按顺序包括柔性底层; 非磁耦合层; 硬磁性钉扎层，其在环境温度下通过非磁性耦合层反铁磁耦合到软底层，并且具有沿与垂直于非磁性基底的表面垂直的方向延伸的易磁化轴; 非磁性中间层; 和磁记录层。 这样的垂直磁记录介质具有改进的介质性能，具有源于软底层的存在的降低的噪声，并且在被外部磁场影响时不会擦除记录的磁化。
-
2.发明授权公开(公告)号：US06884520B2
公开(公告)日：2005-04-26
申请号：US10314898
申请日：2002-12-09
CPC分类号： G11B5/732 , G11B5/65 , G11B5/7325 , G11B5/8404 , Y10T428/12465 , Y10T428/12806 , Y10T428/12847 , Y10T428/1291 , Y10T428/12931 , Y10T428/25
摘要： A perpendicular magnetic recording medium has a nonmagnetic substrate, a nonmagnetic underlayer, a magnetic layer, a protective film, and a liquid lubrication layer sequentially laminated on the substrate. The nonmagnetic layer is composed of a metal or alloy having a hcp crystal structure. The magnetic recording layer consists of ferromagnetic crystal grains and a nonmagnetic grain boundary phase mainly composed of an oxide surrounding the grains. A seed layer of a metal or alloy having a fcc crystal structure can be provided under the nonmagnetic underlayer, and a nonmagnetic alignment control layer can be provided under the seed layer. The recording medium can provide high output and low noise by improving the alignment of the magnetic recording layer, reducing the initial growth layer in the magnetic recording layer, and minimizing the grain size of the magnetic recording layer.
摘要翻译： 垂直磁记录介质具有顺序地层叠在基板上的非磁性基板，非磁性底层，磁性层，保护膜和液体润滑层。 非磁性层由具有hcp晶体结构的金属或合金构成。 磁记录层由铁磁晶粒和主要由围绕晶粒的氧化物组成的非磁性晶界相组成。 可以在非磁性底层下方设置具有fcc晶体结构的金属或合金的种子层，并且在种子层下方可以设置非磁性取向控制层。 通过改善磁记录层的对准，减小磁记录层中的初始生长层，并使磁记录层的晶粒尺寸最小化，记录介质可以提供高输出和低噪声。
-
公开(公告)号：US09028984B2
公开(公告)日：2015-05-12
申请号：US12595805
申请日：2008-04-11
申请人： Yasushi Sakai , Shunji Takenoiri
发明人： Yasushi Sakai , Shunji Takenoiri
CPC分类号： G11B5/667 , G11B5/647 , G11B5/65 , G11B5/7325
摘要： A perpendicular magnetic recording medium includes a nonmagnetic substrate, and a soft magnetic layer, a first orientation control layer, a second orientation control layer, a nonmagnetic intermediate layer, a magnetic recording layer, and a protective layer layered sequentially on the nonmagnetic substrate. The first orientation control layer includes a thin film having a face-centered cubic (fcc) structure. The magnetic recording layer includes a thin film layer having ferromagnetic crystal grains and nonmagnetic grain boundaries surrounding the ferromagnetic crystal grains, the ferromagnetic crystal grains including a CoPt alloy having ferromagnetic properties, and the nonmagnetic grain boundaries including an oxide or a nitride. The nonmagnetic intermediate layer includes a thin film containing Ru. The second orientation control layer includes an alloy thin film having an element selected from among Ni and Fe and having the fcc structure, the second orientation control layer having a saturation magnetic flux density Bs of 1 T or lower.
摘要翻译： 垂直磁记录介质包括非磁性衬底，以及在非磁性衬底上依次分层的软磁性层，第一取向控制层，第二取向控制层，非磁性中间层，磁记录层和保护层。 第一取向控制层包括具有面心立方（fcc）结构的薄膜。 磁记录层包括具有铁磁晶粒和包围铁磁晶粒的非磁性晶粒边界的薄膜层，包含具有铁磁特性的CoPt合金的铁磁晶粒和包含氧化物或氮化物的非磁性晶界。 非磁性中间层包括含有Ru的薄膜。 第二取向控制层包括具有选自Ni和Fe中的元素并具有fcc结构的合金薄膜，第二取向控制层的饱和磁通密度Bs为1T以下。
-
4.发明授权公开(公告)号：US07993764B2
公开(公告)日：2011-08-09
申请号：US11255579
申请日：2005-10-21
申请人： Shunji Takenoiri , Yasushi Sakai
发明人： Shunji Takenoiri , Yasushi Sakai
IPC分类号： G11B5/66
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/8404
摘要： A perpendicular magnetic recording medium includes a soft magnetic backing layer, an underlayer, a nonmagnetic intermediate layer, and a magnetic recording layer sequentially deposited on a nonmagnetic substrate. The underlayer can contain cobalt, nickel, and iron and have an fcc structure and exhibit soft magnetic property. The underlayer preferably contains nickel in a range of 30 to 88 at % and iron in a range of 0.1 to 22 at %. The underlayer can further contain Si, B, Nb, N, Ta, Al, Pd, Cr, or Mo. The nonmagnetic intermediate layer preferably contains at least one element selected from Ru, Re, Pd, Ir, Pt, and Rh. The magnetic recording layer preferably has a granular structure. A seed layer can be further provided between the soft magnetic backing layer and the underlayer.
摘要翻译： 垂直磁记录介质包括顺序沉积在非磁性基底上的软磁背衬层，底层，非磁性中间层和磁记录层。 底层可以包含钴，镍和铁，并且具有fcc结构并表现出软磁性。 底层优选含有30〜88at％范围内的镍和0.1〜22at％的铁。 底层可以进一步含有Si，B，Nb，N，Ta，Al，Pd，Cr或Mo。非磁性中间层优选含有选自Ru，Re，Pd，Ir，Pt和Rh中的至少一种元素。 磁记录层优选具有粒状结构。 可以在软磁背衬层和底层之间进一步设置种子层。
-
公开(公告)号：US20100233515A1
公开(公告)日：2010-09-16
申请号：US12722581
申请日：2010-03-12
IPC分类号： G11B5/706
CPC分类号： G11B5/66
摘要： A perpendicular type of magnetic recording medium has a multi-layered recording structure made up of a plurality of ferro-magnetic layers and a non-magnetic layer interposed between the plurality of ferro-magnetic layers, and the perpendicular magnetic anisotropy energy of the lower ferro-magnetic layer is greater than the perpendicular magnetic anisotropy energy of the upper ferro-magnetic layer. Accordingly, the lower ferro-magnetic layer may be easily magnetically reversed by a magnetic field applied during a write operation. Thus, the perpendicular type of magnetic recording medium exhibits an enhanced thermal stability and write-ability.
摘要翻译： 垂直型的磁记录介质具有由多个铁磁层和介于多个铁磁层之间的非磁性层构成的多层记录结构，并且下铁的垂直磁各向异性能 磁性层大于上磁铁层的垂直磁各向异性能。 因此，通过在写入操作期间施加的磁场，可以容易地使低铁磁性层磁性地反转。 因此，垂直型磁记录介质表现出增强的热稳定性和写入能力。
-
6.发明申请公开(公告)号：US20050186450A1
公开(公告)日：2005-08-25
申请号：US11042793
申请日：2005-01-25
申请人： Shunji Takenoiri , Yasushi Sakai
发明人： Shunji Takenoiri , Yasushi Sakai
摘要： A perpendicular magnetic recording medium is disclosed in which each magnetic crystal grain in the magnetic recording layer has a multilayer structure and has a configuration like a truncated cone shape, in which the crystal grain of the final layer deposited in the film surface side at the final stage is smaller than the diameter of the crystal grain in the initial layer deposited on the substrate side at the initial stage. The invention improves S/N (signal output to noise ratio) by enhancing signal output and reducing noises. The medium is produced by a simple manufacturing method suitable for mass production, and provides a medium of high recording density by improving recording resolution.
摘要翻译： 公开了一种垂直磁记录介质，其中磁记录层中的每个磁晶粒具有多层结构，并具有类似截头圆锥形的结构，其中最终层的晶粒在最终的膜表面侧沉积 阶段小于在初始阶段沉积在基板侧的初始层中的晶粒的直径。 本发明通过增强信号输出和降低噪声来改善S / N（信号输出信噪比）。 该介质是通过适合批量生产的简单制造方法生产的，并通过提高记录分辨率提供高记录密度的介质。
-
公开(公告)号：US06706318B2
公开(公告)日：2004-03-16
申请号：US10189197
申请日：2002-07-05
申请人： Shunji Takenoiri , Yasushi Sakai
发明人： Shunji Takenoiri , Yasushi Sakai
IPC分类号： B05D512
CPC分类号： G11B5/7325 , G11B5/74 , G11B5/84 , H01F10/30 , H01F41/32
摘要： A perpendicular magnetic recording media and method of manufacturing therefore includes a nonmagnetic substrate, an underlayer deposited on the nonmagnetic substrate, and a magnetic recording layer formed on the underlayer, quickly heated, and quenched. A protective layer is deposited on the magnetic recording layer, and a liquid lubricant layer is deposited on the protective layer, to improve an uniaxial anisotropy Ku and a coercive force Hc of the magnetic recording layer.
摘要翻译： 因此，垂直磁记录介质和制造方法包括非磁性基底，沉积在非磁性基底上的底层和形成在底层上的磁记录层，被快速加热和淬火。 保护层沉积在磁记录层上，并且液体润滑层沉积在保护层上，以提高单轴各向异性Ku和磁记录层的矫顽力Hc。
-
公开(公告)号：US10026429B2
公开(公告)日：2018-07-17
申请号：US12722581
申请日：2010-03-12
IPC分类号： G11B5/66
CPC分类号： G11B5/66
摘要： A perpendicular type of magnetic recording medium has a multi-layered recording structure made up of a plurality of ferro-magnetic layers and a non-magnetic layer interposed between the plurality of ferro-magnetic layers, and the perpendicular magnetic anisotropy energy of the lower ferro-magnetic layer is greater than the perpendicular magnetic anisotropy energy of the upper ferro-magnetic layer. Accordingly, the lower ferro-magnetic layer may be easily magnetically reversed by a magnetic field applied during a write operation. Thus, the perpendicular type of magnetic recording medium exhibits an enhanced thermal stability and write-ability.
-
公开(公告)号：US08895164B2
公开(公告)日：2014-11-25
申请号：US12457394
申请日：2009-06-09
申请人： Tuqiang Li , Shunji Takenoiri , Yuko Ueki
发明人： Tuqiang Li , Shunji Takenoiri , Yuko Ueki
摘要： A perpendicular magnetic recording medium, which includes a nonmagnetic substrate, and a first underlayer in the form of a soft magnetic under-layer (SUL), a second underlayer, an intermediate layer, a magnetic recording layer, a protective layer, and a lubricant layer sequentially laminated on the nonmagnetic substrate. The SUL has a plurality of SUL layers including a type-A SUL layer, a plurality of type-B SUL layers including at least two adjacent type-B SUL layers, and a nonmagnetic metal spacer layer disposed between the two adjacent type-B SUL layers. The type-A SUL layer may include a material selected from Co, Fe and Ni, a material selected from Cr, V and Ti, and a material selected from W, Zr, Ta and Nb. Each of the type-B SUL layers is in antiferromagnetic coupling, and may include a material selected from Co, Fe and Ni, a material selected from Cr, V and Ti, and a material selected from W, Zr, Ta and Nb.
摘要翻译： 包括非磁性衬底的垂直磁记录介质和软磁性底层（SUL），第二底层，中间层，磁记录层，保护层和润滑剂形式的第一底层 层顺序层压在非磁性基板上。 SUL具有包括A型SUL层，包括至少两个相邻B型SUL层的多个B型SUL层和设置在两个相邻B型SUL层之间的非磁性金属间隔层的多个SUL层 层。 A型SUL层可以包括选自Co，Fe和Ni的材料，选自Cr，V和Ti的材料，以及选自W，Zr，Ta和Nb的材料。 B型SUL层中的每一层均为反铁磁耦合，并且可以包括选自Co，Fe和Ni的材料，选自Cr，V和Ti的材料，以及选自W，Zr，Ta和Nb的材料。
-
公开(公告)号：US08105707B2
公开(公告)日：2012-01-31
申请号：US12595618
申请日：2008-04-11
IPC分类号： G11B5/66
CPC分类号： G11B5/7325 , G11B5/65
摘要： A perpendicular magnetic recording medium, which includes a nonmagnetic substrate, and a soft magnetic layer, a first orientation control layer, a nonmagnetic intermediate layer, and a perpendicular magnetic recording layer formed sequentially on the nonmagnetic substrate. The perpendicular magnetic recording medium further includes a second orientation control layer provided between the first orientation control layer and the nonmagnetic intermediate layer. The nonmagnetic intermediate layer has hexagonal close-packed (hcp) structure. The first orientation control layer has a face-centered cubic (fcc) structure. The second orientation control layer includes Co and Cr, and has the hcp structure.
摘要翻译： 包括非磁性基板的垂直磁记录介质和顺序地形成在非磁性基板上的软磁性层，第一取向控制层，非磁性中间层和垂直磁记录层。 垂直磁记录介质还包括设置在第一取向控制层和非磁性中间层之间的第二取向控制层。 非磁性中间层具有六方密堆积（hcp）结构。 第一取向控制层具有面心立方（fcc）结构。 第二取向控制层包括Co和Cr，具有hcp结构。
-
-
-
-
-
-
-
-
-
搜索结果
31 条记录 (耗时 0.012 秒)