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公开(公告)号：US4722869A
公开(公告)日：1988-02-02
申请号：US879614
申请日：1986-06-25
CPC分类号： G11B5/66 , Y10S428/928 , Y10T428/12465 , Y10T428/12493 , Y10T428/12674 , Y10T428/12708 , Y10T428/12722 , Y10T428/12792 , Y10T428/12806 , Y10T428/12861
摘要： Disclosed is a magnetic recording medium comprising a predetermined substrate having or not having a soft magnetic thin film provided thereon, a layer formed thereon for controlling the columnar crystal grain size in a thin magnetic film formed on the substrate, and the thin magnetic film provided on the columnar crystal grain size control layer. The above-mentioned columnar crystal grain size control layer is a film having a close-packed hexagonal lattice structure and made of one element selected from among Ru, Sc, Y, and Zn, or two or more elements selected from among Ru, Sc, Y, Zn, and Ti; or a film having a close-packed hexagonal lattice structure and made of Co or a Co-based alloy. The columnar crystal grain size control layer may consist of two layers, the under layer of which is made of one or more elements selected from among Si, Ge, and Sn.
摘要翻译： 公开了一种磁记录介质，其包括具有或不具有设置在其上的软磁性薄膜的预定基板，其上形成有用于控制形成在基板上的薄磁膜中的柱状晶粒尺寸的层，以及设置在该基板上的薄磁膜 柱状晶粒尺寸控制层。 上述柱状晶粒尺寸控制层是具有紧密堆积的六边形格子结构并由选自Ru，Sc，Y和Zn中的一种元素制成的膜，或者选自Ru，Sc， Y，Zn和Ti; 或具有紧密堆积的六边形格子结构并由Co或Co基合金制成的膜。 柱状晶粒尺寸控制层可以由两层构成，其下层由选自Si，Ge和Sn中的一种或多种元素制成。
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公开(公告)号：US4707756A
公开(公告)日：1987-11-17
申请号：US721715
申请日：1985-04-10
CPC分类号： G11B5/667 , G11B5/66 , G11B5/7325 , Y10S428/90 , Y10T428/12465 , Y10T428/12674
摘要： Disclosed is a perpendicular magnetic recording medium wherein an underlayer made of a material containing Si and/or Ge as its principal ingredient is deposited on a substrate, and a perpendicular magnetic film made of a Co-based alloy is deposited on the underlayer. With the perpendicular magnetic recording medium, the perpendicular magnetic film has an enhanced degree of C-axis orientation, and the bond strength between the perpendicular magnetic film and the substrate is also enhanced when the substrate is non-metallic.
摘要翻译： 公开了一种垂直磁记录介质，其中由含有Si和/或Ge作为其主要成分的材料制成的底层沉积在基板上，并且由Co基合金制成的垂直磁膜沉积在底层上。 对于垂直磁记录介质，垂直磁膜具有提高的C轴取向度，并且当衬底是非金属的时，垂直磁膜和衬底之间的结合强度也增强。
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3.发明授权公开(公告)号：US06403203B2
公开(公告)日：2002-06-11
申请号：US09379462
申请日：1999-08-24
申请人： Masaaki Futamoto , Nobuyuki Inaba , Yoshiyuki Hirayama , Yukio Honda , Kazuetsu Yoshida , Kenya Ito
发明人： Masaaki Futamoto , Nobuyuki Inaba , Yoshiyuki Hirayama , Yukio Honda , Kazuetsu Yoshida , Kenya Ito
IPC分类号： G11B5667
CPC分类号： H04B10/504 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12861 , Y10T428/12875 , Y10T428/24942 , Y10T428/2495 , Y10T428/24975 , Y10T428/26 , Y10T428/265
摘要： Magnetic recording medium includes at least two layers having different magnetic anisotropy constants formed on a substrate and the perpendicular magnetic anisotropy of the second magnetic film of those magnetic films, far from the substrate surface, made equal to or larger than that of the first magnetic film near to the substrate surface, thus improving the magnetic isolation of the first magnetic film near to the substrate surface.
摘要翻译： 磁记录介质包括形成于基板上的至少两层不同的磁各向异性常数，并且远离基板表面的这些磁性膜的第二磁性膜的垂直磁各向异性等于或大于第一磁性膜 靠近基板表面，从而改善靠近基板表面的第一磁性膜的磁隔离。
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4.发明授权公开(公告)号：US06183893B2
公开(公告)日：2001-02-06
申请号：US09285751
申请日：1999-04-05
申请人： Masaaki Futamoto , Yoshiyuki Hirayama , Kenya Ito , Kazuetsu Yoshida , Yukio Honda , Nobuyuki Inaba
发明人： Masaaki Futamoto , Yoshiyuki Hirayama , Kenya Ito , Kazuetsu Yoshida , Yukio Honda , Nobuyuki Inaba
IPC分类号： B32B1500
CPC分类号： G11B5/7325 , G11B5/00 , G11B5/012 , G11B5/66 , G11B2005/0029 , Y10S428/90 , Y10S428/928 , Y10T428/12861 , Y10T428/12875 , Y10T428/265
摘要： The present invention relates to a perpendicular magnetic recording medium and a magnetic storage apparatus which are improved to be suitable for high-density magnetic recording. An object thereof is to provide the perpendicular magnetic recording medium and the magnetic storage apparatus which have a low noise property for realizing a recording density of 10 Gb/in.2 or more and a high stability against thermal fluctuation. The perpendicular magnetic recording medium comprising a perpendicular magnetic film formed through an underlayer on a nonmagnetic substrate, wherein the underlayer comprises a material having a hexagonal close packed structure or an amorphous structure, and has a first underlayer nearer to the substrate, and a second underlayer having a hexagonal close packed structure formed on the first underlayer and a preferred growth orientation of [0001] and comprising a material capable of hetero-epitaxy growth onto the perpendicular magnetic film.
摘要翻译： 本发明涉及一种改进为适合于高密度磁记录的垂直磁记录介质和磁存储装置。 其目的是提供具有低噪声特性的垂直磁记录介质和磁存储装置，以实现10Gb / in.2以上的记录密度和对热波动的高稳定性。垂直磁记录介质包括 在非磁性基板上通过下层形成的垂直磁性膜，其中，所述下层包括具有六方密堆积结构或非晶结构的材料，并且具有更靠近所述基板的第一底层和具有六方密堆积结构的第二底层 形成在第一底层上，并且具有优选的生长方向，并且包括能够在垂直磁性膜上进行异质外延生长的材料。
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公开(公告)号：US06686070B1
公开(公告)日：2004-02-03
申请号：US09717213
申请日：2000-11-22
IPC分类号： G11B566
CPC分类号： G11B5/667 , G11B5/64 , G11B5/66 , Y10S428/90 , Y10T428/265
摘要： A perpendicular magnetic recording medium which has been improved to be suitable for high-density magnetic recording and a magnetic recording apparatus using the medium are provided. The magnetic back film of a dual-layer perpendicular recording medium is caused to be constituted by a plurality of layers, and a keeper layer 17 for keeping perpendicular magnetization and layers 13 and 15 for improving the recording efficiency of a recording head are functionally separated from one another. Further, the magnetization orientations of the soft magnetic films excluding the keeper layer are defined to be in the circumferential direction of the disk, whereby the frequency of occurrence of noise is decreased.
摘要翻译： 提供了已经改进以适合于高密度磁记录的垂直磁记录介质和使用介质的磁记录装置。 使双层垂直记录介质的磁背膜由多层构成，用于保持垂直磁化的保持层17和用于提高记录头的记录效率的层13和15在功能上与 另一个。 此外，除了保持层之外的软磁性膜的磁化取向被限定在圆盘的圆周方向上，从而噪声的发生频率降低。
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公开(公告)号：US06534164B2
公开(公告)日：2003-03-18
申请号：US09947411
申请日：2001-09-07
申请人： Masaaki Futamoto , Nobuyuki Inaba , Yoshiyuki Hirayama , Yukio Honda , Kazuetsu Yoshida , Kenya Ito
发明人： Masaaki Futamoto , Nobuyuki Inaba , Yoshiyuki Hirayama , Yukio Honda , Kazuetsu Yoshida , Kenya Ito
IPC分类号： G11B566
CPC分类号： H04B10/504 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12861 , Y10T428/12875 , Y10T428/24942 , Y10T428/2495 , Y10T428/24975 , Y10T428/26 , Y10T428/265
摘要： Magnetic recording medium includes at least two layers having different magnetic anisotropy constants formed on a substrate and the perpendicular magnetic anisotropy of the second magnetic film of those magnetic films, far from the substrate surface, made equal to or larger than that of the first magnetic film near to the substrate surface, thus improving the magnetic isolation.
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公开(公告)号：US5073460A
公开(公告)日：1991-12-17
申请号：US584363
申请日：1990-09-18
申请人： Masaaki Futamoto , Yukio Honda , Selichi Asada , Takashi Nishimura , Kazuetsu Yoshida , Heigo Ishihara
发明人： Masaaki Futamoto , Yukio Honda , Selichi Asada , Takashi Nishimura , Kazuetsu Yoshida , Heigo Ishihara
CPC分类号： G11B5/72 , G11B5/851 , Y10S428/90
摘要： A magnetic recording medium comprising a substrate, a ferromagnetic thin film formed on the substrate, and a protective film formed directly on the ferromagnetic think film, and a process for producing such magnetic recording medium. The expression "formed directly" refers to the technique for forming the protective film on the ferromagnetic thin film so that the interface therebetween is free from contamination by, for instance, conducting the protective film formation under the vacuum used when forming the ferromagnetic thin film.
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公开(公告)号：US4840844A
公开(公告)日：1989-06-20
申请号：US56661
申请日：1987-06-02
申请人： Masaaki Futamoto , Yukio Honda , Shinichiro Saito , Takashi Nishimura , Kazuetsu Yoshida , Toyoji Okuwaki , Hitoshi Iwata , Hiroyuki Suzuki , Kazushige Imagawa , Hideo Daimon , Osamu Kitakami , Hideo Fujiwara
发明人： Masaaki Futamoto , Yukio Honda , Shinichiro Saito , Takashi Nishimura , Kazuetsu Yoshida , Toyoji Okuwaki , Hitoshi Iwata , Hiroyuki Suzuki , Kazushige Imagawa , Hideo Daimon , Osamu Kitakami , Hideo Fujiwara
IPC分类号： G11B5/72
CPC分类号： G11B5/72 , Y10S428/90 , Y10T428/265 , Y10T428/30 , Y10T428/31678
摘要： A magnetic recording medium which comprises a non-magnetic substrate, a magnetic film formed on the substrate and a protective film provided on the magnetic film, the protective film being composed of at least two groups of element, the element in one group being at least one of B and C having a smaller atomic size, and a concentration of the element increasing from the interface side of the protective film with the magnetic film toward the opposite face side throughout the protective film has an improved durability against a magnetic head.
摘要翻译： 一种磁记录介质，其包括非磁性基板，形成在所述基板上的磁性膜和设置在所述磁性膜上的保护膜，所述保护膜由至少两组元件组成，一组中的元素至少为 B和C之一具有较小的原子尺寸，并且从保护膜与磁性膜的界面侧朝着保护膜的相对面侧增加的元素的浓度具有改善的对磁头的耐久性。
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公开(公告)号：US07399540B2
公开(公告)日：2008-07-15
申请号：US11582327
申请日：2006-10-18
IPC分类号： G11B5/66
CPC分类号： G11B5/667 , G11B5/64 , G11B5/66 , Y10S428/90 , Y10T428/265
摘要： A perpendicular magnetic recording medium which has been improved to be suitable for high-density magnetic recording and a magnetic recording apparatus using the medium are provided. The magnetic back film of a dual-layer perpendicular recording medium is caused to be constituted by a plurality of layers, and a keeper layer 17 for keeping perpendicular magnetization and layers 13 and 15 for improving the recording efficiency of a recording head are functionally separated from one another. Further, the magnetization orientations of the soft magnetic films excluding the keeper layer are defined to be in the circumferential direction of the disk, whereby the frequency of occurrence of noise is decreased.
摘要翻译： 提供了已经改进以适合于高密度磁记录的垂直磁记录介质和使用介质的磁记录装置。 使双层垂直记录介质的磁背膜由多层构成，用于保持垂直磁化的保持层17和用于提高记录头的记录效率的层13和15在功能上与 另一个。 此外，除了保持层之外的软磁性膜的磁化取向被限定在圆盘的圆周方向上，从而噪声的发生频率降低。
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公开(公告)号：US20070037018A1
公开(公告)日：2007-02-15
申请号：US11582327
申请日：2006-10-18
IPC分类号： G11B5/66
CPC分类号： G11B5/667 , G11B5/64 , G11B5/66 , Y10S428/90 , Y10T428/265
摘要： A perpendicular magnetic recording medium which has been improved to be suitable for high-density magnetic recording and a magnetic recording apparatus using the medium are provided. The magnetic back film of a dual-layer perpendicular recording medium is caused to be constituted by a plurality of layers, and a keeper layer 17 for keeping perpendicular magnetization and layers 13 and 15 for improving the recording efficiency of a recording head are functionally separated from one another. Further, the magnetization orientations of the soft magnetic films excluding the keeper layer are defined to be in the circumferential direction of the disk, whereby the frequency of occurrence of noise is decreased.
摘要翻译： 提供了已经改进以适合于高密度磁记录的垂直磁记录介质和使用介质的磁记录装置。 使双层垂直记录介质的磁背膜由多层构成，用于保持垂直磁化的保持层17和用于提高记录头的记录效率的层13和15在功能上与 另一个。 此外，除了保持层之外的软磁性膜的磁化取向被限定在圆盘的圆周方向上，从而噪声的发生频率降低。
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