公开(公告)号：US20050204285A1

公开(公告)日：2005-09-15

申请号：US11054383

申请日：2005-02-10

申请人： Atsushi Kikugawa ,  Kiwamu Tanahashi ,  Yukio Honda ,  Masaaki Futamoto ,  Yoshiyuki Hirayama

发明人： Atsushi Kikugawa ,  Kiwamu Tanahashi ,  Yukio Honda ,  Masaaki Futamoto ,  Yoshiyuki Hirayama

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/73 ,  G11B5/84 ,  G11B20/10 ,  G11B20/24 ,  G11B27/36 ,  G06F17/00

CPC分类号： G11B5/667 ,  G11B5/00 ,  G11B5/012 ,  G11B20/10009 ,  G11B20/24 ,  G11B27/36 ,  G11B2005/001 ,  G11B2005/0029 ,  G11B2220/20

摘要： An object is to automatically detect the positions of spike noise, create a distribution diagram, and perform pass/fail decisions. The cross-correlation function of the signal waveform from a magnetic head 1 and a reference waveform simulating spike noise is used in extraction of spike noise. The number of peaks in the cross-correlation function exceeding a threshold value is counted, and quantitative evaluation of spike noise is performed.

摘要翻译： 目的是自动检测尖峰噪声的位置，创建分布图，并执行通过/失败决定。 在提取尖峰噪声中使用来自磁头1的信号波形的互相关函数和模拟尖峰噪声的参考波形。 对互相关函数中的峰值数超过阈值进行计数，并进行尖峰噪声的定量评估。

公开(公告)号：US06770389B2

公开(公告)日：2004-08-03

申请号：US10404446

申请日：2003-04-02

申请人： Masaaki Futamoto ,  Yoshiyuki Hirayama ,  Yukio Honda ,  Atsushi Kikukawa

发明人： Masaaki Futamoto ,  Yoshiyuki Hirayama ,  Yukio Honda ,  Atsushi Kikukawa

IPC分类号： G11B566

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/012 ,  G11B5/3909 ,  G11B5/64 ,  G11B5/667 ,  G11B5/7325 ,  G11B2005/001 ,  G11B2005/0016 ,  G11B2005/0029 ,  G11B2005/3996 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/26 ,  Y10T428/265

摘要： To provide an improved perpendicular magnetic recording medium suitable for high density magnetic recording. In a perpendicular magnetic recording medium comprising a perpendicular magnetic layer and protective layer provided on a non-magnetic substrate via a soft magnetic backlayer, a polycrystalline MgO film is inserted between the soft magnetic backlayer and perpendicular magnetic layer.

摘要翻译： 提供适合于高密度磁记录的改进的垂直磁记录介质。在包括垂直磁性层和通过软磁性背层设置在非磁性基底上的保护层的垂直磁记录介质中，多晶MgO膜插入在 软磁背层和垂直磁性层。

公开(公告)号：US06716516B2

公开(公告)日：2004-04-06

申请号：US10202875

申请日：2002-07-26

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.

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，从而改善磁隔离。

公开(公告)号：US6083599A

公开(公告)日：2000-07-04

申请号：US922763

申请日：1997-09-03

申请人： Yoshiyuki Hirayama ,  Masaaki Futamoto ,  Yukio Honda ,  Kazusuke Yamanaka ,  Kenya Ito

发明人： Yoshiyuki Hirayama ,  Masaaki Futamoto ,  Yukio Honda ,  Kazusuke Yamanaka ,  Kenya Ito

IPC分类号： G11B5/64 ,  G11B5/66

CPC分类号： G11B5/656 ,  G11B5/64 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/265

摘要： A perpendicular magnetic recording medium is provided by using a ferromagnetic polycrystalline thin film having main components of cobalt and chromium in which the coercivity is 1500 oersted or more and the fluctuation field of magnetic viscosity is 30 oersted or more; the film thickness is controlled within a range from 30 nm to 100 nm. A perpendicular magnetic recording medium with low noise and high output which is suited for high density recording can be obtained and a large capacity magnetic recording and reproducing apparatus can be provided by using this medium.

摘要翻译： 通过使用其中矫顽力为1500奥斯特或更高矫顽磁力的主要成分为钴和铬的铁磁性多晶薄膜，并且磁粘度的波动场为30奥斯特或更高，提供垂直磁记录介质; 膜厚控制在30nm至100nm的范围内。 可以获得适合于高密度记录的具有低噪声和高输出的垂直磁记录介质，并且可以通过使用该介质来提供大容量磁记录和再现装置。

公开(公告)号：US5851643A

公开(公告)日：1998-12-22

申请号：US832330

申请日：1997-03-26

申请人： Yukio Honda ,  Nobuyuki Inaba ,  Mikio Suzuki ,  Masaaki Futamoto ,  Hiroyuki Awano ,  Yoshibumi Matsuda ,  Yoshihiro Shiroishi

发明人： Yukio Honda ,  Nobuyuki Inaba ,  Mikio Suzuki ,  Masaaki Futamoto ,  Hiroyuki Awano ,  Yoshibumi Matsuda ,  Yoshihiro Shiroishi

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12632 ,  Y10T428/12674 ,  Y10T428/12806 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/1284 ,  Y10T428/12847 ,  Y10T428/12875 ,  Y10T428/12931 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/24975 ,  Y10T428/265

摘要： A magnetic recording media with a magnetic film made from at least two layers stacked via a non-magnetic intermediate layer, wherein the magnetic film is formed on a structure control underlayer situated on a non-magnetic substrate. A magnetic recording system is also disclosed which includes this magnetic recording media and a magnetic recording head for recording on and reading back from the magnetic recording media. The system further includes a disk drive system, which generates relative motion between the magnetic recording media and the magnetic recording head, and an actuator which determines an appropriate location, on the magnetic recording media, over which the head should be located.

摘要翻译： 一种具有通过非磁性中间层堆叠的至少两层制成的磁膜的磁记录介质，其中所述磁膜形成在位于非磁性基板上的结构控制底层上。 还公开了一种磁记录系统，其包括该磁记录介质和用于在磁记录介质上记录和读回的磁记录头。 该系统还包括一个在磁记录介质和磁记录头之间产生相对运动的磁盘驱动系统，以及致动器，其确定在磁记录介质上应该位于其上的适当位置。

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

IPC分类号： G11B5/72 ,  G11B5/851

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.

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。

公开(公告)号：US4722869A

公开(公告)日：1988-02-02

申请号：US879614

申请日：1986-06-25

申请人： Yukio Honda ,  Masaaki Futamoto ,  Kazuetsu Yoshida ,  Yasutaro Uesaka

发明人： Yukio Honda ,  Masaaki Futamoto ,  Kazuetsu Yoshida ,  Yasutaro Uesaka

IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/667 ,  G11B5/73 ,  G11B5/738

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。

公开(公告)号：US07138195B2

公开(公告)日：2006-11-21

申请号：US10833001

申请日：2004-04-28

申请人： Kiwamu Tanahashi ,  Atsushi Kikugawa ,  Yukio Honda ,  Masaaki Futamoto ,  Akira Ishikawa

发明人： Kiwamu Tanahashi ,  Atsushi Kikugawa ,  Yukio Honda ,  Masaaki Futamoto ,  Akira Ishikawa

IPC分类号： G11B5/667

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/3909 ,  G11B5/653 ,  G11B5/667 ,  G11B5/7325 ,  G11B2005/0029

摘要： A double layer perpendicular magnetic recording medium having a high medium S/N ratio at a recording density of 50 Gb/in2 or higher and a magnetic storage apparatus with a lower error rate and excellent reliability are provided. In a perpendicular magnetic recording medium in which a soft magnetic underlayer 12, an intermediate layer 13, and a perpendicular magnetic recording layer 14 are sequentially formed on a substrate 11, the intermediate layer 13 is made to be a non-magnetic amorphous alloy, in which Ni is a main component and Zr is contained, and the soft magnetic underlayer 12 is constituted of ferromagnetic nan-crystals precipitated by annealing.

摘要翻译： 提供了记录密度为50Gb / in以上的具有高介质S / N比的双层垂直磁记录介质和具有较低错误率和优良可靠性的磁存储装置。 在其中在基板11上依次形成软磁性底层12，中间层13和垂直磁记录层14的垂直磁记录介质中，使中间层13成为非磁性非晶合金， 该Ni是主成分，含有Zr，软磁性底层12由通过退火而析出的铁磁性纳米晶体构成。

公开(公告)号：US06759148B2

公开(公告)日：2004-07-06

申请号：US09785416

申请日：2001-02-20

申请人： Kiwamu Tanahashi ,  Atsushi Kikugawa ,  Yukio Honda ,  Masaaki Futamoto ,  Akira Ishikawa

发明人： Kiwamu Tanahashi ,  Atsushi Kikugawa ,  Yukio Honda ,  Masaaki Futamoto ,  Akira Ishikawa

IPC分类号： G11B562

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/3909 ,  G11B5/653 ,  G11B5/667 ,  G11B5/7325 ,  G11B2005/0029

摘要： A double layer perpendicular magnetic recording medium having a high medium S/N ratio at a recording density of 50 Gb/in2 or higher and a magnetic storage apparatus with a lower error rate and excellent reliability are obtained with a structure having soft magnetic underlayer 12, an intermediate layer 13 and a perpendicular magnetic recording layer 14 are sequentially formed on a substrate 11. The, intermediate layer 13 is made to be a non-magnetic amorphous alloy, in which Ni is a main component and Zr is contained, and the soft magnetic underlayer 12 is constituted of ferromagnetic nano-crystals precipitated by annealing.

摘要翻译： 在具有50Gb / in 2或更高的记录密度下具有高介质S / N比的双层垂直磁记录介质和具有较低误码率和优良可靠性的磁存储装置获得具有软磁性 底层12，中间层13和垂直磁记录层14依次形成在基板11上。中间层13被制成非磁性非晶合金，其中Ni是主要成分并且包含Zr， 软磁性底层12由退火后析出的铁磁性纳米晶体构成。