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：US5599580A

公开(公告)日：1997-02-04

申请号：US632355

申请日：1996-04-10

申请人： Masaaki Futamoto ,  Atsushi Nakamura ,  Nobuyuki Inaba ,  Yoshiyuki Hirayama ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Yukio Honda

发明人： Masaaki Futamoto ,  Atsushi Nakamura ,  Nobuyuki Inaba ,  Yoshiyuki Hirayama ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Yukio Honda

IPC分类号： G11B5/64 ,  G11B5/73 ,  G11B5/84 ,  B05D5/12

CPC分类号： G11B5/7325 ,  G11B5/65 ,  G11B5/656 ,  G11B5/7315 ,  G11B5/8404 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/1284 ,  Y10T428/12847 ,  Y10T428/12854 ,  Y10T428/24355 ,  Y10T428/265

摘要： A magnetic recording medium is constructed with a substrate made of glass, one or two underlayers, and a magnetic film. In order that the easy magnetization axis of the magnetic film is parallel to the magnetic film, an underlayer having an NaCl crystallographic structure is superposed on the substrate. A magnetic film made of a Co based alloy having a hexagonal close packed crystallographic structure is formed on this underlayer, putting an underlayer made of a material having a body centered cubic crystallographic structure therebetween at need. Magnetic anisotropy of the magnetic film is increased by forming grooves in a predetermined direction in a surface portion of the substrate. These grooves play a role also for defining the orientation of the underlayer made of the material having an NaCl crystallographic structure.

公开(公告)号：US5685958A

公开(公告)日：1997-11-11

申请号：US729381

申请日：1996-10-17

申请人： Masaaki Futamoto ,  Atsushi Nakamura ,  Nobuyuki Inaba ,  Yoshiyuki Hirayama ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Yukio Honda

发明人： Masaaki Futamoto ,  Atsushi Nakamura ,  Nobuyuki Inaba ,  Yoshiyuki Hirayama ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Yukio Honda

IPC分类号： G11B5/64 ,  G11B5/73 ,  G11B5/84 ,  C23C14/00

CPC分类号： G11B5/7325 ,  G11B5/65 ,  G11B5/656 ,  G11B5/7315 ,  G11B5/8404 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/1284 ,  Y10T428/12847 ,  Y10T428/12854 ,  Y10T428/24355 ,  Y10T428/265

摘要： A magnetic recording medium is constructed with a substrate made of glass, one or two underlayers, and a magnetic film. In order that the easy magnetization axis of the magnetic film is parallel to the magnetic film, an underlayer having an NaCl crystallographic structure is superposed on the substrate. A magnetic film made of a Co based alloy having a hexagonal close packed crystallographic structure is formed on this underlayer, putting an underlayer made of a material having a body centered cubic crystallographic structure therebetween at need. Magnetic anisotropy of the magnetic film is increased by forming grooves in a predetermined direction in a surface portion of the substrate. These grooves play a role also for defining the orientation of the underlayer made of the material having an NaCl crystallographic structure.

摘要翻译： 磁记录介质由玻璃制成的基板，一个或两个底层和磁性膜构成。 为了使磁性膜的易磁化轴平行于磁性膜，将具有NaCl晶体结构的底层重叠在基板上。 在该底层上形成由具有六方密堆积结晶结构的Co基合金制成的磁性膜，在需要时将其由具有体心立方晶体结构的材料制成的底层。 通过在衬底的表面部分中沿预定方向形成沟槽来增加磁性膜的磁各向异性。 这些槽也起到确定由具有NaCl晶体结构的材料制成的底层的取向的作用。

公开(公告)号：US5536585A

公开(公告)日：1996-07-16

申请号：US207609

申请日：1994-03-09

申请人： Masaaki Futamoto ,  Atsushi Nakamura ,  Nobuyuki Inaba ,  Yoshiyuki Hirayama ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Yukio Honda

发明人： Masaaki Futamoto ,  Atsushi Nakamura ,  Nobuyuki Inaba ,  Yoshiyuki Hirayama ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Yukio Honda

IPC分类号： G11B5/64 ,  G11B5/73 ,  G11B5/84 ,  G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/65 ,  G11B5/656 ,  G11B5/7315 ,  G11B5/8404 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/1284 ,  Y10T428/12847 ,  Y10T428/12854 ,  Y10T428/24355 ,  Y10T428/265

摘要： A magnetic recording medium is constructed with a substrate made of glass, one or two underlayers, and a magnetic film. In order that the easy magnetization axis of the magnetic film is parallel to the magnetic film, an underlayer having an NaCl crystallographic structure is superposed on the substrate. A magnetic film made of a Co based alloy having a hexagonal close packed crystallographic structure is formed on this underlayer, putting an underlayer made of a material having a body centered cubic crystallographic structure therebetween at need. Magnetic anisotropy of the magnetic film is increased by forming grooves in a predetermined direction in a surface portion of the substrate. These grooves play a role also for defining the orientation of the underlayer made of the material having an NaCl crystallographic structure.

摘要翻译： 磁记录介质由玻璃制成的基板，一个或两个底层和磁性膜构成。 为了使磁性膜的易磁化轴平行于磁性膜，将具有NaCl晶体结构的底层重叠在基板上。 在该底层上形成由具有六方密堆积结晶结构的Co基合金制成的磁性膜，在需要时将其由具有体心立方晶体结构的材料制成的底层。 通过在衬底的表面部分中沿预定方向形成沟槽来增加磁性膜的磁各向异性。 这些槽也起到确定由具有NaCl晶体结构的材料制成的底层的取向的作用。

公开(公告)号：US5325244A

公开(公告)日：1994-06-28

申请号：US843265

申请日：1992-02-28

申请人： Hisashi Takano ,  Kyo Akagi ,  Mikio Suzuki ,  Yoshibumi Matsuda ,  Takeshi Nakao ,  Yoshinori Miyamura ,  Fumio Kugiya ,  Masaaki Futamoto ,  Hideki Sawaguchi ,  Nobuyuki Inaba ,  Takayuki Munemoto ,  Kenji Mori ,  Hirotsugu Fukuoka ,  Tokuho Takagaki

发明人： Hisashi Takano ,  Kyo Akagi ,  Mikio Suzuki ,  Yoshibumi Matsuda ,  Takeshi Nakao ,  Yoshinori Miyamura ,  Fumio Kugiya ,  Masaaki Futamoto ,  Hideki Sawaguchi ,  Nobuyuki Inaba ,  Takayuki Munemoto ,  Kenji Mori ,  Hirotsugu Fukuoka ,  Tokuho Takagaki

IPC分类号： G11B5/02 ,  G11B5/00 ,  G11B5/39 ,  G11B5/55 ,  G11B5/596 ,  G11B5/60 ,  G11B5/65 ,  G11B5/66 ,  G11B5/74 ,  G11B5/82 ,  G11B13/04 ,  G11B21/10 ,  G11B5/58

CPC分类号： G11B5/3967 ,  G11B5/00 ,  G11B5/5552 ,  G11B5/59677 ,  G11B5/6005 ,  G11B5/74

摘要： A magnetic recording data storage system includes a magnetic recording medium having pits formed therein, the pits defining recording tracks on the magnetic recording medium and being arranged in a staggered manner relative to respective center lines of the recording tracks, a magnetic head including an inductive element for recording data on the recording tracks and a magnetoresistive element for reproducing data from the recording tracks, one of (1) a unit for magnetically producing a signal from the pits, and (2) an optical unit for optically producing a signal from the pits, the optical unit including a laser for illuminating the pits, servo means for positioning the head on the recording tracks based on the signal produced from the pits, the servo means including a dual-stage actuator including a rough movement portion and a fine movement portion.

摘要翻译： 磁记录数据存储系统包括其中形成有凹坑的磁记录介质，凹坑在磁记录介质上定义记录轨道并相对于记录轨道的相应中心线以交错方式布置，磁头包括电感元件 用于在记录磁道上记录数据和用于从记录磁道再现数据的磁阻元件，（1）用于从凹坑中产生信号的单元，以及（2）用于光学地产生来自凹坑的信号的光学单元 所述光学单元包括用于照亮所述凹坑的激光器，用于基于由所述凹坑产生的信号将所述磁头定位在所述记录磁道上的伺服装置，所述伺服装置包括双级致动器，所述双级致动器包括粗略运动部分和精细运动部分 。

公开(公告)号：US20050123806A1

公开(公告)日：2005-06-09

申请号：US11036064

申请日：2005-01-18

申请人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

发明人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

IPC分类号： G11B5/66 ,  G11B5/02 ,  G11B5/64 ,  G11B5/65 ,  G11B5/73

CPC分类号： G11B5/64 ,  Y10T428/12465 ,  Y10T428/12986 ,  Y10T428/265 ,  Y10T428/31

摘要： A magnetic recording medium having a substrate, an under-layer formed on the substrate, a magnetic layer formed on the substrate and a protective layer formed on the magnetic layer. The magnetic layer comprises Co, Cr and Pt with a thickness being from 10 nm to 22 nm. Further, a coercivity of the magnetic layer is not less than 2000 Oe, and a fluctuation field of magnetic viscosity at a field strength equal to remanence coercivity or coercivity is not less than 30 Oe.

摘要翻译： 具有基板的磁记录介质，在基板上形成的下层，形成在基板上的磁性层和形成在磁性层上的保护层。 磁性层包括厚度为10nm至22nm的Co，Cr和Pt。 此外，磁性层的矫顽力不小于2000Oe，磁场强度等于剩磁矫顽力或矫顽磁力的磁场粘度的波动范围不小于30Oe。

公开(公告)号：US06846577B2

公开(公告)日：2005-01-25

申请号：US10386456

申请日：2003-03-13

申请人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

发明人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

IPC分类号： G11B5/66 ,  G11B5/02 ,  G11B5/64 ,  G11B5/65 ,  G11B5/73

CPC分类号： G11B5/64 ,  Y10T428/12465 ,  Y10T428/12986 ,  Y10T428/265 ,  Y10T428/31

摘要： An ferromagnetic thin film is used to provide a magnetic recording medium whose noise is low and whose S/N value is high. The ferromagnetic thin film as the magnetic film of the magnetic recording medium is such that the fluctuation field of magnetic viscosity at 25° C. at the field strength equal to remanence coercivity or coercivity is not less than 15 oersteds and the coercivity is not less than 2000 oersteds.

摘要翻译： 铁磁性薄膜用于提供噪声低且S / N值高的磁记录介质。 作为磁记录介质的磁性膜的铁磁性薄膜使得在等于剩磁矫顽力或矫顽力的场强下，25℃下磁力粘度的波动范围不小于15奥斯特，矫顽力不小于 2000奥斯特。

公开(公告)号：US06613428B2

公开(公告)日：2003-09-02

申请号：US09849404

申请日：2001-05-07

申请人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

发明人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

IPC分类号： G11B564

CPC分类号： G11B5/64 ,  Y10T428/12465 ,  Y10T428/12986 ,  Y10T428/265 ,  Y10T428/31

摘要： A thin film magnetic recording medium including a magnetic layer having a fluctuation field defined as S/Xirr, where S is magnetic viscosity and Xirr is irreversible susceptibility Xirr. The fluctuation field of the magnetic layer is not less than 15 oersteds.

摘要翻译： 一种薄膜磁记录介质，包括具有定义为S / Xirr的波动场的磁性层，其中S是磁粘度和Xirr是不可逆的磁化率Xirr。 磁性层的波动场不小于15奥斯特。

公开(公告)号：US06310748B1

公开(公告)日：2001-10-30

申请号：US08521363

申请日：1995-08-31

申请人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

发明人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

IPC分类号： G11B566

CPC分类号： G11B5/64 ,  Y10T428/12465 ,  Y10T428/12986 ,  Y10T428/265 ,  Y10T428/31

摘要： A ferromagnetic thin film is used to provide a magnetic recording medium whose noise is low and whose S/N is high. The ferromagnetic thin film as the magnetic film of the magnetic recording medium is such that the fluctuation field of magnetic viscosity at 25° C. at the field strength equal to remanence coercivity or coercivity is not less than 15 oersteds and the coercivity is not less than 2000 oersteds.

摘要翻译： 铁磁薄膜用于提供噪声低且S / N高的磁记录介质。 作为磁记录介质的磁性膜的铁磁性薄膜使得在等于剩磁矫顽力或矫顽力的场强下，25℃下磁力粘度的波动范围不小于15奥斯特，矫顽力不小于 2000奥斯特。

公开(公告)号：US07157162B2

公开(公告)日：2007-01-02

申请号：US11036064

申请日：2005-01-18

申请人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

发明人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

IPC分类号： G11B5/65

CPC分类号： G11B5/64 ,  Y10T428/12465 ,  Y10T428/12986 ,  Y10T428/265 ,  Y10T428/31

摘要： A magnetic recording medium having a substrate, an under-layer formed on the substrate, a magnetic layer formed on the substrate and a protective layer formed on the magnetic layer. The magnetic layer comprises Co, Cr and Pt with a thickness being from 10 nm to 22 nm. Further, a coercivity of the magnetic layer is not less than 2000 Oe, and a fluctuation field of magnetic viscosity at a field strength equal to remanence coercivity or coercivity is not less than 30 Oe.

摘要翻译： 具有基板的磁记录介质，在基板上形成的下层，形成在基板上的磁性层和形成在磁性层上的保护层。 磁性层包括厚度为10nm至22nm的Co，Cr和Pt。 此外，磁性层的矫顽力不小于2000Oe，磁场强度等于剩磁矫顽力或矫顽磁力的磁场粘度的波动范围不小于30Oe。