公开(公告)号：US08098448B2

公开(公告)日：2012-01-17

申请号：US12639926

申请日：2009-12-16

Applicant: Yoshihiko Maeda ,  Masaomi Ikeda ,  Nobuhiro Kuwamura ,  Toshihiko Tsunokawa ,  Akira Osaki

Inventor： Yoshihiko Maeda ,  Masaomi Ikeda ,  Nobuhiro Kuwamura ,  Toshihiko Tsunokawa ,  Akira Osaki

IPC: G11B5/09

CPC classification number: G11B20/1258 ,  G11B2020/1242 ,  G11B2020/1282 ,  G11B2020/1292 ,  G11B2220/2516

Abstract: A method for dividing a data area on a disk into a plurality of concentric zones and determining a format for each zone so that data tracks in the zone have the same number of data sectors. The method includes dividing a data area into a plurality of zones with provisional boundaries. The method also includes determining a linear recording density for a selected zone. The method further includes selecting the number of data sectors per data track corresponding to the determined linear recording density from specified values. Moreover, the method includes resetting a boundary of the zone at a new boundary shifted from the provisional boundary according to a selected value.

Abstract translation: 一种用于将盘上的数据区划分成多个同心区并且确定每个区的格式的方法，使得区中的数据轨迹具有相同数量的数据扇区。 该方法包括将数据区域划分成具有临时边界的多个区域。 该方法还包括确定所选区域的线性记录密度。 该方法还包括从指定值中选择对应于所确定的线性记录密度的每个数据轨道的数据扇区数。 此外，该方法包括根据所选择的值从临时边界移位的新边界复位区域的边界。

公开(公告)号：US20110085259A1

公开(公告)日：2011-04-14

申请号：US12639926

申请日：2009-12-16

Applicant: Yoshihiko MAEDA ,  Masaomi Ikeda ,  Nobuhiro Kuwamura ,  Toshihiko Tsunokawa ,  Akira Osaki

Inventor： Yoshihiko MAEDA ,  Masaomi Ikeda ,  Nobuhiro Kuwamura ,  Toshihiko Tsunokawa ,  Akira Osaki

IPC: G11B5/09

CPC classification number: G11B20/1258 ,  G11B2020/1242 ,  G11B2020/1282 ,  G11B2020/1292 ,  G11B2220/2516

Abstract: A method for dividing a data area on a disk into a plurality of concentric zones and determining a format for each zone so that data tracks in the zone have the same number of data sectors. The method includes dividing a data area into a plurality of zones with provisional boundaries. The method also includes determining a linear recording density for a selected zone. The method further includes selecting the number of data sectors per data track corresponding to the determined linear recording density from specified values. Moreover, the method includes resetting a boundary of the zone at a new boundary shifted from the provisional boundary according to a selected value.

Abstract translation: 一种用于将盘上的数据区划分成多个同心区并且确定每个区的格式的方法，使得区中的数据轨迹具有相同数量的数据扇区。 该方法包括将数据区域划分成具有临时边界的多个区域。 该方法还包括确定所选区域的线性记录密度。 该方法还包括从指定值中选择对应于所确定的线性记录密度的每个数据轨道的数据扇区数。 此外，该方法包括根据所选择的值从临时边界移位的新边界复位区域的边界。

公开(公告)号：US5723198A

公开(公告)日：1998-03-03

申请号：US258923

申请日：1994-06-13

Applicant: Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Akira Ishikawa ,  Futoshi Tomiyama ,  Kazuetsu Yoshida ,  Tomoo Yamamoto ,  Yotsuo Yahisa ,  Akira Osaki ,  Katsuo Abe ,  Shinji Narishige ,  Naoki Kodama ,  Kiwamu Tanahashi ,  Emi Mangyo

Inventor： Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Akira Ishikawa ,  Futoshi Tomiyama ,  Kazuetsu Yoshida ,  Tomoo Yamamoto ,  Yotsuo Yahisa ,  Akira Osaki ,  Katsuo Abe ,  Shinji Narishige ,  Naoki Kodama ,  Kiwamu Tanahashi ,  Emi Mangyo

IPC: G11B5/66

CPC classification number: G11B5/66 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24942 ,  Y10T428/265

Abstract: In a magnetic recording system including magnetic recording media, a rotation driving unit for driving these magnetic recording media, read/write magnetic heads, driving apparatus for driving these read/write magnetic heads, and a read/write signal processing apparatus, a reading portion of the respective magnetic heads is arranged by a magnetoresistive head. The magnetic recording media are constructed of multi-layered magnetic media having a plurality of magnetic layers fabricated directly, or via underlayers on a non-magnetic disk substrate, and of non-magnetic intermediate layers arranged among these non-magnetic layers. Furthermore, one coercivity which is measured by applying a magnetic field along a circumferential direction of the magnetic recording media, is selected to be larger than the other coercivity which is measured by applying a magnetic field along a radial direction of the magnetic recording media, so that a higher signal-to-noise ratio is achieved, as compared with that of the conventional magnetic recording system. Since the thickness of the non-magnetic intermediate layers is smaller than or equal to 5 nm, and also the total layer is smaller than or equal to 5 nm, and also the total layer number of the plural magnetic layers is selected to be odd, better characteristics can be achieved. Accordingly, since the MTBF (Mean Time Before Failure) is longer than or equal to 0.15 million hours with high recording density, and the disk substrate and the magnetic head sliders can be mounted at high packaging density, a compact and high-capacity magnetic recording system can be obtained.

Abstract translation: 在包括磁记录介质的磁记录系统中，用于驱动这些磁记录介质的旋转驱动单元，读/写磁头，用于驱动这些读/写磁头的驱动装置以及读/写信号处理装置，读/ 相应的磁头由磁阻头安排。 磁记录介质由具有直接制造的多个磁性层或通过非磁盘基板上的底层以及布置在这些非磁性层之间的非磁性中间层的多层磁性介质构成。 此外，通过沿着磁记录介质的圆周方向施加磁场来测量的一个矫顽力被选择为大于通过沿着磁记录介质的径向方向施加磁场而测量的其他矫顽力，因此， 与常规磁记录系统相比，实现了更高的信噪比。 由于非磁性中间层的厚度小于或等于5nm，并且总层小于或等于5nm，并且多个磁性层的总层数也被选择为奇数， 可以实现更好的特性。 因此，由于MTBF（平均故障间隔时间）长于或等于0.15万小时，具有高记录密度，并且盘基板和磁头滑块可以以高封装密度安装，紧凑且高容量的磁记录 系统可以得到。

公开(公告)号：US06985321B2

公开(公告)日：2006-01-10

申请号：US10795328

申请日：2004-03-09

Applicant: Akira Osaki

Inventor： Akira Osaki

IPC: G11B5/02

CPC classification number: G11B5/4853 ,  G11B5/012 ,  G11B5/486 ,  G11B2005/0013

Abstract: A head suspension assembly having a magnetic head, an arm which is supported so as to rotate, a suspension having one end which is fixed to an end of the arm and an other end which mounts the magnetic head, a nonvolatile memory which is mounted on the suspension assembly, and stores control parameters of the magnetic head, a connecting terminal which is mounted to the arm, and a signal transmission line which electrically connects the connecting terminal to the nonvolatile memory and the magnetic head. The connecting terminal enables transmission of signals at least one of to and from the head suspension assembly, the nonvolatile memory and the magnetic head.

Abstract translation: 一种头悬挂组件，其具有磁头，支撑为旋转的臂，具有固定到臂的端部的一端和安装磁头的另一端的悬架，安装在磁头上的非易失性存储器 悬架组件，并且存储磁头的控制参数，安装到臂的连接端子和将连接端子电连接到非易失性存储器和磁头的信号传输线。 连接端子使得能够传输来自头悬架组件，非易失性存储器和磁头的至少一个信号。

公开(公告)号：US06707628B2

公开(公告)日：2004-03-16

申请号：US09785283

申请日：2001-02-20

Applicant: Akira Osaki

Inventor： Akira Osaki

IPC: G11B502

CPC classification number: G11B5/4853 ,  G11B5/012 ,  G11B5/486 ,  G11B2005/0013

Abstract: A head suspension assembly 4 has an arm 17 supported so as to rotate, an elastically flexible suspension 16 having one end which is fixed to an end of the arm and the other end has a magnetic head 2 mounted thereon, and a signal transmission line 18 fixed on the suspension and the arm which connects the magnetic head with a main FPC. A head amplifier 8, which transmits and receives signals to and from the magnetic head, and a nonvolatile memory 9, which stores optimized control parameters of the magnetic head and the head amplifier, are mounted together on the head suspension assembly; and, the head amplifier and the nonvolatile memory are electrically connected to the signal transmission

Abstract translation: 头悬挂组件4具有被支撑为旋转的臂17，弹性柔性悬架16具有一端固定到臂的一端，另一端具有安装在其上的磁头2，信号传输线18 固定在悬架上和将磁头与主FPC连接的臂。 向磁头发送信号和从磁头接收信号的头放大器8和存储磁头和头放大器的优化控制参数的非易失性存储器9一起安装在磁头悬架组件上; 并且，头放大器和非易失性存储器电连接到信号传输

公开(公告)号：US5815343A

公开(公告)日：1998-09-29

申请号：US967346

申请日：1997-10-27

Applicant: Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

Inventor： Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

IPC: G11B5/012 ,  G11B5/39 ,  G11B5/62 ,  G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84 ,  G11B5/78 ,  G11B5/82 ,  G11B17/00

CPC classification number: G11B5/012 ,  G11B5/39 ,  G11B5/64 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7315 ,  G11B5/7325 ,  G11B5/8404

Abstract: A magnetic recording medium includes a non-magnetic substrate, and a magnetic layer provided on the non-magnetic substrate. The value of the product Br.sub.1 .delta. of the residual flux density Br.sub.1 of the magnetic layer determined in a recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 180 G.mu.m; the value of the ratio of Br.sub.1 to the residual flux density Br.sub.2 determined in a direction parallel to the substrate plane and perpendicular to the recording direction, Br.sub.1 /Br.sub.2, is not less than 1.3 and not more than 3; the surface of the non-magnetic substrate has texture grooves therein extending predominantly in the recording direction; and the average roughness factor Ra of the surface of the magnetic layer determined in a direction perpendicular to the substrate plane and perpendicular to the recording direction is not less than 0.3 nm and not more than 1.9 nm. Alternatively, the value of the product Br.delta. of the residual flux density Br of the magnetic layer determined in the recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 80 G.mu.m; and the value of the anisotropic magnetic field H.sub.k of the magnetic recording medium is not less than 7 kOe and not more than 20 kOe.

Abstract translation: 磁记录介质包括非磁性衬底和设置在非磁性衬底上的磁性层。 在记录方向上确定的磁性层的剩余磁通密度Br1和磁性层的厚度δ的乘积Br1δ的值不小于5Gm且不大于180Gm; 在平行于基板平面并垂直于记录方向Br1 / Br2的方向上确定的Br1与剩余通量密度Br2的比值不小于1.3且不大于3; 非磁性基板的表面具有主要在记录方向上延伸的织构槽; 并且在垂直于基板平面并垂直于记录方向的方向上确定的磁性层的表面的平均粗糙度Ra不小于0.3nm且不大于1.9nm。 或者，在记录方向上确定的磁性层的剩余磁通密度Br和磁性层的厚度δ的乘积Br delta的值不小于5Gm且不大于80Gm; 并且磁记录介质的各向异性磁场Hk的值不小于7kOe且不大于20kOe。

公开(公告)号：US4985295A

公开(公告)日：1991-01-15

申请号：US141423

申请日：1988-01-07

Applicant: Heigo Ishihara ,  Akira Osaki ,  Waichi Nagashiro ,  Fuzio Maeda

Inventor： Heigo Ishihara ,  Akira Osaki ,  Waichi Nagashiro ,  Fuzio Maeda

IPC: C09D5/23 ,  G11B5/714 ,  G11B5/725

CPC classification number: G11B5/714 ,  G11B5/725 ,  Y10S428/90 ,  Y10T428/2495 ,  Y10T428/249981

Abstract: A magnetic recording medium comprising a substrate and, formed thereon, a magnetic layer comprised of magnetic particles bonded to each other with a thermosetting binder can be improved with respect to the durability by forming a number of fine pores in the magnetic layer and impregnating the fine pores with a lubricant. Particularly, when the fine pores have a diameter of 0.2 .mu.m or less and a rate of the fine pore in area of 3 to 30%, the durability can be improved while maintaining the noise during the recording and reproduction of information on a low level. In preparing the magnetic recording medium having such fine pores, it is preferred that an easily thermal-decomposable additive, such as polyalkylene oxide, be added to a magnetic layer forming paint.A magnetic recording medium having further improved characteristics can be produced by interposing an undercoating layer having a number of fine pores between the magnetic layer and the substrate, allowing the fine pores in the undercoating layer to communicate with the fine pores with a lubricant. In this case, in forming the fine pores, it is preferable to add an easily thermal-decomposable additive to a paint or extract a thermoplastic resin from a layer containing the thermoplastic resin with a solvent.

Abstract translation: 通过在磁性层中形成许多细孔并浸渍精细的方法，可以提高包含基材和形成在其上的由磁性颗粒彼此结合的由热固性粘合剂组成的磁性层的磁性记录介质。 有润滑剂的孔。 特别是，当细孔的直径为0.2μm以下，细孔的面积率为3〜30％时，可以提高耐久性，同时保持记录期间的噪音和低信息的再生 。 在制备具有这种细孔的磁记录介质时，优选将易分解性的添加剂，例如聚环氧烷，加到磁性层形成涂料中。 具有进一步改善的特性的磁记录介质可以通过在磁性层和衬底之间插入具有许多细孔的底涂层，使底涂层中的细孔与润滑剂与细孔连通来产生。 在这种情况下，在形成细孔时，优选在涂料中添加容易热分解的添加剂，或者由含有热塑性树脂的层用溶剂提取热塑性树脂。

公开(公告)号：US4966797A

公开(公告)日：1990-10-30

申请号：US455241

申请日：1989-12-22

Applicant: Heigo Ishihara ,  Akira Osaki ,  Takanori Kudo

Inventor： Heigo Ishihara ,  Akira Osaki ,  Takanori Kudo

IPC: G11B5/702 ,  G11B5/84

CPC classification number: G11B5/84 ,  G11B5/7027 ,  G11B5/7028 ,  Y10S428/90 ,  Y10T428/249958 ,  Y10T428/249979 ,  Y10T428/24998 ,  Y10T428/249981 ,  Y10T428/249995 ,  Y10T428/269

Abstract: A magnetic recording medium is prepared by applying a magnetic paint containing at least magnetic particles and a thermally curable binder to a substrate, thermally curing the applied magnetic paint, thereby forming a magnetic film, and impregnating micropores formed in the magnetic film with a lubricant, where the magnetic paint further contains a poly(alkyleneoxide)-grafted binder, and the grafted poly(alkyleneoxide) moiety is thermally decomposed during the thermal curing, thereby forming the micropores in the magnetic film. A large number of micropores having a pore size of not more than 0.1 .mu.m are formed in the magnetic film, and a magnetic disk of high durability with less noises and errors during the recording and reproduction can be obtained.

Abstract translation: 通过将至少含有磁性颗粒和可热固化的粘合剂的磁性涂料涂覆在基材上，热固化涂覆的磁性涂料，从而形成磁性膜，并用润滑剂浸渍在磁性膜中形成的微孔，从而制备磁记录介质， 其中磁性涂料还含有聚（环氧烷）移植的粘合剂，并且接枝的聚（环氧烷）部分在热固化期间被热分解，从而在磁性膜中形成微孔。 在磁性膜中形成孔径不大于0.1μm的大量微孔，并且可以获得在记录和再现期间具有较小噪声和误差的高耐用性的磁盘。

公开(公告)号：US6057021A

公开(公告)日：2000-05-02

申请号：US944472

申请日：1997-10-06

Applicant: Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

Inventor： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

IPC: G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84 ,  G11B5/60

CPC classification number: G11B5/7325 ,  G11B5/64 ,  G11B5/66 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/265

Abstract: In a magnetic recording medium having a non-magnetic disk substrate and a magnetic film formed on the surface of the non-magnetic disk substrate, a surface average roughness factor Ra(r) on the surface of the medium being from 0.3 nm to 3 nm, an orientation ratio of coercivity being from 0.1 to 0.7, and an in-plane magnetic anisotropic energy being from 3.times.10.sup.4 J/m.sup.3 to 5.times.10.sup.5 J/m.sup.3. By using such a medium, it is possible to provide a magnetic recording apparatus in which the magnetic head is capable of flying in a low position and high-density recording is achieved.

Abstract translation: 在具有非磁盘基板和形成在非磁盘基板的表面上的磁性膜的磁记录介质中，介质表面的表面平均粗糙度Ra（r）为0.3nm〜3nm 矫顽力的取向比为0.1〜0.7，面内磁各向异性能为3×104J / m3〜5×105J / m3。 通过使用这种介质，可以提供磁头能够在低位置飞行的磁记录装置，并且实现高密度记录。

公开(公告)号：US5750230A

公开(公告)日：1998-05-12

申请号：US155515

申请日：1993-11-22

Applicant: Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

Inventor： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

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

CPC classification number: G11B5/7325 ,  G11B5/64 ,  G11B5/66 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/265

Abstract: In a magnetic recording medium having a nonmagnetic disk substrate and a magnetic film formed on the surface of the non-magnetic disk substrate, a surface average roughness factor Ra(r) on the surface of the medium being from 0.3 nm to 3 nm, an orientation ratio of coercivity being from 0.1 to 0.7, and an in-plane magnetic anisotropic energy being from 3.times.10.sup.4 J/m.sup.3 to 5.times.10.sup.5 J/m.sup.3. By using such a medium, it is possible to provide a magnetic recording apparatus in which the magnetic head is capable of flying in a low position and high-density recording is achieved.

Abstract translation: 在具有非磁性盘基片和形成在非磁盘基片的表面上的磁性膜的磁记录介质中，介质表面的表面平均粗糙系数Ra（r）为0.3nm至3nm， 矫顽力取向比为0.1〜0.7，面内磁各向异性能为3×104J / m3〜5×105J / m3。 通过使用这种介质，可以提供磁头能够在低位置飞行的磁记录装置，并且实现高密度记录。