公开(公告)号：US20050128618A1

公开(公告)日：2005-06-16

申请号：US11041228

申请日：2005-01-25

申请人： Hiroshi Ikekame ,  Takeo Yamashita

发明人： Hiroshi Ikekame ,  Takeo Yamashita

IPC分类号： G11B5/09 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B20/10

CPC分类号： G11B5/012 ,  G11B5/02 ,  G11B20/10009 ,  G11B2005/0013

摘要： Devices and methods for generating a magnetic head-specific overshoot current which is combined with an alternating current waveform into a write current used by the magnetic head to store information on a magnetic medium. A processor analyzes the frequency of incoming write data and retrieves from a data table of an overshoot current amplitude and an overshoot current phase. This amplitude and phase information is sent to an overshoot current generator to generate an overshoot current that is responsive to the dynamic impedance properties of a magnetic write head during operation. The data table may have information related to one or many write heads, and the data table may be further subdivided based on additional dynamic characteristics of a write head that may affect the impedance thereof.

公开(公告)号：US20050063097A1

公开(公告)日：2005-03-24

申请号：US10961035

申请日：2004-10-12

申请人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

发明人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

IPC分类号： G11B5/60 ,  G11B5/48

CPC分类号： G11B5/486 ,  G11B5/484

摘要： Magnetic disk apparatus includes an electric wiring capable of satisfying an electric condition under which high frequency recording higher than or equal to 200 MHz, a magnetic head having at least a recording device to a magnetic recording medium, and also the electric wiring corresponding to a recording current supplying device to this magnetic head are formed on a suspension member for mechanically suspending the magnetic head, the recording current being supplied to a magnetic head recording device by employing such electric wiring, the characteristic impedance of which is higher than a maximum impedance of the magnetic head recording device.

摘要翻译： 磁盘装置包括能够满足高于或等于200MHz的高频记录的电气条件的电线，至少具有至磁记录介质的记录装置的磁头以及对应于记录的电线 该磁头的电流供给装置形成在用于机械地悬挂磁头的悬挂构件上，记录电流通过采用这种电线被提供给磁头记录装置，其特性阻抗高于该磁头的最大阻抗 磁头记录装置。

公开(公告)号：US20050007093A1

公开(公告)日：2005-01-13

申请号：US10911615

申请日：2004-08-05

申请人： Hiroshi Ikekame

发明人： Hiroshi Ikekame

IPC分类号： G01R15/24 ,  G01R19/00 ,  G01N27/416

CPC分类号： G01R15/243

摘要： A current measurement method for measuring a current that flows in a transmission line of an electric circuit including steps of installing a magnetooptical device in a magnetic field which is generated based upon current that flows in the transmission line, making a polarized light on the magnetooptical device, and acquiring a current based upon the variation of the polarization of reflected light from the magnetooptical device on which the polarized light is incident.

摘要翻译： 一种用于测量在电路的传输线中流动的电流的电流测量方法，包括以下步骤：在基于在传输线中流动的电流产生的磁场中安装磁光器件，使得偏振光在磁光设备上 并且基于来自偏振光入射的磁光装置的反射光的偏振的变化来获取电流。

公开(公告)号：US06661613B2

公开(公告)日：2003-12-09

申请号：US10318114

申请日：2002-12-13

申请人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

发明人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

IPC分类号： G11B555

CPC分类号： G11B5/486 ,  G11B5/484

摘要： Magnetic disk apparatus includes an electric wiring capable of satisfying an electric condition under which high frequency recording higher than or equal to 200 MHz, a magnetic head having at least a recording device to a magnetic recording medium, and also the electric wiring corresponding to a recording current supplying device to this magnetic head are formed on a suspension member for mechanically suspending the magnetic head, the recording current being supplied to a magnetic head recording device by employing such electric wiring, the characteristic impedance of which is higher than a maximum impedance of the magnetic head recording device.

公开(公告)号：US20060093863A1

公开(公告)日：2006-05-04

申请号：US11200001

申请日：2005-08-10

申请人： Yuko Tsuchiya ,  Masafumi Mochizuki ,  Teruo Kohashi ,  Hiroshi Ikekame

发明人： Yuko Tsuchiya ,  Masafumi Mochizuki ,  Teruo Kohashi ,  Hiroshi Ikekame

IPC分类号： G11B5/66

CPC分类号： G11B5/855 ,  G11B5/667 ,  G11B5/7325 ,  G11B5/8404

摘要： A discrete track type perpendicular magnetic recording medium and a manufacturing method thereof are provided where the crystallographic orientation and perpendicular magnetic anisotropy of the magnetic recording layer are excellent, the magnetic properties of the magnetic recording layer are not deteriorated by processing, the manufacturing cost is not expensive, and a complicated manufacturing process is not required. A concavo-convex pattern structure consisting of a convex part corresponding to the position of the data track recording magnetic information and a concave part corresponding to the position of the space between data tracks is provided, and the base layer for controlling crystallographic orientation and the magnetic recording layer are stacked without voids on the concave and convex parts along the concavo-convex pattern structure.

摘要翻译： 提供了一种离散轨道型垂直磁记录介质及其制造方法，其中磁记录层的结晶取向和垂直磁各向异性优异，磁记录层的磁特性不会因加工而劣化，制造成本不 昂贵，并且不需要复杂的制造过程。 提供了由对应于数据磁道记录磁信息的位置的凸部和与数据磁道之间的空间的位置相对应的凹部组成的凹凸图案结构，并且用于控制晶体取向的基层和磁 记录层沿着凹凸图案结构在凹凸部上堆叠而没有空隙。

公开(公告)号：US06833694B2

公开(公告)日：2004-12-21

申请号：US10603627

申请日：2003-06-26

申请人： Hiroshi Ikekame

发明人： Hiroshi Ikekame

IPC分类号： G01R3100

CPC分类号： G01R15/243

摘要： The object of the invention is to provide technique and an apparatus for precisely measuring high frequency current that flows in a transmission line of a small impedance load circuit. A current waveform can be measured in wide bandwidth (at high-time resolution) and at high sensitivity without processing DUT (nondestructive) and without having an effect of the impedance of the apparatus (noninvasive) by installing a magnetooptical device in a magnetic field generated based upon current that flows in the transmission line, applying a bias magnetic field to the magnetooptical device by a magnetic field generator, making polarized light incident under the control of a position so that detection sensitivity is maximum and detecting the variation of polarization included in reflected light from the magnetooptical device.

摘要翻译： 本发明的目的是提供用于精确测量在小阻抗负载电路的传输线中流动的高频电流的技术和装置。 可以在宽带宽（高分辨率）和高灵敏度下测量电流波形，无需处理DUT（非破坏性），并且通过在产生的磁场中安装磁光器件而不影响设备（无创）的阻抗。 基于在传输线路中流动的电流，通过磁场发生器向磁光装置施加偏置磁场，使得在位置控制下入射的偏振光使得检测灵敏度最大并检测反射的包括的偏振变化 来自磁光装置的光。

公开(公告)号：US06529348B2

公开(公告)日：2003-03-04

申请号：US10126576

申请日：2002-04-22

申请人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

发明人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

IPC分类号： G11B555

CPC分类号： G11B5/486 ,  G11B5/484

摘要： The magnetic disk apparatus includes an electric wiring capable of satisfying an electric condition under which high frequency recording higher than or equal to 200 MHz can be accomplished. A magnetic head having at least a recording device for recording to a magnetic recording medium is provided as well as an electric wiring corresponding to a recording current supplying device for this magnetic head are formed on a suspension member for mechanically suspending the magnetic head. The recording current is supplied to a magnetic head recording device by employing such electric wiring, the characteristic impedance of which is higher than a maximum impedance of the magnetic head recording device.

摘要翻译： 磁盘装置包括能够满足可以实现高于或等于200MHz的高频记录的电气条件的电线。 具有至少一个用于记录到磁记录介质的记录装置的磁头被提供，并且与用于该磁头的记录电流供应装置对应的电线形成在用于机械地悬挂磁头的悬挂构件上。 通过使用其特性阻抗高于磁头记录装置的最大阻抗的这种电线将记录电流提供给磁头记录装置。

公开(公告)号：US08482877B2

公开(公告)日：2013-07-09

申请号：US12079474

申请日：2008-03-26

申请人： Kyo Akagi ,  Hiroshi Ikekame

发明人： Kyo Akagi ,  Hiroshi Ikekame

IPC分类号： G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59633

摘要： Embodiments of the present invention provide a servo write medium, method and device for writing servo information by self servo write on the servo region formed from a flat section of the discrete track medium. The recording or write device yields the same servo characteristics as magnetic servo writing, is superior to pre-patterned servo, and delivers a greater write storage capacity with an even higher recording density. According to one embodiment, a self servo write method is used to write servo information on a flat section formed on a patterned disk on which discrete tracks are formed. Timing detection patterns (grooves) required for controlling the timing along the periphery during self servo write are formed by pre-patterning on the disk, and RRO error signals used for positioning control along the radius are written in the servo information on a flat section of the disk.

摘要翻译： 本发明的实施例提供一种伺服写入介质，用于通过自伺服写入在由离散轨道介质的平坦部分形成的伺服区域上写入伺服信息的方法和装置。 记录或写入设备产生与伺服写入相同的伺服特性，优于预先构图的伺服，并以更高的记录密度提供更大的写入存储容量。 根据一个实施例，使用自伺服写入方法将伺服信息写入形成在其上形成有分立轨道的图案化盘上的平坦部分上。 在自伺服写入期间通过预图案化形成用于在自伺服写入期间控制沿周边的定时所需的定时检测模式（凹槽），并且用于沿半径的定位控制的RRO误差信号被写入伺服信息 磁盘。

公开(公告)号：US20080239906A1

公开(公告)日：2008-10-02

申请号：US12079474

申请日：2008-03-26

申请人： Kyo Akagi ,  Hiroshi Ikekame

发明人： Kyo Akagi ,  Hiroshi Ikekame

IPC分类号： G11B5/58

CPC分类号： G11B5/59688 ,  G11B5/59633

摘要： Embodiments of the present invention provide a servo write medium, method and device for writing servo information by self servo write on the servo region formed from a flat section of the discrete track medium. The recording or write device yields the same servo characteristics as magnetic servo writing, is superior to pre-patterned servo, and delivers a greater write storage capacity with an even higher recording density. According to one embodiment, a self servo write method is used to write servo information on a flat section formed on a patterned disk on which discrete tracks are formed. Timing detection patterns (grooves) required for controlling the timing along the periphery during self servo write are formed by pre-patterning on the disk, and RRO error signals used for positioning control along the radius are written in the servo information on a flat section of the disk.

摘要翻译： 本发明的实施例提供一种伺服写入介质，用于通过自伺服写入在由离散轨道介质的平坦部分形成的伺服区域上写入伺服信息的方法和装置。 记录或写入设备产生与伺服写入相同的伺服特性，优于预先构图的伺服，并以更高的记录密度提供更大的写入存储容量。 根据一个实施例，使用自伺服写入方法将伺服信息写入形成在其上形成有分立轨道的图案化盘上的平坦部分上。 在自伺服写入期间通过预图案化形成用于在自伺服写入期间控制沿周边的定时所需的定时检测模式（凹槽），并且用于沿半径的定位控制的RRO误差信号被写入伺服信息 磁盘。

公开(公告)号：US20080049359A1

公开(公告)日：2008-02-28

申请号：US11780521

申请日：2007-07-20

申请人： RYUJI TSUCHIYAMA ,  Masahumi Mochizuki ,  Kyosuke Ono ,  Yuko Tsuchiya ,  Hiroshi Ikekame

发明人： RYUJI TSUCHIYAMA ,  Masahumi Mochizuki ,  Kyosuke Ono ,  Yuko Tsuchiya ,  Hiroshi Ikekame

IPC分类号： G11B5/82

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/855

摘要： In a discrete track medium and a patterned medium, a meniscus adsorptive force is reduced and writing into adjacent tracks is prevented. A magnetic layer in lands or patterns in the discrete track medium or the patterned medium is formed into a cylindrical shelly or spherical shelly shape with a uniform thickness. Moreover, a height of cylindrical shelly land or a height of spherical shelly land is changed between 5 nm and 30 nm according to radial positions. Thus, an effect is achieved for providing a magnetic recording medium and a magnetic disk apparatus which are excellent in realizing higher recording density and higher reliability.

摘要翻译： 在离散轨道介质和图案化介质中，弯月面吸附力减小，并且防止写入相邻轨迹。 在离散轨道介质或图案化介质中的平台或图案中的磁性层形成为具有均匀厚度的圆柱形的立体或球形形状。 此外，根据径向位置，在5nm至30nm之间改变圆柱形地面的高度或球形搁置高度的高度。 因此，实现了提供实现更高记录密度和更高可靠性的磁记录介质和磁盘装置的效果。