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公开(公告)号：US20130335856A1
公开(公告)日：2013-12-19
申请号：US13523657
申请日：2012-06-14
申请人： Hiroyasu Tanabe , Hideki Zaitsu , Kyo Akagi , Naoto Ito
发明人： Hiroyasu Tanabe , Hideki Zaitsu , Kyo Akagi , Naoto Ito
CPC分类号： G11B19/04 , G11B5/012 , G11B5/5565 , G11B5/59627 , G11B2005/0021
摘要： SMR disk drives are described that adjust track pitch or magnetic write width to compensate for external temperature effects. In one embodiment track pitch is increased when the media temperature increases. The temperature of magnetic media during write operations can be determined from the drives' temperature sensor. In other embodiments track pitch is adjusted based on the magnetic write width (MWW) which is determined from read-back testing of previously written data tracks. In an alternative embodiment, the width of the MWW is adjusted instead of the track pitch. The various factors that affect the MWW that can be used to increase or decrease the MWW, including write current characteristics and when available thermal-assistance parameters.
摘要翻译： 描述了SMR磁盘驱动器，其调节磁道间距或磁写入宽度以补偿外部温度效应。 在一个实施例中，当介质温度升高时，轨道间距增加。 写入操作期间磁介质的温度可以由驱动器的温度传感器确定。 在其他实施例中，基于从先前写入的数据轨道的回读测试确定的磁写入宽度（MWW）来调整轨道间距。 在替代实施例中，调整MWW的宽度而不是轨道间距。 影响MWW的各种因素可用于增加或减少MWW，包括写入电流特性和可用的热辅助参数。
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公开(公告)号：US08797672B2
公开(公告)日：2014-08-05
申请号：US13523657
申请日：2012-06-14
申请人： Hiroyasu Tanabe , Hideki Zaitsu , Kyo Akagi , Naoto Ito
发明人： Hiroyasu Tanabe , Hideki Zaitsu , Kyo Akagi , Naoto Ito
CPC分类号： G11B19/04 , G11B5/012 , G11B5/5565 , G11B5/59627 , G11B2005/0021
摘要： SMR disk drives are described that adjust track pitch or magnetic write width to compensate for external temperature effects. In one embodiment track pitch is increased when the media temperature increases. The temperature of magnetic media during write operations can be determined from the drives' temperature sensor. In other embodiments track pitch is adjusted based on the magnetic write width (MWW) which is determined from read-back testing of previously written data tracks. In an alternative embodiment, the width of the MWW is adjusted instead of the track pitch. The various factors that affect the MWW that can be used to increase or decrease the MWW, including write current characteristics and when available thermal-assistance parameters.
摘要翻译： 描述了SMR磁盘驱动器，其调节磁道间距或磁写入宽度以补偿外部温度效应。 在一个实施例中，当介质温度升高时，轨道间距增加。 写入操作期间磁介质的温度可以由驱动器的温度传感器确定。 在其他实施例中，基于从先前写入的数据轨道的回读测试确定的磁写入宽度（MWW）来调整轨道间距。 在替代实施例中，调整MWW的宽度而不是轨道间距。 影响MWW的各种因素可用于增加或减少MWW，包括写入电流特性和可用的热辅助参数。
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3.发明授权公开(公告)号：US08861116B2
公开(公告)日：2014-10-14
申请号：US13196022
申请日：2011-08-02
申请人： Mao Nishiyama , Masafumi Mochizuki , Kyo Akagi , Shuji Nishida , Kazunari Usui
发明人： Mao Nishiyama , Masafumi Mochizuki , Kyo Akagi , Shuji Nishida , Kazunari Usui
CPC分类号： G11B5/743 , G11B5/59627 , G11B5/59661
摘要： In one embodiment, a method includes spiral writing a DC pattern onto a magnetic disk medium using a writer of a magnetic head while moving the magnetic head in a direction about parallel to a radial direction of the magnetic disk medium while rotating the magnetic disk medium, reading the magnetic disk medium while moving the magnetic head in the direction about parallel to the radial direction of the magnetic disk medium while rotating the magnetic disk medium, and calculating a track pitch interval between data tracks of the magnetic disk medium based on the reading of the magnetic disk medium. In another embodiment, a magnetic disk medium includes a DC spiral pattern in a radial region further outward and/or a radial region further inward than a radial region where data is recorded.
摘要翻译： 在一个实施例中，一种方法包括使用磁头的写入器将DC图案螺旋写入到磁盘介质上，同时在旋转磁盘介质的同时在大致平行于磁盘介质的径向的方向上移动磁头， 在旋转磁盘介质的同时沿着与磁盘介质的径向大致平行的方向移动磁头的同时读取磁盘介质，并且基于读取磁盘介质计算磁盘介质的数据磁道之间的磁道间距间隔 磁盘介质。 在另一个实施例中，磁盘介质包括在径向区域中进一步向内和/或径向区域的直流螺旋图案，该径向区域比记录数据的径向区域更内侧。
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公开(公告)号：US07116508B2
公开(公告)日：2006-10-03
申请号：US11044298
申请日：2005-01-28
申请人： Kyo Akagi , Takashi Yamaguchi , Koki Uefune , Motoyasu Tsunoda , Atsushi Saito
发明人： Kyo Akagi , Takashi Yamaguchi , Koki Uefune , Motoyasu Tsunoda , Atsushi Saito
CPC分类号： G11B5/012 , G11B17/0402 , G11B17/0407 , G11B19/04 , G11B2005/001
摘要： A magnetic disk apparatus has: a magnetic disk having a magnetic film formed on a substrate; a spindle motor for rotating the magnetic disk; a magnetic head for writing/reading information on/from the magnetic disk; a supporting member for supporting the magnetic head; a driving mechanism for moving the magnetic head to a predetermined position on the magnetic disk; a magnetic writing/reading circuit for enabling the magnetic head to write/read information on/from the magnetic disk; an interface for sending/receiving signals for controlling the information to/from another information processing device, a device for detecting whether or not the magnetic disk apparatus is in operation; and mechanism for latching movable part of the magnetic disk apparatus on the basis of detection result of the detecting device.
摘要翻译： 磁盘装置具有：在基板上形成有磁性膜的磁盘; 用于旋转磁盘的主轴电机; 用于在/从磁盘读/写信息的磁头; 用于支撑磁头的支撑构件; 用于将磁头移动到磁盘上的预定位置的驱动机构; 用于使磁头能够从/从磁盘写入/读取信息的磁性写入/读取电路; 用于发送/接收用于将信息控制到另一个信息处理装置的信号的接口，用于检测磁盘装置是否正在运行的装置; 以及基于检测装置的检测结果来锁定磁盘装置的可动部的机构。
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5.发明授权Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect 失效具有垂直记录介质和头部的磁性装置具有使用隧道效应的多层再现元件公开(公告)号：US07054120B2
公开(公告)日：2006-05-30
申请号：US10700500
申请日：2003-11-05
申请人： Ryoichi Nakatani , Masahiro Kitada , Naoki Koyama , Isamu Yuito , Hisashi Takano , Eijin Moriwaki , Mikio Suzuki , Masaaki Futamoto , Fumio Kugiya , Yoshibumi Matsuda , Kazuo Shiiki , Yoshinori Miyamura , Kyo Akagi , Takeshi Nakao , Hirotsugu Fukuoka , Takayuki Munemoto , Tokuho Takagaki , Toshio Kobayashi , Hideo Tanabe , Noboru Shimizu
发明人： Ryoichi Nakatani , Masahiro Kitada , Naoki Koyama , Isamu Yuito , Hisashi Takano , Eijin Moriwaki , Mikio Suzuki , Masaaki Futamoto , Fumio Kugiya , Yoshibumi Matsuda , Kazuo Shiiki , Yoshinori Miyamura , Kyo Akagi , Takeshi Nakao , Hirotsugu Fukuoka , Takayuki Munemoto , Tokuho Takagaki , Toshio Kobayashi , Hideo Tanabe , Noboru Shimizu
IPC分类号： G11B5/39
CPC分类号： G11B5/398 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3903 , G11B5/3909 , G11B5/3929 , G11B5/3967 , G11B2005/0002 , G11B2005/0016 , G11B2005/3996 , H01F10/324 , H01F10/3254 , H01F10/3268 , H01L43/08 , Y10T29/49032 , Y10T29/49043 , Y10T29/49044 , Y10T29/49155
摘要： The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semiconductor or an antiferromagnetic material against the magnetic layers, and the magnetoresistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that a current flows in the intermediate layer. The film surfaces of all the magnetic layers constituting the magnetoresistance effect element are opposed substantially at right angles to the recording surface of a magnetic recording medium. Therefore, the area of the magnetic layers facing the recording surface of the magnetic recording medium can be extremely reduced, and thus the magnetic field from a very narrow region of the high-density recorded magnetic recording medium can be detected by the current which has a tunneling characteristic and passes through the intermediate layer.
摘要翻译： 磁阻效应元件是至少具有磁性层和抵抗磁性层的绝缘材料，半导体或反铁磁材料的中间层的多层结构，并且磁阻效应元件至少在相对的磁性层上形成端子， 使得电流在中间层中流动。 构成磁阻效应元件的所有磁性层的膜表面基本上与磁记录介质的记录表面成直角相对。 因此，能够极大地降低与磁记录介质的记录面对置的磁性层的面积，因此能够通过电流检测来自高密度记录磁记录介质的非常窄的区域的磁场 穿透特性，穿过中间层。
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公开(公告)号：US06987635B2
公开(公告)日：2006-01-17
申请号：US10383056
申请日：2003-03-07
申请人： Kyo Akagi , Kouki Uefune , Naoki Satoh , Terumi Takashi , Atsushi Saito
发明人： Kyo Akagi , Kouki Uefune , Naoki Satoh , Terumi Takashi , Atsushi Saito
IPC分类号： G11B15/18
摘要： In a magnetic disk apparatus which is removably mounted or embedded to a host apparatus and intermittently accessed for recording/reproducing data, a RAM contained in the host apparatus is utilized for a portion or entirety of a buffer RAM for use in the intermittent access to accomplish a reduction in size and cost of the magnetic disk apparatus. In addition, the magnetic disk apparatus is controlled to rotate a magnetic disk at a variable rotational speed, and operated at a rotational speed at which the total power consumption is minimized in accordance with the capacity of the utilized buffer RAM and whether an access is made for recording or reproduction, thereby improving a power saving effect.
摘要翻译： 在可移动地安装或嵌入到主机设备中并间歇地访问用于记录/再现数据的磁盘装置中，包含在主机装置中的RAM用于间歇访问中使用的缓冲RAM的一部分或全部以完成 磁盘装置的尺寸和成本的减小。 此外，磁盘装置被控制成以可变转速旋转磁盘，并且以根据所使用的缓冲RAM的容量的总功耗最小化的转速进行操作，以及是否进行访问 用于记录或再现，从而提高节电效果。
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7.发明授权Magnetic disk drive with servo signal decoder using amplitude detection and phase detection system 失效磁盘驱动器采用伺服信号解码器，采用振幅检测和相位检测系统公开(公告)号：US06590729B1
公开(公告)日：2003-07-08
申请号：US09680470
申请日：2000-10-06
申请人： Kyo Akagi , Yosuke Seo
发明人： Kyo Akagi , Yosuke Seo
IPC分类号： G11B509
CPC分类号： B82Y10/00 , G11B5/59633 , G11B5/743
摘要： Disclosed are a method and a device that exhibit better performance against factors inhibiting an increase in track density than the current system. A servo pattern is constituted of a plurality of patterns arranged on both sides of the center lines of tracks, the patterns on one side of the center line being shifted in the track direction from the patterns on the other side along the center line, and patterns A and B are each constituted of two types of phase patterns arranged in the track-width direction, which are patterns 11 and 12 and patterns 13 and 14, respectively. The positional signal of a magnetic head is decoded by determining a sinusoidal function, which roughly agrees with the waveform of the reproduced signal of the servo pattern, based on the information on the frequency of the reproduced signal which has been stored in advance.
摘要翻译： 公开了一种方法和装置，其对于阻止比当前系统增加的轨道密度的因素具有更好的性能。 伺服图案由布置在轨道的中心线的两侧的多个图案构成，中心线一侧的图案沿着轨迹方向沿着中心线从另一侧的图案移位，并且图案 A和B分别由排列在轨道宽度方向上的两种类型的图案构成，分别是图案11和12以及图案13和14。 基于关于预先存储的再现信号的频率的信息，通过确定与伺服模式的再现信号的波形大致一致的正弦函数来解码磁头的位置信号。
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8.发明授权公开(公告)号：US06278593B1
公开(公告)日：2001-08-21
申请号：US09468309
申请日：1999-12-21
申请人： Ryoichi Nakatani , Masahiro Kitada , Naoki Koyama , Isamu Yuito , Hisashi Takano , Eijin Moriwaki , Mikio Suzuki , Masaaki Futamoto , Fumio Kugiya , Yoshibumi Matsuda , Kazuo Shiiki , Yoshinori Miyamura , Kyo Akagi , Takeshi Nakao , Hirotsugu Fukuoka , Takayuki Munemoto , Tokuho Takagaki , Toshio Kobayashi , Hideo Tanabe , Noboru Shimizu
发明人： Ryoichi Nakatani , Masahiro Kitada , Naoki Koyama , Isamu Yuito , Hisashi Takano , Eijin Moriwaki , Mikio Suzuki , Masaaki Futamoto , Fumio Kugiya , Yoshibumi Matsuda , Kazuo Shiiki , Yoshinori Miyamura , Kyo Akagi , Takeshi Nakao , Hirotsugu Fukuoka , Takayuki Munemoto , Tokuho Takagaki , Toshio Kobayashi , Hideo Tanabe , Noboru Shimizu
IPC分类号： G11B539
CPC分类号： G11B5/398 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3903 , G11B5/3909 , G11B5/3929 , G11B5/3967 , G11B2005/0002 , G11B2005/0016 , G11B2005/3996 , H01F10/324 , H01F10/3254 , H01F10/3268 , H01L43/08 , Y10T29/49032 , Y10T29/49043 , Y10T29/49044 , Y10T29/49155
摘要： The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semicondutor or an antiferromagnetic material against the magnetic layers, and the magneto-resistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that a current flows in the intermediate layer. The film surfaces of all the magnetic layers constituting the magnetoresistance effect element are opposed substantially at right angles to the recording surface of a magnetic recording medium. Therefore, the area of the magnetic layers facing the recording surface of the magnetic recording medium can be extremely reduced, and thus the magnetic field from a very narrow region of the high-density recorded magnetic recording medium can be detected by the current which has a tunneling characteristic and passes through the intermediate layer.
摘要翻译： 磁阻效应元件是至少具有磁性层和抵抗磁性层的绝缘材料，半导体或反铁磁材料的中间层的多层结构，并且磁阻效应元件具有至少形成在相对的磁体上的端子 层，使得电流在中间层中流动。 构成磁阻效应元件的所有磁性层的膜表面基本上与磁记录介质的记录表面成直角相对。 因此，能够极大地降低与磁记录介质的记录面对置的磁性层的面积，因此能够通过电流检测来自高密度记录磁记录介质的非常窄的区域的磁场 穿透特性，穿过中间层。
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公开(公告)号：US5557486A
公开(公告)日：1996-09-17
申请号：US160660
申请日：1993-12-02
申请人： Kyo Akagi , Yasuhiro Kato , Masaaki Matsumoto , Akira Iida , Yong-kweon Kim
发明人： Kyo Akagi , Yasuhiro Kato , Masaaki Matsumoto , Akira Iida , Yong-kweon Kim
CPC分类号： G11B19/2009 , G11B25/043 , G11B5/5521
摘要： A disk unit has a recording medium disk; a head for reading and writing information on said disk; a first actuator for moving said head relative to said disk, said first actuator having no bearing structure; a second actuator for rotating said disk, said second actuator having no bearing structure; and a housing for housing said disk, said head, said first actuator and said second actuator.
摘要翻译： 盘单元具有记录介质盘; 用于在所述盘上读取和写入信息的头部; 用于相对于所述盘移动所述头部的第一致动器，所述第一致动器不具有轴承结构; 用于旋转所述盘的第二致动器，所述第二致动器不具有轴承结构; 以及用于容纳所述盘，所述头，所述第一致动器和所述第二致动器的壳体。
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公开(公告)号：US07852595B2
公开(公告)日：2010-12-14
申请号：US12290361
申请日：2008-10-29
申请人： Hiroki Kitahori , Kyo Akagi , Takayuki Honda , Yasuo Kojima
发明人： Hiroki Kitahori , Kyo Akagi , Takayuki Honda , Yasuo Kojima
CPC分类号： G11B25/043 , G11B33/148 , G11B33/1486
摘要： Embodiments of the present invention relate to a method for manufacturing a magnetic disk unit, the method including a step of writing servo data into the magnetic disk while introducing a low-density gas having a lower density than air into the enclosure. In one embodiment, the magnetic disk unit is comprised of a magnetic disk, a magnetic head, and a voice coil motor which are accommodated in the hermetically sealed enclosure. The enclosure has a gas inlet and a gas outlet, which are provided respectively with filters attached thereto.
摘要翻译： 本发明的实施例涉及一种用于制造磁盘单元的方法，该方法包括将伺服数据写入磁盘同时将具有比空气密度低的密度的低密度气体引入外壳的步骤。 在一个实施例中，磁盘单元包括容纳在密封外壳中的磁盘，磁头和音圈电机。 外壳具有气体入口和气体出口，分别设有连接到其上的过滤器。
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