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1. 发明授权

US06657804B1 Magnetic recording disk drive 有权
标题翻译：磁记录磁盘驱动器
公开(公告)号：US06657804B1
公开(公告)日：2003-12-02
申请号：US09451912
申请日：1999-12-01
申请人： Futoshi Tomiyama , Takehiko Hamaguchi , Toru Matsushita , Hideki Zaitsu , Reijiro Tsuchiya , Hisashi Takano
发明人： Futoshi Tomiyama , Takehiko Hamaguchi , Toru Matsushita , Hideki Zaitsu , Reijiro Tsuchiya , Hisashi Takano
IPC分类号： G11B1504
CPC分类号： G11B5/5526 , G11B5/59633
摘要： A magnetic recording disk drive can prevent the deterioration of the head off-track characteristics and the reduction of the drive performance even when an erase band asymmetry resulting from a skew angle exists. A write inhibit slice value for an inner peripheral side offset is made smaller than a write inhibit slice value for an outer peripheral side offset at a position where an erase band on the inner peripheral side is greater than an erase band on the outer peripheral side, so that the adjacent track on the outer peripheral side cannot easily erase a data track. On the contrary, the inner periphery and the outer periphery are paraphrased at a position where the erase band on the outer peripheral side is greater than the erase band on the inner peripheral side.
摘要翻译：磁记录盘驱动器即使当存在由倾斜角度导致的擦除带不对称性时，也可以防止磁头偏离磁道特性的恶化和驱动性能的降低。使内周侧偏移的写禁止限幅值小于在内周侧的擦除频带大于外周侧的擦除频带的位置处的外周侧偏移的写禁止限幅值，使得外周侧的相邻轨道不能容易地擦除数据轨道。相反，内周侧和外周侧在外周侧的擦除带大于内周侧的擦除带的位置被释义。

2. 发明授权

US06404576B1 Method and system for compensation of nonlinearity or fluctuation of head-position signal 失效
标题翻译：补偿非线性或头位信号波动的方法和系统
公开(公告)号：US06404576B1
公开(公告)日：2002-06-11
申请号：US09481399
申请日：2000-01-12
申请人： Takehiko Hamaguchi , Futoshi Tomiyama , Hideki Zaitsu , Hisashi Takano
发明人： Takehiko Hamaguchi , Futoshi Tomiyama , Hideki Zaitsu , Hisashi Takano
IPC分类号： G11B509
CPC分类号： B82Y10/00 , B82Y25/00 , G11B5/012 , G11B5/3909 , G11B5/5552 , G11B5/59611 , G11B2005/001 , G11B2005/0016
摘要： A plurality of patterns are formed so that each is deviated slightly from another in each sector in the track width direction. Then, the pattern is followed up, thereby obtaining both a full-track profile and a micro-track profile. A variation of a position signal is detected from this profile, thereby creating a table for correcting the non-linearity error of the position signal. Consequently, the distribution of the write/read-back property is measured, thereby enabling the track density to be improved. Furthermore, a variation of the position signal caused by a property variation of the head read-back element is detected and corrected, thereby enabling a high reliability and a high track density to be realized for the object magnetic recording disk apparatus.
摘要翻译：形成多个图案，使得每个图案在轨道宽度方向上的每个扇区中与另一个略微偏离。然后，跟踪图案，从而获得全轨道轮廓和微轨道轮廓。从该轮廓检测位置信号的变化，由此创建用于校正位置信号的非线性误差的表格。因此，测量写入/读回属性的分布，从而能够提高轨道密度。此外，检测和校正由头读回元件的特性变化引起的位置信号的变化，从而能够实现对象磁记录盘装置的高可靠性和高轨道密度。

3. 发明授权

US06473254B1 Method and system for compensation of nonlinearity or fluctuation of head-position signal 失效
公开(公告)号：US06473254B1
公开(公告)日：2002-10-29
申请号：US09506270
申请日：2000-02-17
申请人： Takehiko Hamaguchi , Futoshi Tomiyama , Hideki Zaitsu , Hisashi Takano
发明人： Takehiko Hamaguchi , Futoshi Tomiyama , Hideki Zaitsu , Hisashi Takano
IPC分类号： G11B509
CPC分类号： B82Y10/00 , B82Y25/00 , G11B5/012 , G11B5/3909 , G11B5/5552 , G11B5/59611 , G11B2005/001 , G11B2005/0016
摘要： A plurality of patterns are formed so that each is deviated slightly from another in each sector in the track width direction. Then, the pattern is followed up, thereby obtaining both a full-track profile and a micro-track profile. A variation of a position signal is detected from this profile, thereby creating a table for correcting the non-linearity error of the position signal. Consequently, the distribution of the write/read-back property is measured, thereby enabling the track density to be improved. Furthermore, a variation of the position signal caused by a property variation of the head read-back element is detected and corrected, thereby enabling a high reliability and a high track density to be realized for the object magnetic recording disk apparatus.

4. 发明授权

US06879460B2 Magnetic recording disk drive 有权
标题翻译：磁记录磁盘驱动器
公开(公告)号：US06879460B2
公开(公告)日：2005-04-12
申请号：US10681211
申请日：2003-10-09
申请人： Futoshi Tomiyama , Takehiko Hamaguchi , Toru Matsushita , Hideki Zaitsu , Reijiro Tsuchiya , Hisashi Takano
发明人： Futoshi Tomiyama , Takehiko Hamaguchi , Toru Matsushita , Hideki Zaitsu , Reijiro Tsuchiya , Hisashi Takano
IPC分类号： G11B5/09 , G11B5/55 , G11B5/56 , G11B5/596 , G11B15/04 , G11B21/02 , G11B21/10
CPC分类号： G11B5/5526 , G11B5/59633
摘要： A magnetic recording disk drive can prevent the deterioration of the head off-track characteristics and the reduction of the drive performance even when an erase band asymmetry resulting from a skew angle exists. A write inhibit slice value for an inner peripheral side offset is made smaller than a write inhibit slice value for an outer peripheral side offset at a position where an erase band on the inner peripheral side is greater than an erase band on the outer peripheral side, so that the adjacent track on the outer peripheral side cannot easily erase a data track. On the contrary, the inner periphery and the outer periphery are paraphrased at a position where the erase band on the outer peripheral side is greater than the erase band on the inner peripheral side.
摘要翻译：磁记录盘驱动器即使当存在由倾斜角度导致的擦除带不对称性时，也可以防止磁头偏离磁道特性的恶化和驱动性能的降低。使内周侧偏移的写禁止限幅值小于在内周侧的擦除频带大于外周侧的擦除频带的位置处的外周侧偏移的写禁止限幅值，使得外周侧的相邻轨道不能容易地擦除数据轨道。相反，内周侧和外周侧在外周侧的擦除带大于内周侧的擦除带的位置被释义。

5. 发明授权

US06717760B2 Magnetic disk drive 失效
标题翻译：磁盘驱动器
公开(公告)号：US06717760B2
公开(公告)日：2004-04-06
申请号：US10102651
申请日：2002-03-22
申请人： Takehiko Hamaguchi , Futoshi Tomiyama , Hideki Zaitsu , Hisashi Takano
发明人： Takehiko Hamaguchi , Futoshi Tomiyama , Hideki Zaitsu , Hisashi Takano
IPC分类号： G11B2736
CPC分类号： B82Y10/00 , B82Y25/00 , G11B5/012 , G11B5/3909 , G11B5/5552 , G11B5/59611 , G11B2005/001 , G11B2005/0016
摘要： A plurality of patterns are formed beforehand so that each of those patterns is deviated slightly from another in each sector in the track width direction, then the pattern is followed up, thereby obtaining both full-track profile and micro-track profile. A variation of a position signal is detected from this profile, thereby creating a table for correcting the non-linearity error of the position signal. Consequently, the distribution of the write/read-back property is measured, thereby enabling the track density to be improved. Furthermore, a variation of the position signal caused by a property variation of the head read-back element is detected and corrected, thereby enabling a high reliability and a high track density to be realized for the object magnetic recording disk apparatus.
摘要翻译：预先形成多个图案，使得这些图案中的每一个在轨道宽度方向上在每个扇区中与另一个图案稍微偏离，然后跟踪图案，从而获得全轨道轮廓和微轨道轮廓。从该轮廓检测位置信号的变化，从而创建用于校正位置信号的非线性误差的表格。因此，测量写入/读回属性的分布，从而使轨道密度为改进。此外，检测和校正由头读回元件的特性变化引起的位置信号的变化，从而能够实现对象磁记录盘装置的高可靠性和高轨道密度。

6. 发明授权

US06909566B1 Magnetic recording/reproducing device 失效
标题翻译：磁记录/再现装置
公开(公告)号：US06909566B1
公开(公告)日：2005-06-21
申请号：US10130953
申请日：2000-02-10
申请人： Hideki Zaitsu , Takehiko Hamaguchi , Futoshi Tomiyama
发明人： Hideki Zaitsu , Takehiko Hamaguchi , Futoshi Tomiyama
IPC分类号： G11B5/00 , G11B5/012 , G11B5/02 , G11B5/09 , G11B5/596 , G11B20/14 , G11B21/10 , G11B27/36
CPC分类号： G11B5/596 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/09 , G11B20/1403 , G11B21/106 , G11B2005/001
摘要： The invention relates to a magnetic recording/reproducing device in which a reproduce head is positioned where the crosstalk between adjacent tracks in a magnetic disk is minimized to maintain an adequate transfer rate in a system involving great crosstalk. The removal of crosstalk ensures the reproduction of the recorded data and thus increases the reliability of the magnetic recording/reproducing device. The magnetic recording/reproducing device according to this invention includes a magnetic disk on which a plurality of tracks are concentrically formed, and data are recorded at different frequencies on adjacent tracks.
摘要翻译：本发明涉及一种磁记录/再现装置，其中再现头被定位在磁盘中相邻轨道之间的串扰被最小化以在涉及大串扰的系统中保持适当的传送速率。串扰的去除确保了记录数据的再现，从而提高了磁记录/再现装置的可靠性。根据本发明的磁记录/再现装置包括其上同心地形成多个轨道的磁盘，并且在相邻轨道上以不同的频率记录数据。

7. 发明授权

US06760172B1 Magnetic disk drive 失效
标题翻译：磁盘驱动器
公开(公告)号：US06760172B1
公开(公告)日：2004-07-06
申请号：US09616073
申请日：2000-07-13
申请人： Takehiko Hamaguchi , Hideki Zaitsu , Futoshi Tomiyama
发明人： Takehiko Hamaguchi , Hideki Zaitsu , Futoshi Tomiyama
IPC分类号： G11B509
CPC分类号： G11B5/59633
摘要： To improve the track density by reducing the discontinuity of servo patterns to be generated by a servo track writer, some servo areas existing in one circuit of a magnetic disk are formed at the consecutive first and second circuits of a servo track writer by averaging a plurality of position signals detected from servo patterns at the first and second circuits of the magnetic disk.
摘要翻译：为了通过减少由伺服轨迹写入器产生的伺服模式的不连续性来提高轨道密度，存在于磁盘的一个电路中的一些伺服区域通过对伺服轨迹写入器的连续的第一和第二电路进行平均而形成，在磁盘的第一和第二电路处从伺服模式检测的位置信号。

8. 发明授权

US07031091B2 Magnetic recording apparatus and method of writing data at low temperature 失效
标题翻译：磁记录装置和低温写入数据的方法
公开(公告)号：US07031091B2
公开(公告)日：2006-04-18
申请号：US10648352
申请日：2003-08-27
申请人： Takayuki Ichihara , Futoshi Tomiyama , Hideki Zaitsu
发明人： Takayuki Ichihara , Futoshi Tomiyama , Hideki Zaitsu
IPC分类号： G11B21/02
CPC分类号： G11B5/09 , G11B33/144
摘要： Deterioration in recording performance immediately after the start of recording in a magnetic recording apparatus due to the contraction of the magnetic head element in low atmospheric temperatures is prevented, thus ensuring a stable recording performance irrespective of the ambient temperature. Upon reception of a recording command for first data from a host device, second data already recorded in the same track as that of a data area where information is to be recorded is read and then stored in a memory. Dummy data is then recorded in the data area on the track, and then the first and second data stored in the memory is recorded. Magnetic disc apparatuses for car navigation systems, where stable operation under low temperatures is required, can be provided at low cost.
摘要翻译：防止由于磁头元件在低气氛温度下的收缩而在磁记录装置中开始记录之后的记录性能的劣化，从而确保与环境温度无关的稳定的记录性能。在从主机设备接收到用于第一数据的记录命令时，已经记录在与要记录信息的数据区的轨道相同的轨道中的第二数据被读取，然后被存储在存储器中。然后将伪数据记录在轨道上的数据区域中，然后记录存储在存储器中的第一和第二数据。可以以低成本提供需要在低温下稳定运行的用于汽车导航系统的磁盘装置。

9. 发明授权

US06635367B2 Magnetic recording medium 有权
公开(公告)号：US06635367B2
公开(公告)日：2003-10-21
申请号：US09941798
申请日：2001-08-30
申请人： Masukazu Igarashi , Fumiko Akagi , Hideki Zaitsu , Futoshi Tomiyama
发明人： Masukazu Igarashi , Fumiko Akagi , Hideki Zaitsu , Futoshi Tomiyama
IPC分类号： G11B566
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/24942
摘要： An object is to provide a magnetic recording medium giving high resolution, low noise and little thermal fluctuation and thus suitable for high density magnetic recording, and a high-capacity magnetic recording device realized by using this medium. A thin film type magnetic recording medium is used, having at least 2 magnetic layers formed on a non-magnetic substrate and a non-magnetic intermediate layer that is interposed between the magnetic layers and causes the magnetizations of the magnetic layers to be anti-parallel to one another, and wherein the ratio HkB/HkA of the anisotropic magnetic field strength HkB of the magnetic layer on the side near to the substrate to the anisotropic magnetic field strength HkA of the magnetic layer on the side far from the substrate is 0.7 or less, more preferably at least 0.4 and not more than 0.65.

10. 发明授权

US08248893B2 Energy-assisted magnetic-recording head having a magnetic-recording assistance element disposed to lower magnetic-recording field for reversing magnetization in a magnetic-recording disk 有权
标题翻译：能量辅助磁记录头具有磁记录辅助元件，该磁记录辅助元件设置成降低用于使磁记录盘中的磁化反转的磁记录场
公开(公告)号：US08248893B2
公开(公告)日：2012-08-21
申请号：US12573069
申请日：2009-10-02
申请人： Masafumi Mochizuki , Hiroyasu Tanabe , Hideki Zaitsu , Hideaki Maeda
发明人： Masafumi Mochizuki , Hiroyasu Tanabe , Hideki Zaitsu , Hideaki Maeda
IPC分类号： G11B11/00
CPC分类号： G11B5/314 , G11B5/3116 , G11B5/6088 , G11B2005/0005 , G11B2005/0021
摘要： A head-slider configured to fly in proximity to a recording surface of a magnetic-recording disk. The head-slider includes a write element including a main pole configured to generate a magnetic-recording field from a pole tip of the main pole in a first localized portion of the magnetic-recording disk. The head-slider also includes a magnetic-recording assistance element configured to provide energy to a second localized portion of the magnetic-recording disk in order to increase reversibility of a magnetization in a first localized portion of the magnetic-recording disk. A width of the pole tip of the main pole on a leading-edge side is wider than a width of the pole tip of the main pole on a trailing-edge side.
摘要翻译：头部滑动器，其构造成在磁记录盘的记录表面附近飞行。磁头滑块包括写入元件，该写入元件包括主磁极，该主极被配置为在磁记录盘的第一局部部分中从主极的极尖产生磁记录场。磁头滑动器还包括磁记录辅助元件，其被配置为向磁记录盘的第二局部部分提供能量，以增加磁记录盘的第一局部部分中的磁化的可逆性。前缘侧的主极的极尖的宽度比后缘侧的主极的极尖的宽度宽。

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