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1. 发明授权

US06356402B2 Recording equalizer and magnetic recording/reproducing apparatus using the equalizer 失效
标题翻译：使用均衡器的记录均衡器和磁记录/再现装置
公开(公告)号：US06356402B2
公开(公告)日：2002-03-12
申请号：US09790613
申请日：2001-02-23
申请人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
发明人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/035 , G11B5/09 , G11B20/10009 , G11B20/10194 , G11B20/14 , G11B2005/001 , G11B2005/0016 , G11B2020/10981
摘要： A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after the recording object bit and a calculator for calculating a precompensation parameter using the bits stored in the buffer. The calculator calculates the preconpensation parameter of the recording object bit by linearly adding influence of a transition existing at a two-previous bit of the recording object bit, influences of a transition at a one-previous bit of the recording object bit and influences of a transition existing at one-following bit of the recording object bit and further adding an offset. The offset is determined to a value such that a write timing of the magnetic information is corrected always in a delaying direction.
摘要翻译：当在磁记录介质上用磁记录头记录磁信息时，用于校正磁信息的写定时的记录均衡器包括：用于存储记录对象位的缓冲器和记录对象位之前和之后的位;以及计算器，使用存储在缓冲器中的位来计算预补偿参数。计算器通过线性地添加存在于记录对象位的前两位的转变的影响，记录对象位的前一位的转变的影响和影响的影响来计算记录对象位的前置补偿参数存在于记录对象位的一个后续位的转换，并进一步添加偏移。偏移被确定为使得磁信息的写入定时总是以延迟方向校正的值。

2. 发明授权

US06728051B2 Recording equalizer and magnetic recording/reproducing apparatus using the equalizer 有权
标题翻译：使用均衡器的记录均衡器和磁记录/再现装置
公开(公告)号：US06728051B2
公开(公告)日：2004-04-27
申请号：US10388466
申请日：2003-03-17
申请人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
发明人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/035 , G11B5/09 , G11B20/10009 , G11B20/10194 , G11B20/14 , G11B2005/001 , G11B2005/0016 , G11B2020/10981
摘要： A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after the recording object bit and a calculator for calculating a precompensation parameter using the bits stored in the buffer. The calculator calculates the preconpensation parameter of the recording object bit by linearly adding influence of a transition existing at a two-previous bit of the recording object bit, influences of a transition at a one-previous bit of the recording object bit and influences of a transition existing at one-following bit of the recording object bit and further adding an offset. The offset is determined to a value such that a write timing of the magnetic information is corrected always in a delaying direction.
摘要翻译：当在磁记录介质上用磁记录头记录磁信息时，用于校正磁信息的写定时的记录均衡器包括：用于存储记录对象位的缓冲器和记录对象位之前和之后的位;以及计算器，使用存储在缓冲器中的位来计算预补偿参数。计算器通过线性地添加存在于记录对象位的前两位的转变的影响，记录对象位的前一位的转变的影响和影响的影响来计算记录对象位的前置补偿参数存在于记录对象位的一个后续位的转换，并进一步添加偏移。偏移被确定为使得磁信息的写入定时总是以延迟方向校正的值。

3. 发明授权

US06549355B2 Recording equalizer and magnetic recording/reproducing apparatus using the equalizer 有权
标题翻译：使用均衡器的记录均衡器和磁记录/再现装置
公开(公告)号：US06549355B2
公开(公告)日：2003-04-15
申请号：US10231089
申请日：2002-08-30
申请人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
发明人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/035 , G11B5/09 , G11B20/10009 , G11B20/10194 , G11B20/14 , G11B2005/001 , G11B2005/0016 , G11B2020/10981
摘要： A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after the recording object bit and a calculator for calculating a precompensation parameter using the bits stored in the buffer. The calculator calculates the precompensation parameter of the recording object bit by linearly adding influence of a transition existing at a two-previous bit of the recording object bit, influences of a transition at a one-previous bit of the recording object bit and influences of a transition existing at one-following bit of the recording object bit and further adding an offset. The offset is determined to a value such that a write timing of the magnetic information is corrected always in a delaying direction.
摘要翻译：当在磁记录介质上用磁记录头记录磁信息时，用于校正磁信息的写定时的记录均衡器包括：用于存储记录对象位的缓冲器和记录对象位之前和之后的位;以及计算器，使用存储在缓冲器中的位来计算预补偿参数。计算器通过线性地添加存在于记录对象位的两个先前位的转变的影响，记录对象位的前一位的转变的影响以及a的前一位的影响来计算记录对象位的预补偿参数存在于记录对象位的一个后续位的转换，并进一步添加偏移。偏移被确定为使得磁信息的写入定时总是以延迟方向校正的值。

4. 发明授权

US06487031B2 Recording equalizer and magnetic recording/reproducing apparatus using the equalizer 失效
公开(公告)号：US06487031B2
公开(公告)日：2002-11-26
申请号：US10079492
申请日：2002-02-22
申请人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
发明人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/035 , G11B5/09 , G11B20/10009 , G11B20/10194 , G11B20/14 , G11B2005/001 , G11B2005/0016 , G11B2020/10981
摘要： A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after the recording object bit and a calculator for calculating a precompensation parameter using the bits stored in the buffer. The calculator calculates the preconpensation parameter of the recording object bit by linearly adding influence of a transition existing at a two-previous bit of the recording object bit, influences of a transition at a one-previous bit of the recording object bit and influences of a transition existing at one-following bit of the recording object bit and further adding an offset. The offset is determined to a value such that a write timing of the magnetic information is corrected always in a delaying direction.

5. 发明授权

US06212024B1 Recording equalizer and magnetic recording/reproducing apparatus performing write timing compensation 失效
标题翻译：记录均衡器和执行写时序补偿的磁记录/再现装置
公开(公告)号：US06212024B1
公开(公告)日：2001-04-03
申请号：US09085860
申请日：1998-05-28
申请人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
发明人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/035 , G11B5/09 , G11B20/10009 , G11B20/10194 , G11B20/14 , G11B2005/001 , G11B2005/0016 , G11B2020/10981
摘要： A recording equalizer for precompensating of a write timing of magnetic information when the magnetic information is recorded by a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after said recording object bit, and a calculator for calculating and outputting a precompensation parameter using the bits stored in the buffer by adding an offset C, having a value such as to always delay the write timing of the magnetic information, to an amount of shift determined using the bits stored in the buffer and the head velocity relative to the medium.
摘要翻译：当在磁记录介质上由磁记录头记录磁信息时，用于对磁信息的写定时进行预补偿的记录均衡器包括用于存储记录对象位的缓冲器以及所述记录对象位之前和之后的位，以及计算器，用于使用存储在缓冲器中的位来计算和输出预补偿参数，该偏移量具有将始终将磁信息的写入定时延迟的值的偏移量与使用存储在缓冲器中的位确定的移位量相加和头部速度相对于介质。

6. 发明授权

US06456448B1 Magnetic recording system including magnetic recording medium having three-dimensional random orientation of axis of easy magnetization 失效
标题翻译：磁记录系统包括磁记录介质，其具有易磁化轴的三维随机取向
公开(公告)号：US06456448B1
公开(公告)日：2002-09-24
申请号：US09435036
申请日：1999-11-05
申请人： Fumiko Akagi , Masukazu Igarashi , Kazuetsu Yoshida , Akira Ishikawa
发明人： Fumiko Akagi , Masukazu Igarashi , Kazuetsu Yoshida , Akira Ishikawa
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B5/64 , G11B5/82 , G11B2005/001
摘要： A magnetic recording system which can suppress an influence by a thermal fluctuation and is suitable for the high density magnetic recording in which excellent S/N ratio and resolution are obtained is provided. There is provided a magnetic recording system constructed by: a magnetic recording medium having a magnetic layer formed on a substrate through an underlayer; a driving unit for driving the medium in the recording direction; a magnetic head constructed by a recording unit and a reproducing unit; an apparatus for relatively moving the magnetic head to the magnetic recording medium; and a recording reproduction signal processing apparatus for performing a signal input to the magnetic head and an output signal reproduction from the magnetic head, wherein the reproducing unit of the magnetic head is constructed by a magneto-resistance effect type head and the system has a recording magnetization pattern in which a magnetization transition length of the magnetic recording medium is equal to 70 nm or less, the direction of an axis of easy magnetization of the magnetic particles in the magnetic layer of the magnetic recording medium is three-dimensionally oriented. Even after the elapse of 100 hours after the recording and at a linear recording density of 360 kfci, a reproduction output hardly decreases. A degree of deterioration of the S/N ratio of the output to the noises and the resolution are smaller than that of the conventional system.
摘要翻译：能够抑制热波动的影响的磁记录系统，适用于获得优异的S / N比和分辨率的高密度磁记录。提供一种磁记录系统，其通过以下方式构成：磁记录介质，其具有通过底层在基板上形成的磁性层; 用于在记录方向上驱动介质的驱动单元; 由记录单元和再现单元构成的磁头; 用于将磁头相对移动到磁记录介质的装置; 以及用于执行向磁头输入的信号和从磁头再现的输出信号的记录再现信号处理装置，其中磁头的再现单元由磁阻效应型磁头构成，并且系统具有记录磁记录介质的磁化转变长度等于或小于70nm的磁化模式，磁记录介质的磁性层中的磁性颗粒容易磁化的轴的方向是三维取向的。即使在记录100小时后，线性记录密度为360kfci，再现输出几乎不降低。输出与噪声的S / N比和分辨率的劣化程度小于常规系统的劣化程度。

7. 发明授权

US06349008B1 Magnetic recording media, magnetic heads and magnetic read-write apparatus using the same 失效
标题翻译：具有易倾斜倾斜轴的磁读写装置
公开(公告)号：US06349008B1
公开(公告)日：2002-02-19
申请号：US09176114
申请日：1998-10-21
申请人： Takanobu Takayama , Kiwamu Tanahashi , Kazuetsu Yoshida , Mikio Suzuki , Yoshiyuki Hirayama , Masaaki Futamoto , Yohji Maruyama
发明人： Takanobu Takayama , Kiwamu Tanahashi , Kazuetsu Yoshida , Mikio Suzuki , Yoshiyuki Hirayama , Masaaki Futamoto , Yohji Maruyama
IPC分类号： G11B502
CPC分类号： G11B5/656 , G11B5/012 , G11B5/1278 , G11B5/62 , G11B5/82
摘要： A magnetic recording medium wherein, when the axis of easy magnetization of the magnetic recording medium for magnetically recording information by means of a magnetic head is projected onto a surface of the magnetic recording medium, the axis projected onto the surface of the magnetic recording medium exists so as to be unidirectionally inclined with respect to the direction of a track on which information is to be recorded, whereby, by using the magnetic recording medium, there can be provided a magnetic head and a magnetic read-write apparatus greatly improved in longitudinal recording density.
摘要翻译：一种磁记录介质，其中当用于通过磁头磁信息记录的磁记录介质的易磁化轴被投影到磁记录介质的表面上时，投射到磁记录介质的表面上的轴存在相对于要记录信息的轨道的方向是单向倾斜的，由此通过使用磁记录介质，可以提供在纵向记录中大大改进的磁头和磁读写装置密度。

8. 发明授权

US06671116B2 Magnetic recording system including magnetic recording medium having three-dimensional random orientation of axis of easy magnetization 失效
公开(公告)号：US06671116B2
公开(公告)日：2003-12-30
申请号：US10044929
申请日：2002-01-15
申请人： Fumiko Akagi , Masukazu Igarashi , Kazuetsu Yoshida , Akira Ishikawa
发明人： Fumiko Akagi , Masukazu Igarashi , Kazuetsu Yoshida , Akira Ishikawa
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B5/64 , G11B5/82 , G11B2005/001
摘要： A magnetic recording system includes a magnetic recording medium including a magnetic layer, the magnetic layer being composed of magnetic grains, and a magnetic head including a recording unit and a reproducing unit. An orientation of an axis of easy magnetization of the magnetic grains is three-dimensionally distributed. An average angle between a direction of an axis of easy magnetization of each of the magnetic grains and a surface of the magnetic recording medium is within a range of 20° to 30°. A squareness ratio Mr/Ms of a remanent magnetization Mr of the magnetic recording medium to a saturation magnetization Ms of the magnetic recording medium is equal to 0.5 or more and is equal to 0.6 or less. A recording density of information which is recorded onto the magnetic recording medium is equal to 360 kfci or more.

9. 发明授权

US5875082A Magnetic recording media, magnetic heads and magnetic read-write apparatus using the same 失效
标题翻译：磁记录介质，磁头和使用其的磁读写装置
公开(公告)号：US5875082A
公开(公告)日：1999-02-23
申请号：US794709
申请日：1997-02-04
申请人： Takanobu Takayama , Kiwamu Tanahashi , Kazuetsu Yoshida , Mikio Suzuki , Yoshiyuki Hirayama , Masaaki Futamoto , Yohji Maruyama
发明人： Takanobu Takayama , Kiwamu Tanahashi , Kazuetsu Yoshida , Mikio Suzuki , Yoshiyuki Hirayama , Masaaki Futamoto , Yohji Maruyama
IPC分类号： G11B5/82 , G11B5/09 , G11B5/56 , G11B5/62 , G11B5/64 , G11B5/65 , G11B5/667 , G11B5/85
CPC分类号： G11B5/656 , G11B5/62
摘要： A magnetic recording medium wherein, when the axis of easy magnetization of the magnetic recording medium for magnetically recording information by means of a magnetic head is projected onto a surface of the magnetic recording medium, the axis projected onto the surface of the magnetic recording medium exists so as to be unidirectionally inclined with respect to the direction of a track on which information is to be recorded, whereby, by using the magnetic recording medium, there can be provided a magnetic head and a magnetic read-write apparatus greatly improved in longitudinal recording density.
摘要翻译：一种磁记录介质，其中当用于通过磁头磁信息记录的磁记录介质的易磁化轴被投影到磁记录介质的表面上时，投射到磁记录介质的表面上的轴存在相对于要记录信息的轨道的方向是单向倾斜的，由此通过使用磁记录介质，可以提供在纵向记录中大大改进的磁头和磁读写装置密度。

10. 发明授权

US5723198A Multi-layered magnetic recording medium and magnetic recording system employing the same 失效
标题翻译：多层磁记录介质和采用该磁记录介质的磁记录系统
公开(公告)号：US5723198A
公开(公告)日：1998-03-03
申请号：US258923
申请日：1994-06-13
申请人： 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
发明人： 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分类号： G11B5/66
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/24355 , Y10T428/24942 , Y10T428/265
摘要： 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.
摘要翻译：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。

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