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1. 发明申请

US20120194939A1 PATTERNED MEDIUM INSPECTION METHOD AND INSPECTION APPARATUS 审中-公开
标题翻译：中型检验方法和检验仪器
公开(公告)号：US20120194939A1
公开(公告)日：2012-08-02
申请号：US13316668
申请日：2011-12-12
申请人： Takuma NISHIMOTO , Masami Makuuchi , Yoshihiro Sakurai , Kunihito Higa , Fujio Onishi
发明人： Takuma NISHIMOTO , Masami Makuuchi , Yoshihiro Sakurai , Kunihito Higa , Fujio Onishi
IPC分类号： G11B5/09
CPC分类号： G11B5/09 , B82Y10/00 , G11B5/012 , G11B20/10435 , G11B2220/2516 , G11B2220/252
摘要： A patterned medium inspection method according to the present invention includes a timing computation process including a read process reading the reproduced signal of a patterned medium under inspection and a computation process computing the signal interval values from the patterned medium reproduced signal read in the read process, and a judgment process judging the quality of the patterned medium using the reproduced signal interval values computed in the computation process.
摘要翻译：根据本发明的图案化介质检查方法包括定时计算处理，其包括读取正在检查的图案化介质的再现信号的读取处理，以及从读取处理中读取的图案化介质再生信号计算信号间隔值的计算处理，以及使用在计算处理中计算出的再现信号间隔值来判断图案化介质的质量的判断处理。

2. 发明申请

US20110211277A1 DETECTING CIRCUIT AND INSPECTING APPARATUS 审中-公开
标题翻译：检测电路和检测装置
公开(公告)号：US20110211277A1
公开(公告)日：2011-09-01
申请号：US13021846
申请日：2011-02-07
申请人： Takuma NISHIMOTO , Masami Makuuchi , Yoshihiro Sakurai , Kunihito Higa
发明人： Takuma NISHIMOTO , Masami Makuuchi , Yoshihiro Sakurai , Kunihito Higa
IPC分类号： G11B21/02 , G05B1/02
CPC分类号： G11B5/59616 , G11B5/455 , G11B5/4555
摘要： A detecting circuit, which can detect plural types of servo signals, including a cosine/sine value detector for sampling a servo signal supplied from an inspected object and thereby obtaining a cosine value and a sine value, an amplitude/phase detector for obtaining at least amplitude information and phase information on the basis of the cosine value and the sine value obtained by the cosine/sine value detector, and a servo selector/position detector for selecting a servo scheme of the inspected object and detecting a position of the inspected object on the basis of the amplitude information and the phase information obtained by the amplitude/phase detector.
摘要翻译：一种检测电路，其可以检测多种类型的伺服信号，包括余弦/正弦值检测器，用于对从检查对象提供的伺服信号进行采样，从而获得余弦值和正弦值;振幅/相位检测器，用于至少获得基于由余弦/正弦值检测器获得的余弦值和正弦值的幅度信息和相位信息，以及用于选择被检查对象的伺服方案并检测被检查对象的位置的伺服选择器/位置检测器由振幅/相位检测器得到的振幅信息和相位信息的基础。

3. 发明申请

US20090073602A1 SERVO INFORMATION WRITING METHOD, MAGNETIC HEAD TESTER AND MAGNETIC DISK TESTER USING THE SERVO INFORMATION WRITING METHOD 有权
标题翻译：伺服信息写入方法，磁头测试仪和磁盘测试仪使用伺服信息写作方法
公开(公告)号：US20090073602A1
公开(公告)日：2009-03-19
申请号：US12204283
申请日：2008-09-04
申请人： Yoshihiro Sakurai , Hitoshi Otani , Kunihito Higa , Yukio Yamamoto
发明人： Yoshihiro Sakurai , Hitoshi Otani , Kunihito Higa , Yukio Yamamoto
IPC分类号： G11B5/596
CPC分类号： G11B19/048 , G11B5/5552 , G11B5/59633 , G11B5/59666
摘要： A mark information is recorded in an area which is on a circumference of a magnetic disk corresponding to a last track in which a servo information write is ended or a track, which is one or two in front of the last track in which servo information is not written and the mark information is detected by returning a magnetic head in a radial direction of the magnetic disk by a fine movement stage after the magnetic head is moved to a next aimed track by a coarse movement stage. The servo information write position is detected by the magnetic head and the servo information is written in a servo information write position of a next track by positioning the magnetic head therein by using the fine movement stage.
摘要翻译：标记信息被记录在与伺服信息写入的最后轨道相对应的磁盘的圆周上的区域中，或者在伺服信息为最后轨道的前面的一个或两个轨迹在通过粗略移动阶段将磁头移动到下一个目标轨道之后，通过微细移动台返回磁盘的径向方向的磁头来检测标记信息。通过磁头检测伺服信息写入位置，并且通过使用微动载台将磁头定位在其中，将伺服信息写入下一轨道的伺服信息写入位置。

4. 发明授权

US08605378B2 Inspection device and inspection method for inspecting magnetic disk or magnetic head 失效
标题翻译：用于检查磁盘或磁头的检查装置和检查方法
公开(公告)号：US08605378B2
公开(公告)日：2013-12-10
申请号：US13372536
申请日：2012-02-14
申请人： Yoshihiro Sakurai , Kunihito Higa , Yukio Yamamoto
发明人： Yoshihiro Sakurai , Kunihito Higa , Yukio Yamamoto
IPC分类号： G11B27/36
CPC分类号： G11B5/59627 , G11B20/10222 , G11B2220/2516
摘要： The present invention realizes reduction of position information demodulation errors caused by the eccentricity of the magnetic disk and improvement of position signal detection accuracy, as well as enabling quick eccentricity clock correction for arbitrary clock frequencies. An inspection device in accordance with the present invention comprises: a servo demodulation unit which demodulates servo information; a PLL clock generating unit which generates a reference clock and supplies the reference clock to the servo demodulation unit; and a tester control unit. The PLL clock generating unit includes an eccentricity correction circuit for correcting the frequency of the reference clock depending on the eccentricity of the magnetic disk. The tester control unit generates correction data for correcting the frequency of the reference clock, multiplies the correction data by the inverse of a transfer function of the PLL clock generating unit, and supplies the product to the eccentricity correction circuit.
摘要翻译：本发明实现了由磁盘的偏心引起的位置信息解调错误的减少和位置信号检测精度的提高，以及对任意时钟频率进行快速偏心时钟校正。根据本发明的检查装置包括：解调伺服信息的伺服解调单元; PLL时钟产生单元，其产生参考时钟并将参考时钟提供给伺服解调单元; 和测试仪控制单元。 PLL时钟产生单元包括偏心校正电路，用于根据磁盘的偏心度校正参考时钟的频率。测试器控制单元产生用于校正参考时钟的频率的校正数据，将校正数据乘以PLL时钟产生单元的传递函数的倒数，并将该乘积提供给偏心校正电路。

5. 发明授权

US08279551B2 Head positioning method for eccentric track and head positioning control device 有权
标题翻译：用于偏心轨道和头部定位控制装置的头部定位方法
公开(公告)号：US08279551B2
公开(公告)日：2012-10-02
申请号：US12709847
申请日：2010-02-22
申请人： Kunihito Higa , Yoshihiro Sakurai , Yukio Yamamoto
发明人： Kunihito Higa , Yoshihiro Sakurai , Yukio Yamamoto
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： Drive waveforms with which extension and contraction characteristics of an actuator corresponding to a number of track eccentricity amounts are stored as data. By reading servo information written in a disk is obtained as a signal indicating a head displacement amount from a track. The head is moved in a direction in which the track is displaced by obtaining an amplitude corresponding to a slip amount of the head position and a rotation angle of maximum eccentricity, reading drive waveforms which is optimal in driving the actuator from the memory and driving the actuator with a drive waveform matched with the rotation angle at which the eccentricity is maximum.
摘要翻译：将与多个轨道偏心量相对应的致动器的延伸和收缩特性作为数据存储的驱动波形。通过读取写入盘中的伺服信息作为指示来自轨道的头位移量的信号获得。通过获得对应于头部位置的滑动量和最大偏心的旋转角度的幅度，使头部沿着轨道移位的方向移动，读取从存储器驱动致动器最佳的驱动波形，并驱动致动器具有与偏心度最大的旋转角度匹配的驱动波形。

6. 发明授权

US07768737B2 Servo information writing method, magnetic head tester and magnetic disk tester using the servo information writing method 有权
标题翻译：伺服信息写入方式，磁头测试仪和磁盘测试仪采用伺服信息写入方式
公开(公告)号：US07768737B2
公开(公告)日：2010-08-03
申请号：US12204283
申请日：2008-09-04
申请人： Yoshihiro Sakurai , Hitoshi Otani , Kunihito Higa , Yukio Yamamoto
发明人： Yoshihiro Sakurai , Hitoshi Otani , Kunihito Higa , Yukio Yamamoto
IPC分类号： G11B21/02 , G11B5/596 , G11B27/36
CPC分类号： G11B19/048 , G11B5/5552 , G11B5/59633 , G11B5/59666
摘要： A mark information is recorded in an area which is on a circumference of a magnetic disk corresponding to a last track in which a servo information write is ended or a track, which is one or two in front of the last track in which servo information is not written and the mark information is detected by returning a magnetic head in a radial direction of the magnetic disk by a fine movement stage after the magnetic head is moved to a next aimed track by a coarse movement stage. The servo information write position is detected by the magnetic head and the servo information is written in a servo information write position of a next track by positioning the magnetic head therein by using the fine movement stage.
摘要翻译：标记信息被记录在与伺服信息写入的最后轨道相对应的磁盘的圆周上的区域中，或者在伺服信息为最后轨道的前面的一个或两个轨迹在通过粗略移动阶段将磁头移动到下一个目标轨道之后，通过微细移动台返回磁盘的径向方向的磁头来检测标记信息。通过磁头检测伺服信息写入位置，并且通过使用微动载台将磁头定位在其中，将伺服信息写入下一轨道的伺服信息写入位置。

7. 发明申请

US20090284862A1 HEAD POSITION CONTROL METHOD, HEAD POSITION CONTROL DEVICE, AND MAGNETIC RECORDING EVALUATION APPARATUS 失效
标题翻译：头位置控制方法，头位置控制装置和磁记录评估装置
公开(公告)号：US20090284862A1
公开(公告)日：2009-11-19
申请号：US12369787
申请日：2009-02-12
申请人： Yukio YAMAMOTO , Yoshihiro Sakurai , Kunihito Higa
发明人： Yukio YAMAMOTO , Yoshihiro Sakurai , Kunihito Higa
IPC分类号： G11B21/02
CPC分类号： G11B19/048 , G11B5/455 , G11B5/5582 , G11B5/59627
摘要： A magnetic head position control method is provided to control a magnetic head to follow the track on a DTM disk by accurately detecting the eccentricity compensation amount through a simple process. An angle detection unit detects θ1 at which the relative displacement between the magnetic head and the tracks on the DTM disk has a peak with no vibration data added. A vibration data calculation unit calculates first vibration data with first vibration amplitude, so that the displacement has a peak at θ2 displaced from θ1 by a predetermined value. The angle detection unit detects θ3 at which the relative displacement has a peak with the first vibration data added. A compensation data calculation unit calculates compensation data for the eccentricity of the tracks, from the detected angles θ1, θ3, the first vibration amplitude, and θ2. The position of the magnetic head is compensated according to the correction data.
摘要翻译：提供磁头位置控制方法，通过简单的过程精确地检测偏心补偿量来控制磁头跟随DTM盘上的轨道。角度检测单元检测在磁头和DTM盘上的轨道之间的相对位移具有峰值而没有添加振动数据的θ1。振动数据计算单元以第一振动振幅计算第一振动数据，使得位移在θ1处具有从θ1偏移预定值的峰值。角度检测单元检测相对位移在第一振动数据相加时具有峰值的θ3。补偿数据计算单元从检测到的角度θ1，θ3，第一振动振幅和θ2中计算轨道的偏心度的补偿数据。磁头的位置根据校正数据进行补偿。

8. 发明授权

US08643966B2 Inspection device or inspection method for magnetic head or magnetic disc, and magnetic disc recording device and magnetic disc recording method 失效
标题翻译：用于磁头或磁盘的检查装置或检查方法，以及磁盘记录装置和磁盘记录方法
公开(公告)号：US08643966B2
公开(公告)日：2014-02-04
申请号：US13207510
申请日：2011-08-11
申请人： Kazuhiko Kishie , Kunihito Higa , Yoshihiro Sakurai
发明人： Kazuhiko Kishie , Kunihito Higa , Yoshihiro Sakurai
IPC分类号： G11B27/36
CPC分类号： G11B5/59655 , G11B5/59688
摘要： An inspection device or inspection method for a magnetic head or magnetic disc which can form a servo pattern applicable to a write system, and a magnetic disc recording device or magnetic disc recording method. In inspection or recording of a magnetic disc, which rotates the magnetic disc, a servo pattern is written into a servo pattern region of the magnetic disc by a write-in element of a magnetic head, and is read by a read-in element of the magnetic head. Servo following of a position of the magnetic head on the magnetic disc is performed based on the servo pattern which comprises a plurality of patterns. The patterns are written-in with a first frequency for causing the patterns to be subjected to the servo following and, the patterns are overwritten with a second frequency different from the first frequency, except a servo following width used in the servo following.
摘要翻译：一种可形成适用于写入系统的伺服模式的磁头或磁盘的检查装置或检查方法，以及磁盘记录装置或磁盘记录方法。在磁盘旋转的磁盘的检查或记录中，通过磁头的写入元件将伺服图案写入磁盘的伺服图案区域，并通过读取元件读取磁头。基于包括多个图案的伺服图案执行磁头在磁盘上的位置之后的伺服。以第一频率写入模式，使得模式经受伺服跟随，除了在伺服跟随中使用的伺服跟随宽度之外，以与第一频率不同的第二频率覆盖模式。

9. 发明申请

US20120250175A1 INSPECTION DEVICE AND INSPECTION METHOD FOR INSPECTING MAGNETIC DISK OR MAGNETIC HEAD 失效
标题翻译：用于检查磁盘或磁头的检查装置和检查方法
公开(公告)号：US20120250175A1
公开(公告)日：2012-10-04
申请号：US13372536
申请日：2012-02-14
申请人： Yoshihiro Sakurai , Kunihito Higa , Yukio Yamamoto
发明人： Yoshihiro Sakurai , Kunihito Higa , Yukio Yamamoto
IPC分类号： G11B27/36
CPC分类号： G11B5/59627 , G11B20/10222 , G11B2220/2516
摘要： The present invention realizes reduction of position information demodulation errors caused by the eccentricity of the magnetic disk and improvement of position signal detection accuracy, as well as enabling quick eccentricity clock correction for arbitrary clock frequencies. An inspection device in accordance with the present invention comprises: a servo demodulation unit which demodulates servo information; a PLL clock generating unit which generates a reference clock and supplies the reference clock to the servo demodulation unit; and a tester control unit. The PLL clock generating unit includes an eccentricity correction circuit for correcting the frequency of the reference clock depending on the eccentricity of the magnetic disk. The tester control unit generates correction data for correcting the frequency of the reference clock, multiplies the correction data by the inverse of a transfer function of the PLL clock generating unit, and supplies the product to the eccentricity correction circuit.
摘要翻译：本发明实现了由磁盘的偏心引起的位置信息解调错误的减少和位置信号检测精度的提高，以及对任意时钟频率进行快速偏心时钟校正。根据本发明的检查装置包括：解调伺服信息的伺服解调单元; PLL时钟产生单元，其产生参考时钟并将参考时钟提供给伺服解调单元; 和测试仪控制单元。 PLL时钟产生单元包括偏心校正电路，用于根据磁盘的偏心度校正参考时钟的频率。测试器控制单元产生用于校正参考时钟的频率的校正数据，将校正数据乘以PLL时钟产生单元的传递函数的倒数，并将该乘积提供给偏心校正电路。

10. 发明申请

US20120057255A1 INSPECTION DEVICE OR INSPECTION METHOD FOR MAGNETIC HEAD OR MAGNETIC DISC, AND MAGNETIC DISC RECORDING DEVICE AND MAGNETIC DISC RECORDING METHOD 失效
标题翻译：用于磁头或磁盘的检查装置或检查方法，以及磁盘记录装置和磁盘记录方法
公开(公告)号：US20120057255A1
公开(公告)日：2012-03-08
申请号：US13207510
申请日：2011-08-11
申请人： Kazuhiko KISHIE , Kunihito Higa , Yoshihiro Sakurai
发明人： Kazuhiko KISHIE , Kunihito Higa , Yoshihiro Sakurai
IPC分类号： G11B27/36
CPC分类号： G11B5/59655 , G11B5/59688
摘要： An inspection device or inspection method for a magnetic head or magnetic disc which can form a servo pattern applicable to a write system, and a magnetic disc recording device or magnetic disc recording method. In inspection or recording of a magnetic disc, which rotates the magnetic disc, a servo pattern is written into a servo pattern region of the magnetic disc by a write-in element of a magnetic head, and is read by a read-in element of the magnetic head. Servo following of a position of the magnetic head on the magnetic disc is performed based on the servo pattern which comprises a plurality of patterns. The patterns are written-in with a first frequency for causing the patterns to be subjected to the servo following and, the patterns are overwritten with a second frequency different from the first frequency, except a servo following width used in the servo following.
摘要翻译：一种可形成适用于写入系统的伺服模式的磁头或磁盘的检查装置或检查方法，以及磁盘记录装置或磁盘记录方法。在磁盘旋转的磁盘的检查或记录中，通过磁头的写入元件将伺服图案写入磁盘的伺服图案区域，并通过读取元件读取磁头。基于包括多个图案的伺服图案执行磁头在磁盘上的位置之后的伺服。以第一频率写入模式，使得模式经受伺服跟随，除了在伺服跟随中使用的伺服跟随宽度之外，以与第一频率不同的第二频率覆盖模式。

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