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1. 发明授权

US07929255B2 Magnetic head inspection system, magnetic head inspection method and magnetic disk drive manufacturing method 有权
标题翻译：磁头检测系统，磁头检测方法和磁盘驱动器制造方法
公开(公告)号：US07929255B2
公开(公告)日：2011-04-19
申请号：US12072751
申请日：2008-02-27
申请人： Hiroshi Umezaki , Shinichi Iwasa
发明人： Hiroshi Umezaki , Shinichi Iwasa
IPC分类号： G11B21/10
CPC分类号： G11B5/455 , G11B27/36
摘要： Embodiments of the present invention provide a magnetic head inspection system having a simple configuration capable of inspecting magnetic heads. According to one embodiment, the magnetic head inspection system comprises an inspection module which is provided with a magnetic disk where servo data including track identifier information are recorded, a spindle motor, a carriage having a mount structure to which a head assembly containing a magnetic head is secured, a voice coil motor and a main circuit section. An inspection circuit section instructs the main circuit section to execute control so as to move the magnetic head to a specific track and perform a certain read write operation by the magnetic head in order to inspect the magnetic head.
摘要翻译：本发明的实施例提供一种具有能够检查磁头的简单结构的磁头检查系统。根据一个实施例，磁头检查系统包括检查模块，该检查模块设置有磁盘，其中记录有包括轨道标识符信息的伺服数据，主轴电机，具有安装结构的滑架，包含磁头的磁头组件音圈电机和主电路部分。检查电路部分指示主电路部分执行控制，以将磁头移动到特定的磁道，并通过磁头进行一定的读写操作，以检查磁头。

2. 发明授权

US07574046B2 Optimized lighting method for slider serial reading using class variance 失效
标题翻译：使用类方差的滑块串行读取的优化照明方法
公开(公告)号：US07574046B2
公开(公告)日：2009-08-11
申请号：US11303784
申请日：2005-12-15
申请人： Yohtaroh Ichimura , Shinichi Iwasa , Takayuki Erikawa , Yukihiro Nakamura
发明人： Yohtaroh Ichimura , Shinichi Iwasa , Takayuki Erikawa , Yukihiro Nakamura
IPC分类号： G06K9/00
CPC分类号： G06K9/2036
摘要： Embodiments of the invention provide a method for setting a light source parameter in order to recognize an identification mark on an object surface. In one embodiment, a grayscale image is generated by setting the light volume of the light source to a given value. Plural thresholds each for binarizing the grayscale image in density are set. The inter-class variance values to be produced respectively according to the thresholds are calculated and the largest inter-class variance value is selected as the peak inter-class variance value from the inter-class variance values calculated. The light volume is changed to a plurality of different values. Peak inter-class variance values are obtained respectively for the values and the largest peak inter-class variance value is selected as the maximum inter-class variance value from the peak inter-class variance values obtained. The object surface is irradiated by the light source whose light volume is set to a value which would give the maximum inter-class variance value.
摘要翻译：本发明的实施例提供了一种用于设置光源参数以便识别物体表面上的识别标记的方法。在一个实施例中，通过将光源的光量设置为给定值来生成灰度图像。设置用于将灰度图像二值化为密度的多个阈值。计算根据阈值分别产生的类间方差值，并且从所计算的类间方差值中选择最大类间方差值作为峰值类间方差值。光量变为多个不同的值。针对这些值分别获得峰值类间方差值，并且从获得的峰值类间方差值中选择最大峰值类间方差值作为最大类间方差值。物体表面被光源照射，其光量被设定为将给出最大类间方差值的值。

3. 发明申请

US20090052079A1 Magnetic head slider fabrication method, preamplifier and magnetic disk drive 审中-公开
标题翻译：磁头滑块制造方法，前置放大器和磁盘驱动器
公开(公告)号：US20090052079A1
公开(公告)日：2009-02-26
申请号：US11895323
申请日：2007-08-23
申请人： Shinichi Iwasa
发明人： Shinichi Iwasa
IPC分类号： G11B5/02 , H01F7/06
CPC分类号： G11B5/3166 , G11B5/102 , G11B5/3173 , G11B5/455 , Y10T29/4902
摘要： Embodiments of the present invention set the resistance value and resistance change of a magnetoresistive element as the comparison criteria of a tester without use of an actual magnetic head slider in an inspection process during fabrication of magnetic head sliders. According to one embodiment, at the time of default setting of a tester, an emulator is connected to a preamplifier of a magnetic characteristic measurement device. Signals which are obtained by emulating the resistance value and resistance change of the magnetoresistive element are inputted to the preamplifier from the emulator. The resistance value and resistance change serve as references. The output of the preamplifier is A/D converted to be inputted to the MPU. In the MPU, the A/D converted output is converted into a resistance value to be stored in the ROM. The tester uses the resistance value stored in the ROM as a reference to compare the measured resistance value of the magnetoresistive element therewith. Since the set reference value changes with time, the emulator is connected to the tester regularly for checking and adjusting the reference value.
摘要翻译：本发明的实施例在制造磁头滑块的检查过程中，将磁阻元件的电阻值和电阻变化设置为测试仪的比较标准，而不使用实际的磁头滑块。根据一个实施例，在测试器的默认设置时，仿真器连接到磁特性测量装置的前置放大器。通过仿真磁阻元件的电阻值和电阻变化而获得的信号从仿真器输入到前置放大器。电阻值和电阻变化作为参考。前置放大器的输出A / D转换为输入到MPU。在MPU中，将A / D转换的输出转换为要存储在ROM中的电阻值。测试器使用存储在ROM中的电阻值作为参考来比较磁阻元件的测量电阻值。由于设定的参考值随着时间的推移而变化，因此模拟器经常与测试仪连接，用于检查和调整参考值。

4. 发明申请

US20080204913A1 Magnetic head inspection system, magnetic head inspection method and magnetic disk drive manufacturing method 有权
标题翻译：磁头检测系统，磁头检测方法和磁盘驱动器制造方法
公开(公告)号：US20080204913A1
公开(公告)日：2008-08-28
申请号：US12072751
申请日：2008-02-27
申请人： Hiroshi Umezaki , Shinichi Iwasa
发明人： Hiroshi Umezaki , Shinichi Iwasa
IPC分类号： G11B27/36
CPC分类号： G11B5/455 , G11B27/36
摘要： Embodiments of the present invention provide a magnetic head inspection system having a simple configuration capable of inspecting magnetic heads. According to one embodiment, the magnetic head inspection system comprises an inspection module which is provided with a magnetic disk where servo data including track identifier information are recorded, a spindle motor, a carriage having a mount structure to which a head assembly containing a magnetic head is secured, a voice coil motor and a main circuit section. An inspection circuit section instructs the main circuit section to execute control so as to move the magnetic head to a specific track and perform a certain read write operation by the magnetic head in order to inspect the magnetic head.
摘要翻译：本发明的实施例提供一种具有能够检查磁头的简单结构的磁头检查系统。根据一个实施例，磁头检查系统包括检查模块，该检查模块设置有磁盘，其中记录有包括轨道标识符信息的伺服数据，主轴电机，具有安装结构的滑架，包含磁头的磁头组件音圈电机和主电路部分。检查电路部分指示主电路部分执行控制，以将磁头移动到特定的磁道，并通过磁头进行一定的读写操作，以检查磁头。

5. 发明申请

US20060126934A1 Optimized lighting method for slider serial reading using class variance 失效
公开(公告)号：US20060126934A1
公开(公告)日：2006-06-15
申请号：US11303784
申请日：2005-12-15
申请人： Yohtaroh Ichimura , Shinichi Iwasa , Takayuki Erikawa , Yukihiro Nakamura
发明人： Yohtaroh Ichimura , Shinichi Iwasa , Takayuki Erikawa , Yukihiro Nakamura
IPC分类号： G06K9/00 , G06K9/38
CPC分类号： G06K9/2036
摘要： Embodiments of the invention provide a method for setting a light source parameter in order to recognize an identification mark on an object surface. In one embodiment, a grayscale image is generated by setting the light volume of the light source to a given value. Plural thresholds each for binarizing the grayscale image in density are set. The inter-class variance values to be produced respectively according to the thresholds are calculated and the largest inter-class variance value is selected as the peak inter-class variance value from the inter-class variance values calculated. The light volume is changed to a plurality of different values. Peak inter-class variance values are obtained respectively for the values and the largest peak inter-class variance value is selected as the maximum inter-class variance value from the peak inter-class variance values obtained. The object surface is irradiated by the light source whose light volume is set to a value which would give the maximum inter-class variance value.

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