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公开(公告)号：US07423825B2
公开(公告)日：2008-09-09
申请号：US11172199
申请日：2005-06-29
IPC分类号： G11B27/36
CPC分类号： G11B5/59605 , G11B5/56 , G11B27/36 , G11B2220/20
摘要： A disk unit is capable of detecting a track, the track width of which deviates from a normal value, with high accuracy at high speed. A HDD includes a read head, a disk and defective-track detecting part. The disk has servo data including bursts A, B written thereon. The servo data is used to position the read head to a track center. The defective-track detecting part detects a defective track as below. The sum of the amplitude of bursts A and B, which have been read by the read head by one read operation, is divided by the amplitude of a burst C or D to obtain a compared value. If the compared value deviates from a criterion by a specified percentage or more, it is judged that the track width of a track is abnormal. Since bursts A through D are written without trimming, the size of bursts A through D in the track width direction are kept constant regardless of the track width. Accordingly, a gap G fluctuating in accordance with the track width is formed in the radial direction between bursts A and B. Bursts A and B are read at a position including gap G, and the above-mentioned compared value is determined, and thereby a defective track is detected.
摘要翻译： 磁盘单元能够以高速度高精度地检测轨道宽度偏离正常值的轨道。 HDD包括读取头，盘和缺陷轨迹检测部。 磁盘具有写入其上的脉冲串A，B的伺服数据。 伺服数据用于将读取头定位到轨道中心。 缺陷轨迹检测部分检测如下的缺陷轨迹。 由读取头通过一次读取操作读取的脉冲串A和B的幅度之和除以突发C或D的幅度以获得比较值。 如果比较值与标准偏差达指定百分比以上，则判断轨道的轨迹宽度异常。 由于脉冲串A至D在不进行调整的情况下被写入，所以在轨道宽度方向上的脉冲串A至D的大小与轨道宽度无关。 因此，在突发A和B之间沿径向方向形成根据磁道宽度波动的间隙G.在包括间隙G的位置处读取突发A和B，并且确定上述比较值，由此 检测到有缺陷的轨迹。
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公开(公告)号：US07271974B2
公开(公告)日：2007-09-18
申请号：US11191446
申请日：2005-07-27
CPC分类号： G11B5/59666 , G11B5/59633 , G11B33/1446 , G11B33/148 , Y10T29/49025
摘要： Embodiments of the invention provide a disk device capable of writing highly accurate servo data using an extremely simple technique, and a manufacturing method therefor. According to one embodiment, a method for manufacturing a disk device includes: mounting a magnetic disk and each assembly for driving the magnetic disk, such as an SPM and a VCM, in a base and attaching a top cover so as to seal the enclosure (made up of the base and the top cover) with each assembly of the HDD therein; replacing the air within the hard disk assembly (HDA) with a gas having a lower density than air, such as He; writing servo data to the magnetic disk in a self servo track write operation; and replacing the gas within the HDA with air.
摘要翻译： 本发明的实施例提供一种能够使用非常简单的技术来写入高精度伺服数据的盘装置及其制造方法。 根据一个实施例，一种用于制造盘装置的方法包括：在基座中安装用于驱动诸如SPM和VCM的磁盘的磁盘和每个组件，并附接顶盖以密封外壳（ 由基座和顶盖构成），其中的HDD的每个组件; 用密度比密度低的气体（如He）代替硬盘组件（HDA）中的空气; 在自伺服磁道写入操作中将伺服数据写入磁盘; 并用空气替代HDA内的气体。
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公开(公告)号：US20070253095A1
公开(公告)日：2007-11-01
申请号：US11796516
申请日：2007-04-26
CPC分类号： G11B5/024 , G11B5/59666
摘要： Embodiments in accordance with the present invention control pitch variations that are not observed in self servo write (SSW). According to one embodiment of the present invention, an outer radius side area of a magnetic disk is erased using an external magnetic field, and an inner radius side area is subjected to self erase using a head. The magnetization state in the base of the inner radius side area is different from that of the outer radius side area before pattern writing. Therefore, in the inner radius side area and the outer radius side area, even if a radial pattern of the same pitch is read, the different APCs are measured. With SSW of this embodiment, a reference APC used in the inner radius side area is different from that used in the outer radius side area. In this manner, the pitch variation is prevented.
摘要翻译： 根据本发明的实施例控制在自伺服写入（SSW）中未观察到的音调变化。 根据本发明的一个实施例，使用外部磁场擦除磁盘的外半径侧区域，并且使用磁头对内半径侧区域进行自擦除。 在内部半径侧区域的基部中的磁化状态与图案写入之前的外半径侧区域的磁化状态不同。 因此，在内半径侧区域和外半径侧区域中，即使读取了相同节距的径向图案，也测量不同的APC。 在本实施方式的SSW中，内径侧区域使用的基准APC与外径侧区域不同。 以这种方式，可以防止间距变化。
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公开(公告)号：US20070247742A1
公开(公告)日：2007-10-25
申请号：US11788510
申请日：2007-04-19
CPC分类号： G11B5/59633 , G11B5/59666
摘要： Embodiments in accordance with the present invention ensure that the pitch of a servo write track is accurately controlled. According to one embodiment of the present invention, a Self Servo Write (SSW) uses different methods and sequences to identify read-write offsets (RWOs) and calculate target positions in inner and outer diameter sides of a magnetic disk. In the inner diameter-side area, the SSW controller uses the readout of a radial pattern written on a recording surface and a reference value to identify the RWO. The SSW controller uses the RWO value identified in the inner diameter-side area to anticipate an RWO value in the outer diameter-side area. In the outer diameter-side area, the SSW controller uses the anticipated RWO value to determine the target position of each servo write track.
摘要翻译： 根据本发明的实施例确保伺服写入磁道的音调被精确地控制。 根据本发明的一个实施例，自动伺服写入（SSW）使用不同的方法和序列来识别读写偏移（RWO）并计算磁盘的内径和外径侧的目标位置。 在内径侧区域中，SSW控制器使用写在记录表面上的径向图案的读出和参考值来识别RWO。 SSW控制器使用在内径侧区域中识别的RWO值来预测外径侧区域中的RWO值。 在外径侧区域中，SSW控制器使用预期的RWO值来确定每个伺服写入轨迹的目标位置。
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公开(公告)号：US20060023339A1
公开(公告)日：2006-02-02
申请号：US11191446
申请日：2005-07-27
CPC分类号： G11B5/59666 , G11B5/59633 , G11B33/1446 , G11B33/148 , Y10T29/49025
摘要： Embodiments of the invention provide a disk device capable of writing highly accurate servo data using an extremely simple technique, and a manufacturing method therefor. According to one embodiment, a method for manufacturing a disk device includes: mounting a magnetic disk and each assembly for driving the magnetic disk, such as an SPM and a VCM, in a base and attaching a top cover so as to seal the enclosure (made up of the base and the top cover) with each assembly of the HDD therein; replacing the air within the hard disk assembly (HDA) with a gas having a lower density than air, such as He; writing servo data to the magnetic disk in a self servo track write operation; and replacing the gas within the HDA with air.
摘要翻译： 本发明的实施例提供一种能够使用非常简单的技术来写入高精度伺服数据的盘装置及其制造方法。 根据一个实施例，一种用于制造盘装置的方法包括：在基座中安装用于驱动诸如SPM和VCM的磁盘的磁盘和每个组件，并附接顶盖以密封外壳（ 由基座和顶盖构成），其中的HDD的每个组件; 用密度比密度低的气体（如He）代替硬盘组件（HDA）中的空气; 在自伺服磁道写入操作中将伺服数据写入磁盘; 并用空气替代HDA内的气体。
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公开(公告)号：US20050286156A1
公开(公告)日：2005-12-29
申请号：US11172199
申请日：2005-06-29
CPC分类号： G11B5/59605 , G11B5/56 , G11B27/36 , G11B2220/20
摘要： A disk unit is capable of detecting a track, the track width of which deviates from a normal value, with high accuracy at high speed. A HDD includes a read head, a disk and defective-track detecting part. The disk has servo data including bursts A, B written thereon. The servo data is used to position the read head to a track center. The defective-track detecting part detects a defective track as below. The sum of the amplitude of bursts A and B, which have been read by the read head by one read operation, is divided by the amplitude of a burst C or D to obtain a compared value. If the compared value deviates from a criterion by a specified percentage or more, it is judged that the track width of a track is abnormal. Since bursts A through D are written without trimming, the size of bursts A through D in the track width direction are kept constant regardless of the track width. Accordingly, a gap G fluctuating in accordance with the track width is formed in the radial direction between bursts A and B. Bursts A and B are read at a position including gap G, and the above-mentioned compared value is determined, and thereby a defective track is detected.
摘要翻译： 磁盘单元能够以高速度高精度地检测轨道宽度偏离正常值的轨道。 HDD包括读取头，盘和缺陷轨迹检测部。 磁盘具有写入其上的脉冲串A，B的伺服数据。 伺服数据用于将读取头定位到轨道中心。 缺陷轨迹检测部分检测如下的缺陷轨迹。 由读取头通过一次读取操作读取的脉冲串A和B的幅度之和除以突发C或D的幅度以获得比较值。 如果比较值与标准偏差达指定百分比以上，则判断轨道的轨迹宽度异常。 由于脉冲串A至D在不进行调整的情况下被写入，所以在轨道宽度方向上的脉冲串A至D的大小与轨道宽度无关。 因此，在突发A和B之间沿径向方向形成根据磁道宽度波动的间隙G.在包括间隙G的位置处读取突发A和B，并且确定上述比较值，由此 检测到有缺陷的轨迹。
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公开(公告)号：US20070046286A1
公开(公告)日：2007-03-01
申请号：US11515268
申请日：2006-09-01
IPC分类号： G01R33/12
CPC分类号： G11B5/012 , G11B5/455 , G11B5/4555 , G11B2005/001
摘要： Embodiments of the invention provide an inexpensive magnetic head tester employing component parts of a production HDD and capable of exercising functions very close to those of a production HDD. In one embodiment, a magnetic head tester employs the VCM actuator and the control circuit of a production HDD and has a lightweight, simple HGA fixing mechanism mounted on an actuator arm. The HGA fixing mechanism fixes an HGA to the actuator arm by a method using a very light holding spring mounted on the arm, a method of mechanically clamping an HGA by using air pressure, or a method of fixing an HGA to the arm by elastically deforming a rubber clamping member by air pressure. Servo control is achieved by the actuator of a production VCM. An end part of the VCM actuator is stopped by a stopping mechanism and is held by a holding spring to prevent the runaway of the VCM actuator. Servo control is performed by balancing the driving force of the VCM and the resilience of the spring.
摘要翻译： 本发明的实施例提供了一种廉价的磁头测试仪，其使用生产HDD的组件并且能够执行与生产HDD的功能非常接近的功能。 在一个实施例中，磁头测试仪使用VCM致动器和制造HDD的控制电路，并且具有安装在致动器臂上的重量轻，简单的HGA固定机构。 HGA固定机构通过使用安装在臂上的非常轻的保持弹簧的方法将HGA固定到致动器臂，使用空气压力机械地夹持HGA的方法，或通过弹性变形将HGA固定到臂的方法 通过空气压力的橡胶夹紧构件。 通过生产VCM的执行器实现伺服控制。 VCM致动器的端部由止动机构阻止，并由保持弹簧保持，以防止VCM致动器的失控。 通过平衡VCM的驱动力和弹簧的弹性来进行伺服控制。
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公开(公告)号：US07573669B2
公开(公告)日：2009-08-11
申请号：US11788510
申请日：2007-04-19
CPC分类号： G11B5/59633 , G11B5/59666
摘要： Embodiments in accordance with the present invention ensure that the pitch of a servo write track is accurately controlled. According to one embodiment of the present invention, a Self Servo Write (SSW) uses different methods and sequences to identify read-write offsets (RWOs) and calculate target positions in inner and outer diameter sides of a magnetic disk. In the inner diameter-side area, the SSW controller uses the readout of a radial pattern written on a recording surface and a reference value to identify the RWO. The SSW controller uses the RWO value identified in the inner diameter-side area to anticipate an RWO value in the outer diameter-side area. In the outer diameter-side area, the SSW controller uses the anticipated RWO value to determine the target position of each servo write track.
摘要翻译： 根据本发明的实施例确保伺服写入磁道的音调被精确地控制。 根据本发明的一个实施例，自动伺服写入（SSW）使用不同的方法和序列来识别读写偏移（RWO）并计算磁盘的内径和外径侧的目标位置。 在内径侧区域中，SSW控制器使用写在记录表面上的径向图案的读出和参考值来识别RWO。 SSW控制器使用在内径侧区域中识别的RWO值来预测外径侧区域中的RWO值。 在外径侧区域中，SSW控制器使用预期的RWO值来确定每个伺服写入轨迹的目标位置。
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公开(公告)号：US07518814B2
公开(公告)日：2009-04-14
申请号：US11515268
申请日：2006-09-01
IPC分类号： G11B27/36
CPC分类号： G11B5/012 , G11B5/455 , G11B5/4555 , G11B2005/001
摘要： Embodiments of the invention provide an inexpensive magnetic head tester employing component parts of a production HDD and capable of exercising functions very close to those of a production HDD. In one embodiment, a magnetic head tester employs the VCM actuator and the control circuit of a production HDD and has a lightweight, simple HGA fixing mechanism mounted on an actuator arm. The HGA fixing mechanism fixes an HGA to the actuator arm by a method using a very light holding spring mounted on the arm, a method of mechanically clamping an HGA by using air pressure, or a method of fixing an HGA to the arm by elastically deforming a rubber clamping member by air pressure. Servo control is achieved by the actuator of a production VCM. An end part of the VCM actuator is stopped by a stopping mechanism and is held by a holding spring to prevent the runaway of the VCM actuator. Servo control is performed by balancing the driving force of the VCM and the resilience of the spring.
摘要翻译： 本发明的实施例提供了一种廉价的磁头测试仪，其使用生产HDD的组件并且能够执行与生产HDD的功能非常接近的功能。 在一个实施例中，磁头测试仪使用VCM致动器和制造HDD的控制电路，并且具有安装在致动器臂上的重量轻，简单的HGA固定机构。 HGA固定机构通过使用安装在臂上的非常轻的保持弹簧的方法将HGA固定到致动器臂，使用空气压力机械地夹持HGA的方法，或通过弹性变形将HGA固定到臂的方法 通过空气压力的橡胶夹紧构件。 通过生产VCM的执行器实现伺服控制。 VCM致动器的端部由止动机构阻止，并由保持弹簧保持，以防止VCM致动器的失控。 通过平衡VCM的驱动力和弹簧的弹性来进行伺服控制。
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