公开(公告)号：US20080072692A1

公开(公告)日：2008-03-27

申请号：US11900708

申请日：2007-09-12

申请人： Yoshiaki Uji ,  Fujio Harako ,  Minoru Shimada ,  Ryoh Miura

发明人： Yoshiaki Uji ,  Fujio Harako ,  Minoru Shimada ,  Ryoh Miura

IPC分类号： G01M19/00

CPC分类号： G01M99/002 ,  G01R33/1207

摘要： Embodiments of the present invention efficiently conduct a test for detecting defects on a magnetic disk more accurately. According to one embodiment, a HDD carries out defect inspection of a magnetic disk using thermal fly height control (TFC). Changing a clearance by the TFC achieves defect inspection tests under varied test conditions without much decrease of throughput in manufacturing HDDs. First, a self analysis test (SAT) is carried out in a state that a heater power of P2 is supplied to a heater. Then, another SAT is carried out in a state that a heater power of P1 is supplied to the heater. The heater power P2 is larger than the heater power P1.

摘要翻译： 本发明的实施例更有效地进行用于检测磁盘上的缺陷的测试。 根据一个实施例，HDD使用热飞跃高度控制（TFC）执行磁盘的缺陷检查。 通过TFC改变间隙，在不同的测试条件下实现缺陷检测测试，而不会大大降低制造HDD的吞吐量。 首先，在将加热器功率P 2提供给加热器的状态下进行自我分析测试（SAT）。 然后，在将加热器功率P 1提供给加热器的状态下进行另一SAT。 加热器功率P 2大于加热器功率P 1。

公开(公告)号：US5754355A

公开(公告)日：1998-05-19

申请号：US633596

申请日：1996-04-17

申请人： Takashi Nakamura ,  Isao Yoneda ,  Yuji Yokoe ,  Kazushi Tsuwako ,  Fujio Harako ,  Katsumi Suda ,  Michio Nakajima ,  Kenji Ogasawara

发明人： Takashi Nakamura ,  Isao Yoneda ,  Yuji Yokoe ,  Kazushi Tsuwako ,  Fujio Harako ,  Katsumi Suda ,  Michio Nakajima ,  Kenji Ogasawara

IPC分类号： G11B5/00 ,  G11B5/60 ,  G11B19/04 ,  G11B19/20 ,  G11B23/50 ,  G11B15/46

CPC分类号： G11B5/6005 ,  G11B19/04 ,  G11B19/20 ,  G11B23/505 ,  G11B2005/0016

摘要： A disk drive apparatus and read error recovery method in a disk drive apparatus removes thermal asperities on disk surfaces. A projection, such as a thermal asperity, on the recording surfaces of disks is detected when a signal transducer head contacts the projection. The flying height of the signal transducer head is lowered, e.g., by changing the disk rotation speed from the normal rotation speed in read/write operations or by heating a suspension having a bimetal element, while the signal transducer head is positioned over the detected projection on the track. The signal transducer head strikes the projection to break the projection. This avoids a subsequent error from being caused by the thermal asperity.

摘要翻译： 磁盘驱动装置中的磁盘驱动装置和读取错误恢复方法去除磁盘表面上的热凹凸。 当信号传感器头接触投影时，检测到盘的记录表面上的诸如热不均匀性的投影。 信号传感器头的飞行高度例如通过在读/写操作中通过将盘旋转速度从正常旋转速度改变或通过加热具有双金属元件的悬架而降低，同时信号传感器头位于检测到的投影上方 在轨道上。 信号传感器头撞击突起以断开突起。 这避免了由于热不平坦造成的后续错误。

公开(公告)号：US07636217B2

公开(公告)日：2009-12-22

申请号：US11900708

申请日：2007-09-12

申请人： Yoshiaki Uji ,  Fujio Harako ,  Minoru Shimada ,  Ryoh Miura

发明人： Yoshiaki Uji ,  Fujio Harako ,  Minoru Shimada ,  Ryoh Miura

IPC分类号： G11B5/09

CPC分类号： G01M99/002 ,  G01R33/1207

摘要： Embodiments of the present invention efficiently conduct a test for detecting defects on a magnetic disk more accurately. According to one embodiment, a HDD carries out defect inspection of a magnetic disk using thermal fly height control (TFC). Changing a clearance by the TFC achieves defect inspection tests under varied test conditions without much decrease of throughput in manufacturing HDDs. First, a self analysis test (SAT) is carried out in a state that a heater power of P2 is supplied to a heater. Then, another SAT is carried out in a state that a heater power of P1 is supplied to the heater. The heater power P2 is larger than the heater power P1.

摘要翻译： 本发明的实施例更有效地进行用于检测磁盘上的缺陷的测试。 根据一个实施例，HDD使用热飞跃高度控制（TFC）执行磁盘的缺陷检查。 通过TFC改变间隙，在不同的测试条件下实现缺陷检测测试，而不会大大降低制造HDD的吞吐量。 首先，在将加热器功率P2提供给加热器的状态下进行自我分析测试（SAT）。 然后，在将加热器功率P1提供给加热器的状态下进行另一SAT。 加热器功率P2大于加热器功率P1。

公开(公告)号：US5696643A

公开(公告)日：1997-12-09

申请号：US632787

申请日：1996-04-17

申请人： Kazushi Tsuwako ,  Fujio Harako ,  Katsumi Suda ,  Michio Nakajima ,  Isao Yoneda ,  Kenji Ogasawara

发明人： Kazushi Tsuwako ,  Fujio Harako ,  Katsumi Suda ,  Michio Nakajima ,  Isao Yoneda ,  Kenji Ogasawara

IPC分类号： G11B5/60 ,  G11B19/04 ,  G11B19/20 ,  G11B23/50 ,  G11B15/46

CPC分类号： G11B5/6005 ,  G11B19/04 ,  G11B19/20 ,  G11B23/505

摘要： A disk drive apparatus and read error recovery method in a disk drive apparatus removes thermal asperities on disk surfaces. A projection, such as a thermal asperity, on the recording surfaces of disks is detected when a signal transducer contacts the projection. The flying height of the signal transducer is lowered, e.g., by reducing the disk rotation speed from the normal rotation speed in read/write operations, while the signal transducer is positioned over the detected projection on the track. The signal transducer strikes the projection to break the projection. This avoids a subsequent error from being caused by the thermal asperity.

摘要翻译： 磁盘驱动装置中的磁盘驱动装置和读取错误恢复方法去除磁盘表面上的热凹凸。 当信号传感器接触投影时，检测在盘的记录表面上的诸如热不均匀性的投影。 信号传感器的飞行高度例如通过在读/写操作中将盘旋转速度从正常旋转速度减小而信号换能器位于轨道上检测到的投影上方。 信号传感器撞击投影以断开投影。 这避免了由热不均匀引起的后续错误。

公开(公告)号：US06362936B1

公开(公告)日：2002-03-26

申请号：US09254572

申请日：1999-03-04

申请人： Hiroo Inoue ,  Keishi Takahashi ,  Hiroshi Matsuda ,  Fujio Harako

发明人： Hiroo Inoue ,  Keishi Takahashi ,  Hiroshi Matsuda ,  Fujio Harako

IPC分类号： G11B2116

摘要： A head support assembly for a disk drive is comprised of a head suspension assembly connected to an actuator arm at one end and supporting a head at the other end, wherein a projection is formed on a flexure closely fixed on a thin-plate load beam, said projection projecting toward a disk surface and having a smooth surface. The projection is formed at a region somewhat close to the head supporting end from the hinge portion of the load beam. When shock is applied to the disk drive, bending occurs around the hinge portion of the load beam. During such bending, the projection having a smooth round surface is caused to contact the disk, whereby the disk surface is prevented from being damaged.