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1. 发明授权

US07242551B2 Method for inspecting track pitch in a magnetic disk 失效
标题翻译：检查磁盘轨道间距的方法
公开(公告)号：US07242551B2
公开(公告)日：2007-07-10
申请号：US11193942
申请日：2005-07-28
申请人： Shuhsuke Kurihara , Kenji Ogasawara , Yuhji Takagi , Hiroshi Uchiike
发明人： Shuhsuke Kurihara , Kenji Ogasawara , Yuhji Takagi , Hiroshi Uchiike
IPC分类号： G11B21/02 , G11B5/596
CPC分类号： G11B5/553 , G11B5/59633
摘要： Embodiments of the invention provide techniques to inspect the track pitch of a magnetic disk. In one embodiment, the track pitch is inspected using the servo information that was written onto the magnetic disk. A PES gain is set to be PG0. A head is moved to a position K near the position where control is to switch between MPES and SPES, and then MPES and SPES are calculated using reproduced burst signals and PG0. The quantity of change in the inspection HSP which is a half-servo pitch of an inspection-related burst pattern, with respect to an ideal half-servo pitch, is detected by calculating PESΔ, the difference between the MPES and SPES at position K. The track pitch is thus judged whether it is abnormal.
摘要翻译：本发明的实施例提供了检查磁盘的磁道间距的技术。在一个实施例中，使用写入磁盘的伺服信息来检查轨道间距。 PES增益被设置为PG0。头部移动到控制在MPES和SPES之间切换的位置附近的位置K，然后使用再现的脉冲串信号和PG0计算MPES和SPES。变化量通过计算PESDelta（位置K处的MPES和SPES之间的差）来检测作为相对于理想半伺服间距的与检查相关的突发图案的半伺服间距的检查HSP。轨迹间距是从而判断是否异常。

2. 发明申请

US20060023344A1 Method for inspecting track pitch in a magnetic disk 失效
标题翻译：检查磁盘轨道间距的方法
公开(公告)号：US20060023344A1
公开(公告)日：2006-02-02
申请号：US11193942
申请日：2005-07-28
申请人： Shuhsuke Kurihara , Kenji Ogasawara , Yuhji Takagi , Hiroshi Uchiike
发明人： Shuhsuke Kurihara , Kenji Ogasawara , Yuhji Takagi , Hiroshi Uchiike
IPC分类号： G11B5/596 , G11B21/02
CPC分类号： G11B5/553 , G11B5/59633
摘要： Embodiments of the invention provide techniques to inspect the track pitch of a magnetic disk. In one embodiment, the track pitch is inspected using the servo information that was written onto the magnetic disk. A PES gain is set to be PG0. A head is moved to a position K near the position where control is to switch between MPES and SPES, and then MPES and SPES are calculated using reproduced burst signals and PG0. The quantity of change in the inspection HSP which is a half-servo pitch of an inspection-related burst pattern, with respect to an ideal half-servo pitch, is detected by calculating PESΔ, the difference between the MPES and SPES at position K. The track pitch is thus judged whether it is abnormal.
摘要翻译：本发明的实施例提供了检查磁盘的磁道间距的技术。在一个实施例中，使用写入磁盘的伺服信息来检查轨道间距。 PES增益被设置为PG0。头部移动到控制在MPES和SPES之间切换的位置附近的位置K，然后使用再现的脉冲串信号和PG0计算MPES和SPES。变化量通过计算PESDelta（位置K处的MPES和SPES之间的差）来检测作为相对于理想半伺服间距的与检查相关的突发图案的半伺服间距的检查HSP。轨迹间距是从而判断是否异常。

3. 发明申请

US20060126206A1 Method of writing servo data and magnetic disk drive 审中-公开
标题翻译：写入伺服数据和磁盘驱动器的方法
公开(公告)号：US20060126206A1
公开(公告)日：2006-06-15
申请号：US11285911
申请日：2005-11-23
申请人： Yuhji Takagi , Hiroshi Uchiike
发明人： Yuhji Takagi , Hiroshi Uchiike
IPC分类号： G11B5/09 , G11B21/02
CPC分类号： G11B5/59633 , G11B5/012 , G11B5/59638 , G11B5/59688 , G11B5/6005 , G11B5/6029 , G11B2005/0018
摘要： Servo data is stably written even if the flying height of a head/slider is varied. In one embodiment, a seamed pattern of servo data is written by a write head that is equipped in a head/slider. A variation pattern signal of the flying height in the circumferential direction of a magnetic disk is generated. The write head is located at a given position of the magnetic disk. The seamed pattern is written while controlling a recording current to flow in the write head on the basis of the variation pattern. At a constant recording current, a pattern length L1 is shortened when a flying height H1 is higher, and a pattern length L2 is lengthened when a flying height H2 is lower. The magnitude of the recording current is controlled according to the variation of the flying height, thereby making it possible to fall a pattern length L within a constant range, and accurately define the position of an edge of the seamed pattern.
摘要翻译：即使头/滑块的飞行高度变化，也能够稳定地写入伺服数据。在一个实施例中，伺服数据的缝合图案由配备在头/滑块中的写头写入。产生磁盘圆周方向的飞行高度的变化模式信号。写头位于磁盘的给定位置。在根据变化图案控制记录电流在写入头中流动时，写入缝合图案。在恒定的记录电流下，当飞行高度H 1较高时，图案长度L 1缩短，并且当飞行高度H 2较低时，图案长度L 2被延长。根据飞行高度的变化来控制记录电流的大小，从而可以将图案长度L落在一定范围内，并且精确地限定缝合图案的边缘的位置。

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