Invention Grant
US07342735B2 Method of writing patterns onto a recording disk, and data storage device
失效
将图案写入记录盘的方法以及数据存储装置
- Patent Title: Method of writing patterns onto a recording disk, and data storage device
- Patent Title (中): 将图案写入记录盘的方法以及数据存储装置
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Application No.: US11223481Application Date: 2005-09-08
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Publication No.: US07342735B2Publication Date: 2008-03-11
- Inventor: Minoru Hashimoto , Kenji Okada , Fuminori Sai , Satoshi Yamamoto
- Applicant: Minoru Hashimoto , Kenji Okada , Fuminori Sai , Satoshi Yamamoto
- Applicant Address: NL
- Assignee: Hitachi Global Storage Technologies
- Current Assignee: Hitachi Global Storage Technologies
- Current Assignee Address: NL
- Agency: Townsend and Townsend and Crew LLP
- Priority: JP2004-267532 20040914
- Main IPC: G11B21/02
- IPC: G11B21/02

Abstract:
Embodiments of the invention relate to writing servo patterns having aligned phases onto a recording disk in a process to write the servo patterns onto the disk. In one embodiment, time aligned patterns are written onto a magnetic disk on the basis of time intervals between base patterns with timings aligned to each other throughout tracks on the disk. The time aligned patterns are written onto typically servo tracks at time intervals Ts with aligned timings. Then, on the basis of these time aligned patterns, product servo patterns are written onto the disk. A time aligned pattern is written onto the disk after the lapse of a predetermined write time period since detection of a base pattern corresponding to the time aligned pattern. The write time period is determined on the basis of time intervals between base patterns on adjacent tracks.
Public/Granted literature
- US20060056098A1 Method of writing patterns onto a recording disk, and data storage device Public/Granted day:2006-03-16
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