Invention Grant
- Patent Title: Patterned media with an alternating series of concentric servo zones and overlap zones
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Application No.: US13177396Application Date: 2011-07-06
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Publication No.: US08625219B2Publication Date: 2014-01-07
- Inventor: Keiichiro Nonaka , Kei Yasuna , Masahito Kobayashi
- Applicant: Keiichiro Nonaka , Kei Yasuna , Masahito Kobayashi
- Applicant Address: NL Amsterdam
- Assignee: HGST Netherlands B.V.
- Current Assignee: HGST Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Duft Bornsen Fettig LLP
- Main IPC: G11B5/09
- IPC: G11B5/09 ; G11B5/596

Abstract:
Embodiments described herein provide for patterned media concentric zones with an alternating series of concentric servo zones and overlap zones. The overlap zones facilitate the writing of servo data between servo zones of different servo frequency. The overlap zones may be dual frequency zones. The dual frequency zones have a first set of overlap patterns with the substantially identical pattern as the bordering lower frequency servo zone and a second set of overlap patterns with the substantially identical pattern as the bordering higher frequency servo zone. A bootstrap zone can be included near the inner diameter to assist initial servo writing. Alternatively the overlap zones are bootstrap zones. Such bootstrap zones have both bootstrap patterns and overlap patterns, the overlap patterns have the substantially identical pattern as a bordering servo zone. Bootstrap patterns only require DC magnetization for servo operability.
Public/Granted literature
- US20130010382A1 PATTERNED MEDIA WITH AN ALTERNATING SERIES OF CONCENTRIC SERVO ZONES AND OVERLAP ZONES Public/Granted day:2013-01-10
Information query
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