Invention Grant
- Patent Title: Embedded servo on track for bit-patterned device
- Patent Title (中): 嵌入式伺服轨道上的位图案设备
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Application No.: US12202570Application Date: 2008-09-02
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Publication No.: US08154813B2Publication Date: 2012-04-10
- Inventor: Dieter Klaus Weller , Hans Jurgen Richter , David S. Kuo , Kim Yang Lee
- Applicant: Dieter Klaus Weller , Hans Jurgen Richter , David S. Kuo , Kim Yang Lee
- Applicant Address: US CA Cupertino
- Assignee: Seagate Technology, LLC
- Current Assignee: Seagate Technology, LLC
- Current Assignee Address: US CA Cupertino
- Agency: Ladas & Parry, LLP
- Main IPC: G11B5/02
- IPC: G11B5/02 ; G11B5/596

Abstract:
A method of making a disc for a computer disc drive and a disc made in accordance with the same. The disc includes a deposited magnetic layer of a thin film medium over a disc-shaped substrate. A master pattern having a plurality of tracks is recorded on the disc. Each track on the disc includes a plurality of magnetic islands, each having a size and magnetic properties. The size and/or magnetic properties of one or more of the magnetic islands of each track are modulated such that each track has a modulation frequency, so as to imprint a magnetic topology on the disc. The modulation frequency of each track is either a fundamental frequency or an overtone of the fundamental frequency.
Public/Granted literature
- US20100053809A1 EMBEDDED SERVO ON TRACK FOR BIT-PATTERNED MEDIA (BPM) Public/Granted day:2010-03-04
Information query
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