Invention Grant
- Patent Title: Magnetic disk drive and microwave assisted recording method
- Patent Title (中): 磁盘驱动器和微波辅助记录方法
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Application No.: US13402957Application Date: 2012-02-23
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Publication No.: US08643967B2Publication Date: 2014-02-04
- Inventor: Hiroyuki Katada , Yasutaka Nishida , Masato Shiimoto
- Applicant: Hiroyuki Katada , Yasutaka Nishida , Masato Shiimoto
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2011-186450 20110829
- Main IPC: G11B27/36
- IPC: G11B27/36 ; G11B5/09
Abstract:
The present invention enhances reliability by correcting a write error due to unstable oscillation of a spin torque oscillator. In the present invention, a resistance value of a spin torque oscillator is monitored to detect that oscillation becomes unstable during recording. When a measured resistance value is out of a predefined normal range, information for which the recording operation is already performed is rewritten.
Public/Granted literature
- US20130050865A1 MAGNETIC DISK DRIVE AND MICROWAVE ASSISTED RECORDING METHOD Public/Granted day:2013-02-28
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