Invention Grant
- Patent Title: Magnetic recording medium, servo signal recording apparatus and method of producing magnetic recording medium
- Patent Title (中): 磁记录介质，伺服信号记录装置及磁记录介质的制造方法
-
Application No.: US14206709Application Date: 2014-03-12
-
Publication No.: US09001455B2Publication Date: 2015-04-07
- Inventor: Eiji Nakashio , Hiroshi Morita , Kiyoyuki Miyata
- Applicant: Sony Corporation
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JP2013-053586 20130315; JP2014-040945 20140303
- Main IPC: G11B5/584
- IPC: G11B5/584 ; G11B5/78 ; G11B5/008
Abstract:
There is provided a magnetic recording medium including a magnetic layer. The magnetic layer has a servo signal recorded thereon by magnetizing a part of the magnetic layer in a first direction. The first direction contains a component of a perpendicular direction that is perpendicular to a top surface of the magnetic layer. The magnetic layer is pre-magnetized in a second direction before recording of the servo signal. The second direction contains the component of the perpendicular direction. The second direction is opposite to the first direction.
Public/Granted literature
Information query
IPC分类:
