Invention Grant
- Patent Title: Magnetic recording medium, recording and reproducing device, magnetic recording medium-magnetizing method, and magnetic recording medium-magnetizing device
- Patent Title (中): 磁记录介质,记录和再现装置,磁记录介质磁化方法和磁记录介质磁化装置
-
Application No.: US11965091Application Date: 2007-12-27
-
Publication No.: US07864485B2Publication Date: 2011-01-04
- Inventor: Tatsuhiro Kobayashi , Makoto Moriya
- Applicant: Tatsuhiro Kobayashi , Makoto Moriya
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2006-353625 20061228
- Main IPC: G11B5/596
- IPC: G11B5/596

Abstract:
A magnetic recording medium enhances the quality of a reproducing signal. The magnetic recording medium has a servo pattern formed in a servo pattern area on at least one surface of a disk-shaped substrate by a concave/convex pattern having convex portions (recording areas) and concave portions (non-recording areas), and a data track pattern formed by the concave/convex pattern in a data recording area on the at least one surface of the disk-shaped substrate. In a state where recording data is not recorded in the data recording area, the convex portions in the servo pattern area are DC-magnetized, and the convex portions in the data recording area are AC-magnetized.
Public/Granted literature
Information query
IPC分类: