Invention Grant
- Patent Title: Magnetic recording medium having patterned auxiliary recording layer and method for manufacturing such magnetic recording medium
- Patent Title (中): 具有图案化辅助记录层的磁记录介质和用于制造这种磁记录介质的方法
-
Application No.: US12906414Application Date: 2010-10-18
-
Publication No.: US08367228B2Publication Date: 2013-02-05
- Inventor: Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
- Applicant: Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
- Applicant Address: SG Singapore
- Assignee: WD Media (Singapore) PTE. Ltd.
- Current Assignee: WD Media (Singapore) PTE. Ltd.
- Current Assignee Address: SG Singapore
- Priority: JP2006-262809 20060927
- Main IPC: G11B5/66
- IPC: G11B5/66

Abstract:
A method for manufacturing a magnetic recording medium for perpendicular magnetic recording includes the steps of forming a first magnetic layer which has magnetic crystal grains exhibiting perpendicular magnetic anisotropy and nonmagnetic substances for magnetically separating the magnetic crystal grains from each other at grain boundaries of the magnetic crystal grains, forming a second magnetic layer which has magnetic grains exchange-coupled to the magnetic crystal grains, a grain boundary width of the magnetic grains being smaller than a grain boundary width of the magnetic crystal grains, and forming separation regions which magnetically separate tracks from each other in regions between the tracks of the magnetic recording medium in at least the second magnetic layer. The separation regions are disposed substantially only in the second magnetic layer of the first magnetic layer and the second magnetic layer.
Public/Granted literature
- US20110039125A1 MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM Public/Granted day:2011-02-17
Information query
IPC分类: