发明授权
- 专利标题: Perpendicular magnetic recording disk and manufacturing method thereof
- 专利标题(中): 垂直磁记录盘及其制造方法
-
申请号: US10576755申请日: 2005-06-29
-
公开(公告)号: US08603650B2公开(公告)日: 2013-12-10
- 发明人: Yoshiaki Sonobe , Teiichiro Umezawa , Chikara Takasu
- 申请人: Yoshiaki Sonobe , Teiichiro Umezawa , Chikara Takasu
- 申请人地址: SG Singapore
- 专利权人: WD Media (Singapore) Pte. Ltd.
- 当前专利权人: WD Media (Singapore) Pte. Ltd.
- 当前专利权人地址: SG Singapore
- 优先权: JP2004-194175 20040630
- 国际申请: PCT/JP2005/011926 WO 20050629
- 国际公布: WO2006/003922 WO 20060112
- 主分类号: G11B5/673
- IPC分类号: G11B5/673
摘要:
A magnetic disk 10 for use in perpendicular magnetic recording has at least a magnetic recording layer on a substrate 1. The magnetic recording layer is composed of a ferromagnetic layer 5 of a granular structure containing silicon (Si) or an oxide of silicon (Si) between crystal grains containing cobalt (Co), a stacked layer 7 having a first layer containing cobalt (Co) or a Co alloy and a second layer containing palladium (Pd) or platinum (Pt), and a spacer layer 6 interposed between the ferromagnetic layer 5 and the stacked layer 7. After forming the ferromagnetic layer 5 on the substrate 1 by sputtering in an argon gas atmosphere, the stacked layer 7 is formed by sputtering in the argon gas atmosphere at a gas pressure lower than that used when forming the ferromagnetic layer 5.