发明申请
- 专利标题： Magnetic recording medium, method for producing thereof, and magnetic recording and reproducing apparatus
- 专利标题（中）： 磁记录介质，其制造方法以及磁记录和再现装置
-
申请号： US10552445申请日： 2004-04-07
-
公开(公告)号： US20060204791A1公开(公告)日： 2006-09-14
- 发明人: Akira Sakawaki , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
- 申请人： Akira Sakawaki , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
- 优先权： JP2003-103454 20030407; US60462298 20030414
- 国际申请： PCT/JP04/04994 WO 20040407
- 主分类号： G11B5/66
- IPC分类号： G11B5/66 ; B05D5/12
摘要：
A magnetic recording medium which is provided on a nonmagnetic substrate 1 with at least an orientation-controlling layer 3 for controlling the orientation of a layer formed directly thereon, a perpendicularly magnetic layer 4 having an easily magnetizing axis oriented mainly perpendicularly relative to the nonmagnetic substrate 1, and a protective layer 5 and characterized in that the perpendicularly magnetic layer 4 includes two or more magnetic layers, that at least one of the magnetic layers is a layer 4a having Co as a main component and containing Pt as well and containing an oxide and that at least another of the magnetic layers is a layer 4b having Co as a main component and containing Cr as well and containing no oxide.
公开/授权文献
信息查询
IPC分类:
