发明申请
- 专利标题: Magnetic recording medium, method of producing the same and magnetic recording and reproducing device
- 专利标题(中): 磁记录介质及其制造方法及磁记录再生装置
-
申请号: US11594769申请日: 2006-11-09
-
公开(公告)号: US20070111035A1公开(公告)日: 2007-05-17
- 发明人: Kenji Shimizu , Hiroshi Sakai , Takashi Hikosaka , Futoshi Nakamura
- 申请人: Kenji Shimizu , Hiroshi Sakai , Takashi Hikosaka , Futoshi Nakamura
- 专利权人: SHOWA DENKO K.K.,KABUSHIKI KAISHA TOSHIBA
- 当前专利权人: SHOWA DENKO K.K.,KABUSHIKI KAISHA TOSHIBA
- 优先权: JP2000-402774 20001228
- 主分类号: G11B5/66
- IPC分类号: G11B5/66
摘要:
The present invention aims to provide a magnetic recording medium, a method for producing the same, and a magnetic recording and reproducing device which can prevent spike noise and improve the error rate. The present invention provides a magnetic recording medium, a method for producing the same, and a magnetic recording and reproducing device comprising at least one nonmagnetic substrate, a soft magnetic underlayer 2, an orientation control layer to control the orientation of the layer formed directly above the same, and a perpendicular magnetic layer having an axis of easy magnetization which is oriented mainly perpendicularly to the nonmagnetic substrate, and the soft magnetic underlayer 2 is formed with a multilayer structure having soft magnetic layers 21A and 21B, and one or more separation layers 22 interposed between the soft magnetic layers, and at least one of the soft magnetic layers 21A and 21B comprises a material with a structure having no magnetic domain walls.