发明授权
- 专利标题: Magneto-optical recording medium and producing method thereof
- 专利标题(中): 磁光记录介质及其制造方法
-
申请号: US112930申请日: 1998-07-09
-
公开(公告)号: US5922177A公开(公告)日: 1999-07-13
- 发明人: Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Kenji Ohta
- 申请人: Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Kenji Ohta
- 申请人地址: JPX Osaka
- 专利权人: Sharp Kabushiki Kaisha
- 当前专利权人: Sharp Kabushiki Kaisha
- 当前专利权人地址: JPX Osaka
- 优先权: JPX6-249795 19941014
- 主分类号: C23C14/18
- IPC分类号: C23C14/18 ; C23C14/34 ; G11B7/26 ; G11B11/105 ; C23C14/00 ; C23C14/32
摘要:
A method to produce a magneto-optical recording medium which includes a readout layer having in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to a perpendicular magnetization when temperature rises, and a recording layer for storing information thereon magneto-optically. In the readout layer made of GdFeCo by adding Nd thereto, an amount of Nd to be added changes in a direction perpendicular to its film surface, and an amount of Nd is larger on a light incidence side than on the other side. As a result, even when a laser with a short wavelength is used, high density recording can be achieved as undesirable recording and reproducing operations due to a change in a magnetic interaction is prevented and also deterioration in quality of a reproducing signal is prevented.
公开/授权文献
- USD428954S Golf ball marker 公开/授权日:2000-08-01
信息查询
IPC分类: