发明授权
US5772857A Method of manufacturing CoCrTa/CoCrTaPt bi-layer magnetic thin films 失效
CoCrTa / CoCrTaPt双层磁性薄膜的制造方法

  • 专利标题: Method of manufacturing CoCrTa/CoCrTaPt bi-layer magnetic thin films
  • 专利标题(中): CoCrTa / CoCrTaPt双层磁性薄膜的制造方法
  • 申请号: US608142
    申请日: 1996-02-28
  • 公开(公告)号: US5772857A
    公开(公告)日: 1998-06-30
  • 发明人: Bing Zhang
  • 申请人: Bing Zhang
  • 申请人地址: CA Scotts Valley
  • 专利权人: Seagate Technology, Inc.
  • 当前专利权人: Seagate Technology, Inc.
  • 当前专利权人地址: CA Scotts Valley
  • 主分类号: G11B5/66
  • IPC分类号: G11B5/66 G11B5/851 C23C14/34
Method of manufacturing CoCrTa/CoCrTaPt bi-layer magnetic thin films
摘要:
Double layer, or bi-layer, magnetic films are deposited over a substrate with an underlayer. The bi-layer film is a film of two different magnetic layers which have different chemical composition, deposited with no spacer layer between the two layers. The lower magnetic layer should be of a low noise magnetic material, while the upper magnetic layer should be a high coercivity magnetic material. The bi-layer film exhibits a single response to magnetic recording and a joint coercivity different from the coercivity of either layer by itself. A preferred double layer media uses a CoCrTa layer deposited under a CoCrTaPt layer, with the CoCrTa layer comprising 30 to 70% of the total film thickness. The double layer film produces magnetic media with higher coercivity and lower media noise as compared to single layered films of either of the materials of the magnetic layers.
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