发明授权
- 专利标题: Method for manufacturing a magnetic recording medium
- 专利标题(中): 磁记录介质的制造方法
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申请号: US09992540申请日: 2001-11-06
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公开(公告)号: US06826825B2公开(公告)日: 2004-12-07
- 发明人: Naoki Takizawa , Hiroyuki Uwazumi , Takahiro Shimizu , Tadaaki Oikawa
- 申请人: Naoki Takizawa , Hiroyuki Uwazumi , Takahiro Shimizu , Tadaaki Oikawa
- 优先权: JP2000-342486 20001109
- 主分类号: G11B5127
- IPC分类号: G11B5127
摘要:
A manufacturing method achieves excellent magnetic recording characteristics by sequentially sputtering a non-magnetic under-layer, a non-magnetic intermediate layer, and a magnetic layer on a non-magnetic substrate in an atmosphere of H2O partial pressure of 2×10−10 Torr or lower. This process allows beneficial deposition of the magnetic layer and reduces raw materials costs. The magnetic layer includes ferromagnetic grains and non-magnetic grain boundaries. The intermediate layer has a hexagonal close-packed crystal structure. The manufacturing method allows manufacture of a high quality magnetic recording medium without a heating step thereby allowing use of lower cost materials, reduces manufacturing time, and increases savings.
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