发明授权
US08399051B1 Method for making a patterned perpendicular magnetic recording disk having a FePt or CoPt chemically ordered recording layer
有权
制造具有FePt或CoPt化学有序记录层的图案化垂直磁记录盘的方法
- 专利标题: Method for making a patterned perpendicular magnetic recording disk having a FePt or CoPt chemically ordered recording layer
- 专利标题(中): 制造具有FePt或CoPt化学有序记录层的图案化垂直磁记录盘的方法
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申请号: US13248086申请日: 2011-09-29
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公开(公告)号: US08399051B1公开(公告)日: 2013-03-19
- 发明人: Olav Hellwig , Jeffrey S. Lille , Andrew Thomas McCallum , Oleksandr Mosendz , Dieter K. Weller
- 申请人: Olav Hellwig , Jeffrey S. Lille , Andrew Thomas McCallum , Oleksandr Mosendz , Dieter K. Weller
- 申请人地址: NL Amsterdam
- 专利权人: HGST Netherlands B.V.
- 当前专利权人: HGST Netherlands B.V.
- 当前专利权人地址: NL Amsterdam
- 代理商 Thomas R. Berthold
- 主分类号: B05D5/12
- IPC分类号: B05D5/12
摘要:
A method for making a bit-patterned-media (BPM) magnetic recording disk includes depositing a FePt (or CoPt) alloy recording layer, and then depositing a sealing layer on the FePt layer before high-temperature annealing. The high-temperature annealing causes the FePt to become substantially chemically-ordered in the L10 phase. After annealing, the sealing layer is removed. The sealing layer prevents nanoclustering and agglomeration of the FePt material at the surface of the FePt layer and the sealing layer, which would result in undesirable high surface roughness of the FePt, making patterning of the FePt layer difficult. The FePt layer can be patterned into the discrete islands for the BPM disk either before deposition of the sealing layer or after deposition and removal of the sealing layer. After patterning and removal of the sealing layer, the disk protective overcoat is deposited over the discrete data islands.