发明名称 |
High performance thin film disk containing an aita or aiti pre-seed layer, a cocr onset layer and a cocrptb magnetic layer |
摘要 |
The thin film disk includes a pre-seed layer of amorphous or nanocrystalline structure which may be AlTi or AlTa, and that is deposited upon a disk substrate. The pre-seed layer is followed by the RuAl seed layer, a Cr alloy underlayer, an onset layer composed essentially of CoCr and a magnetic layer. The onset layer has an optimal concentration of 28-33 at. % Cr and an optimal thickness of 0.5 to 2.5 nm and it increases coercivity and improves the Signal-to-Noise Ratio (SNR) of the disk. The magnetic layer is comprised of CoPtxCrBy, wherein x is the at. % concentration of Pt, y is the at. % concentration of boron, and x>4+y.
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申请公布号 |
US6607842(B2) |
申请公布日期 |
2003.08.19 |
申请号 |
US20010758379 |
申请日期 |
2001.01.09 |
申请人 |
HITACHI GLOBEL STORAGE TECHNOLOGIES NETHERLANDS, B.V. |
发明人 |
BIAN XIAOPING;DOERNER MARY FRANCES;MINVIELLE TIM;MIRZAMAANI MOHAMMAD TAGHI;TANG KAI |
分类号 |
G11B5/65;G11B5/66;(IPC1-7):G11B5/65 |
主分类号 |
G11B5/65 |
代理机构 |
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