发明授权
- 专利标题: Magnetic recording disk with metal nitride texturing layer
- 专利标题(中): 带有金属氮化物纹理层的磁记录盘
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申请号: US309274申请日: 1994-09-20
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公开(公告)号: US5705287A公开(公告)日: 1998-01-06
- 发明人: Mary Frances Doerner , James Harvey Kaufman , Serhat Metin , Seyyed Mohammad Taghi Mirzamaani , Anthony Wai Wu
- 申请人: Mary Frances Doerner , James Harvey Kaufman , Serhat Metin , Seyyed Mohammad Taghi Mirzamaani , Anthony Wai Wu
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 主分类号: G11B5/66
- IPC分类号: G11B5/66 ; G11B5/64 ; G11B5/72 ; G11B5/73 ; G11B5/738 ; G11B5/84 ; G11B5/70
摘要:
A thin film cobalt alloy magnetic recording disk has a metal nitride layer located between the disk substrate and the top surface of the disk to provide texturing of the disk at the head-disk interface. The texturing layer is made up of generally contiguous clusters of aluminum nitride (AlN) with rounded upper surfaces that are formed on top of the substrate and under the conventional Cr underlayer. The AlN texturing layer is formed by sputtering an Al target in the presence of N.sub.2 gas. The subsequently sputter-deposited Cr underlayer, cobalt alloy magnetic layer and protective amorphous carbon overcoat replicate the upper surface of the contiguous AlN clusters, resulting in a textured surface at the head-disk interface. The AlN texturing layer may also be sputter deposited above the magnetic layer in the middle of the protective carbon overcoat. The density and size of the AlN clusters in the texturing layer, and thus the texture of the completed disk at the head-disk interface, are controlled by the amount of N.sub.2, the sputtering power and pressure, and the substrate temperature.
公开/授权文献
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