发明公开
- 专利标题: Magnetic recording disk
- 专利标题(中): Magnetische Aufzeichnungsplatte。
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申请号: EP92308018.8申请日: 1992-09-03
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公开(公告)号: EP0534624A1公开(公告)日: 1993-03-31
- 发明人: Howard, James Kent , Huang, Hung-Chang Ward , Hwang, Cherngye , Wu, Anthony Wai
- 申请人: International Business Machines Corporation
- 申请人地址: Old Orchard Road Armonk, N.Y. 10504 US
- 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: Old Orchard Road Armonk, N.Y. 10504 US
- 代理机构: Burt, Roger James, Dr.
- 优先权: US764582 19910924
- 主分类号: G11B5/64
- IPC分类号: G11B5/64
摘要:
A magnetic recording disk has an improved surface film formed on the disk blank. A sputter-deposited surface coating containing nickel, chromium and oxygen (Ni-Cr-O) is formed on a AlMg disk blank, after which a cobalt alloy magnetic layer is formed over the Ni-Cr-O coating and a protective overcoat is formed over magnetic layer. The use of the Ni-Cr-O coating on the disk blank eliminates the need for a wet electroless deposition process for creation of a surface coating and results in an inherent texturing of the subsequently deposited magnetic film and protective overcoat which conform to the surface texture of the sputter-deposited Ni-Cr-O. The disks made with the Ni-Cr-O surface film exhibit a very law static friction force between the air-bearing slider and the disk surface when the disks are used in contact start/stop (CSS) disk files.
公开/授权文献
- EP0534624B1 Magnetic recording disk 公开/授权日:1996-05-22
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