发明授权
US5441788A Method of preparing recording media for a disk drive and disk drive
recording media
失效
制备磁盘驱动器和磁盘驱动器记录介质的记录介质的方法
- 专利标题: Method of preparing recording media for a disk drive and disk drive recording media
- 专利标题(中): 制备磁盘驱动器和磁盘驱动器记录介质的记录介质的方法
-
申请号: US148136申请日: 1993-11-03
-
公开(公告)号: US5441788A公开(公告)日: 1995-08-15
- 发明人: Darrel R. Bloomquist , Stephan P. Howe , Arun K. Agarwal
- 申请人: Darrel R. Bloomquist , Stephan P. Howe , Arun K. Agarwal
- 申请人地址: CA Palo Alto
- 专利权人: Hewlett-Packard Company
- 当前专利权人: Hewlett-Packard Company
- 当前专利权人地址: CA Palo Alto
- 主分类号: G11B5/82
- IPC分类号: G11B5/82 ; G11B5/73 ; G11B5/738 ; G11B5/84 ; B32B3/02 ; B32B3/10 ; G11B5/66
摘要:
A magnetic recording disk has a layered structure comprising a metal substrate, a layer of NiP atop the metal substrate, the NiP layer having a surface roughness of less than 2.0 nanometers RMS, a metal layer over the polished NiP layer, the metal layer having a desired textured outer surface as a result of the sputter deposition, the textured outer surface being characterized by a cobblestone-like metallic grain structure with between 10 and 100 grains per square micron, an RMS surface roughness of between 1.0 and 8.0 nanometers, and with peak heights as measured from the mean plane of the surface over a 10 micron square area of between 2.0 and 20.0 nanometers, a magnetic layer atop the metal layer.
公开/授权文献
- US4829348A Disconnectable power semiconductor component 公开/授权日:1989-05-09
信息查询
IPC分类: