再颁专利
- 专利标题: Recording medium annealing process
- 专利标题(中): 记录介质退火工艺
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申请号: US265905申请日: 1988-11-02
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公开(公告)号: USRE34765E公开(公告)日: 1994-10-25
- 发明人: Jerry L. Alexander , Sankar B. Narayan , Sten R. Gerfast , Charles E. Nelson
- 申请人: Jerry L. Alexander , Sankar B. Narayan , Sten R. Gerfast , Charles E. Nelson
- 申请人地址: MN St. Paul
- 专利权人: Minnesota Mining and Manufacturing Company
- 当前专利权人: Minnesota Mining and Manufacturing Company
- 当前专利权人地址: MN St. Paul
- 主分类号: G11B5/73
- IPC分类号: G11B5/73 ; B32B27/00 ; G11B5/82 ; G11B23/00 ; G11B5/85 ; G11B5/84
摘要:
Stretched surface recording disk (SD) 10 comprises an annular support 12 having raised annular ridges 42 and 28 at its inside and outside diameters 22 and 30 with a base portion 24 in between the two ridges, and an annular recording medium film 14 held in radial tension and stretched across the base portion by adhering the film to attachment surfaces 48 and 36 near the inside and outside diameters respectively. The SD is annealed twice during manufacture to relieve stress in the stretched film 14. This annealing results in SD essentially free from track anisotropy and stress distribution anisotropy in the plane of the disk. As a result, data tracks are more stable than in previous SD, track density can be greater, and the SD is generally more reliable.