Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1985-03-14
1986-11-18
Thomas, Alexander S.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
360135, 346137, 369280, 369287, 369288, G11B 582
Patent
active
046235701
ABSTRACT:
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 duringmanufacture 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.
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Alexander, J. L., "Dimensional Track Stability Measurement Using a Standard Head", Computer Technology Review, Summer 1984, pp. 102-103.
Business Week, Nov. 12, 1984, p. 154.
Alexander Jerry L.
Gerfast Sten R.
Narayan Sankar B.
Nelson Charles E.
Little D. B.
Minnesota Mining and Manufacturing Company
Sell D. M.
Smith J. A.
Thomas Alexander S.
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