Aligned stretched surface recording medium

Details Aligned stretched surface recording medium Aligned stretched surface recording medium

G - Physics

11

B

352/31.3

G11B 5/82 (2006.01) G11B 23/00 (2006.01)

Patent

CA 1314981

FN 42555 CAN 9A ALIGNED STRETCHED SURFACE RECORDING MEDIUM Abstract of the Disclosure Stretched surface recording disk (SD) 10 comprises an annular support 12 having raised annular ridges 44 and 32 at or near its inside and outside diameters 22 and 30 with a base portion 24 in between the two ridges, and two annular recording medium films 14 and 16 held in radial tension and stretched across the base portion by adhering the film near the inside and outside diameters. The major principal orientation axis of each annular recording medium film 14 and 16 is determined and the SD assembled so that the axes are aligned in the same direction. This aligning results in SD with reduced track anisotropy due to warping of the annular support 12. As a result, data tracks are more stable than in previous SD, track density can be greater, and the SD is generally more reliable.

601039

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