Magnetic tape medium

Details Magnetic tape medium Magnetic tape medium

2008-03-11

2008-03-11

Rickman, Holly (Department: 1794)

Stock material or miscellaneous articles

Magnetic recording component or stock

Binder media

Reexamination Certificate

active

11132791

ABSTRACT:
A magnetic recording medium is provided that can ensure stable recording and reproducing characteristics with little off-track even when a track density in the direction of width of the tape is very high and 50 lines/mm or more, an off-track margin is 5 μm or smaller, and a variation that is permitted at maximum as a dimensional variation in the direction of width of the tape itself due to environmental factors such as the change of temperature and humidity, the change of tension, a creep, etc. is small as low as 0.10% or less. Assuming that Young's modulus in the direction of width of a non-magnetic substrate is X and Young's modulus in the direction of width of the back layer is Y, X is 850 kg/mm2or more, or when X is less than 850 kg/mm2, X×Y is 6×105or more, and assuming that Young's modulus in the direction of width of a layer including a magnetic layer is Z, Y/Z is not larger than 6.0.

REFERENCES:
patent: 5997987 (1999-12-01), Koizumi et al.
patent: 2003/0054204 (2003-03-01), Kasuga et al.
patent: 2003/0203240 (2003-10-01), Seng et al.
patent: 2006/0087767 (2006-04-01), Hirai

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