Recording noise reduction

Details Recording noise reduction Recording noise reduction

2005-04-26

2005-04-26

Kiliman, Leszek (Department: 1773)

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C428S690000, C428S690000

Reexamination Certificate

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06884503

ABSTRACT:
A magnetic recording medium includes a highly permeable magnetic layer proximal to a recording layer. During recording, the permeable magnetic layer modifies the recording field from a recording head to produce consistently shaped recording transitions with a significant perpendicular component. The transitions are consistently shaped even though the distance between the recording head and the surface of the medium may change. Transitions so formed result in a reduction of noise from the medium surface roughness. The permeable magnetic layer further reduces noise caused by stray dipole fields.

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Roesler et al., “Experimental Analysis of Tape Noise,” IEEE Transactions on Magnetics, vol. 37, No. 4, pp. 1627-1629 (Jul. 2001).

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