Magnetic recording media using directly textured glass

Details Magnetic recording media using directly textured glass Magnetic recording media using directly textured glass

2007-11-20

2007-11-20

Bernatz, Kevin M. (Department: 1773)

Dynamic magnetic information storage or retrieval

Record medium

C360S135000, C428S829000, C428S831200, C428S832000, C428S832100, C428S832200

Reexamination Certificate

active

10869007

ABSTRACT:
A magnetic recording medium deposited on glass and having an orientation ratio greater than one is disclosed. The magnetic recording medium includes a CoW seedlayer deposited on a circumferentially textured glass substrate. The magnetic recording medium with such a seedlayer can have an OR that is similar or higher than that with a NiP seedlayer. Magnetic recording medium with a CoW seedlayer can produce oriented glass media with orientation ratio OR>1 when sputtered on substrates which have been circumferentially textured before the deposition of the CoW seedlayer. The W content of the CoW seedlayer can range between 30-50 at %. The thickness of the CoW seedlayer can range between 10 Å and 200 Å. The method for sputter depositing the magnetic recording medium is also disclosed and includes sputter depositing the CoW seedlayer using pure Ar as sputtering gas or using a mixture of Ar and O2, H2O and N2as sputtering gas.

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