Layered thin-film media for perpendicular magnetic recording

Details Layered thin-film media for perpendicular magnetic recording Layered thin-film media for perpendicular magnetic recording

2006-11-21

2006-11-21

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

Reexamination Certificate

active

07138196

ABSTRACT:
A perpendicular magnetic recording medium having good perpendicular magnetic anisotropy. The magnetic recording medium includes a tantalum (Ta) seedlayer and a ruthenium (Ru) underlayer. The magnetic recording layer can be fabricated from cobalt (Co) alloys. With the Ta seedlayer, the perpendicular anisotropy and c-axis orientation of the magnetic recording layer are greatly enhanced. Unity squareness is achievable as is a negative nucleation field. The magnetic recording medium can be formed by sputtering the various layers onto a substrate. Thus, a perpendicular magnetic recording medium suitable for mass production is provided.

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“RUxCr1-x/Ta underlayer for Co-Alloy Perpendicular Magnetic Recording” Weirman et al., presented at the 46th Magnetism and Magnetic Material's Conference, Seattle, WA, Nov. 12-16, 2001 (Abstract Mailed on Sep. 17, 2001).

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