Stock material or miscellaneous articles – Magnetic recording component or stock – Thin film media
Reexamination Certificate
2005-02-09
2009-12-29
Rickman, Holly (Department: 1794)
Stock material or miscellaneous articles
Magnetic recording component or stock
Thin film media
C427S131000
Reexamination Certificate
active
07638211
ABSTRACT:
A magnetic recording medium for high-density recording, having a doped interlayer to preserve the uniformity and ordering of the magnetic nanoparticles in its recording layer. The interlayer is doped with a high electronegativity material. The dopant atoms in the interlayer interact with the ferromagnetic nanoparticles to promote the formation of a homogeneous, ordered monolayer of nanoparticles in the recording layer. In addition, the high electronegative property of the dopant atoms holds the nanoparticles in place during the subsequent annealing process to prevent sintering and disordering damage. In one embodiment, the dopant is a halogen or non-halogen material having a high electronegativity, which is not polymerized to the matrix material in the interlayer. The matrix material may be polymerized. An example of a doped interlayer is a fluorinated carbon film.
REFERENCES:
patent: 4070189 (1978-01-01), Kelley et al.
patent: 6331364 (2001-12-01), Baglin et al.
patent: 6884328 (2005-04-01), Litvinov et al.
patent: 7108927 (2006-09-01), Hattori et al.
patent: 7220482 (2007-05-01), Mino et al.
Nisha Shukla, “Dip-coating of FePt nanoparticle films: surfactant effects”, Elsevier Science, 2001, 2 pgs.
Shishou Kang, “Synthesis, Self-Assembly, and Magnetic Properties of [FePt]1-xAux Nanoparticles”, IEEE Transactions on Magnetics, vol. 39, No. 5, Sep. 2003, pp. 2753-2757.
Hao Zeng, “Interparticle Interactions in Annealed FePt Nanoparticle Assemblies”, IEEE Transactions on Magnetics, vol. 38, No. 5, Sep. 2002, pp. 2598-2600.
Katsuyuki Naito, “2.5-Inch Disk Patterned Media Prepared by an Artificially Assisted Self-Assembling Method”, IEEE Transactions on Magnetics, vol. 38, No. 5, Sep. 2002, pp. 1949-1951.
Victor F. Puntes, “Synthesis, Structural Order & Magnetic Behavior of Self-Assembled E-Co Nanocrystal Arrays”, IEEE Transactions on Magnetics, vol. 37, No. 4, Jul. 2001, pp. 2210-2212.
Roy Carey, “A Self-Forming Nanocrystallite Cobalt Recording Medium”, IEEE Transactions on Magnetics, vol. 36, No. 5, Sep. 2000, pp. 3012-3014.
Barnaby Warne, Self Assembled Nanoparticulate Co : Pt for Data Storage Applications, IEEE Transactions on Magnetics, vol. 36, No. 5, Sep. 2000, pp. 3009-3011.
Ahner Joachim Walter
Shukla Nisha
Weller Dieter
Rickman Holly
Seagate Technology LLC
Westman Champlin & Kelly P.A.
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