Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2005-02-01
2005-02-01
Rickman, Holly (Department: 1773)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S611000, C428S900000
Reexamination Certificate
active
06849349
ABSTRACT:
Magnetic films having magnetic regions and non-magnetic regions are disclosed. The film is subjected to ion irradiation in order to produce chemically disordered regions in the film. The irradiated disordered regions may correspond to the non-magnetic regions of the film. Alternatively, the irradiated disordered regions may correspond to the magnetic regions of the film. In one embodiment, portions of a magnetic CrPt3film are converted to non-magnetic regions by irradiating the regions with boron ions which disorder the CrPt3film in the treated regions. The film may be patterned into magnetic regions and non-magnetic regions for applications such as magnetic recording media in computer disc drive systems.
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Ju Ganping
Klemmer Timothy John
Laughlin David Eugene
Leonhardt Todd Dennis
van de Veerdonk Rene Johannes Marinus
Carnegie Mellon University
Pietragallo Bosick & Gordon
Rickman Holly
Towner, Esq. Alan G.
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