Method of coating smooth electroless nickel on magnetic...

Stock material or miscellaneous articles – Magnetic recording component or stock – Magnetic recording media substrate

Reexamination Certificate

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C428S846900, C428S848200

Reexamination Certificate

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06986956

ABSTRACT:
A method of manufacture of thin film magnetic disks and other useful articles of similar planar geometry in which a non-magnetic layer is first deposited on one or both sides of the disk or article substrate to mask chemical and mechanically induced heterogeneities introduced by pre-polishing to achieve a smooth finish, typically resulting in cold-working of the surface, and to also bind to the substrate and is then coated with a thin layer of metal selected to either reactively or catalytically initiate smooth, electroless deposition of a non-magnetic nickel alloy which is subsequently polished and coated with additional thin layers to provide magnetic read-write capability. A disk drive using one or more of such disks is provided.

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