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US 6,150,001 AGranted
Magnetic recording disk with polycyanate ester overlayer
AssigneeInternational Business Machines Corporation
InventorsJames Lupton Hedrick, Charles Mathew Mate, Junhua Wu
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Abstract
Reactive monomers of cyanate esters are vapor deposited onto thin film disks used for magnetic recording. The monomer films are then irradiated with ultraviolet (UV) light to polymerize the deposited monomer to form a solid, robust polycyanate ester overlayer on the disk that becomes smoother, more corrosion resistant and, when lubricated, more durable than disks without the overlayer. The polycyanate ester overlayer can either replace the conventional carbon overcoat or allow a substantially thinner carbon overcoat to be used.
Claims7
A magnetic recording disk comprising:
- a disk substrate;
- an underlayer formed on the substrate;
- a cobalt alloy magnetic layer formed on the underlayer;
- and
- a polycyanate ester overlayer formed over the magnetic layer.
2 more elements
Dependencies are inferred from the claim text.