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US 6,617,011 B2Granted
Elastomeric lubricants for magnetic recording media
AssigneeSeagate Technology LLC
InventorsJunhua Wu, Ga-Lane Chen
Life of this patent
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Abstract
Elastomeric fluoropolyether lubricant topcoats are formed on a protective overcoat of a magnetic recording medium. Embodiments include forming a an amorphous carbon layer having a thickness of no greater than about 25 Å as the protective overcoat and polymerizing a fluorpolyether having one or more acrylate groups on the amorphous carbon layer to form the elastomeric fluoropolyether topcoat lubricant directly on the protective overcoat.
Claims8
A magnetic recording medium, comprising:
- a substrate,
- a magnetic layer on the substrate;
- an amorphous carbon protective overcoat having a thickness no greater than about 25 Å on the magnetic layer;
- and
- an elastomeric fluoropolyether topcoat directly on said protective overcoat, wherein said elastomeric fluoropolyether topcoat comprises the polymerization product of a fluoropolyether having at least two polymerizable acrylate groups through which polymerization occurs and wherein said protective overcoat and said elastomeric fluoropolyether topcoat have a combined thickness of no greater than about 60 Å.
2 more elements
Dependencies are inferred from the claim text.