Polymeric perfluoro polyether silyl ether lubricant topcoat
AssigneeSeagate Technology LLC
InventorSamuel J. Falcone
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Abstract
The degree of bonding of a perfluoro polyether lubricant topcoat to various protective overcoats of magnetic recording media is improved by forming a silyl ether of the perfluoro polyether lubricant. The degree of bonding of the lubricant topcoat to a particular protective overcoat is optimized and controlled by selecting a silyl ether end group having a high affinity for the protective overcoat.
Claims24
A magnetic recording medium comprising a lubricant topcoat, wherein the lubricant topcoat comprises a silyl ether lubricant having the following formula:
- ##STR14## wherein:
- Z is a fluoroalkylether group;
- x is 1 or 2;
- and R.sub.1, R.sub.2 and R.sub.3 are each selected from the group consisting of alkyl and aromatic organic radicals and stable halogenated derivatives thereof and wherein at least one of R.sub.1, R.sub.2 or R.sub.3 is alkyl or a stable halogenated derivative thereof.
A method of manufacturing a magnetic recording medium, which method comprises:
- forming a magnetic layer on a non-magnetic substrate;
- and
- forming a lubricant topcoat on the magnetic layer, wherein the lubricant topcoat comprises a silyl ether lubricant having the following formula:
- ##STR15## wherein:
- Z is a fluoroalkylether group;
- x is 1 or 2;
- and R.sub.1, R.sub.2 and R.sub.3 are each selected from the group consisting of alkyl and aromatic organic radicals and stable halogenated derivatives thereof and wherein at least one of R.sub.1, R.sub.2 or R.sub.3 is alkyl or a stable halogenated derivative thereof.
Dependencies are inferred from the claim text.