Branched perfluoro polyethylene glycol (PF-PEG) high performance thin film disk lubricants
AssigneeSeagate Technology LLC
InventorSamuel J. Falcone
Life of this patent
Estimating the term…
Abstract
A non-linear perluoro polyalkylene or perfluoro polyarylene glycol of specific molecular conformation such as plate-like, spherical, or helical and having the formula CFx—[—(—RO—)n—CF3]4−x, wherein R is a C1-C10 linear or branched, substituted or unsubstituted fluoroalkyl or perfluoroalkyl group, or a substituted or unsubstituted fluoroaryl or perfluoroaryl group; x is an integer from 0 to 2; and n is a number between about 1 to about 20 is provided as a lubricant topcoat on a magnetic recording medium. The inventive lubricants are stable and provide increased bonded lube ratios compared to those of conventional lubricants.
Claims9
A magnetic recording medium comprising a lubricant topcoat, wherein the lubricant is a 3-arm or 4-arm fluoropolyether having a formula:
- wherein
- R2 is perfluoroethylene;
- x is 1;
- and
- n is 1 to about 20.
A method of manufacturing a magnetic recording medium, which method comprises depositing a magnetic layer on a substrate and then applying a solution of a lubricant to the surface of the magnetic layer to form a lubricant topcoat thereon, wherein the lubricant comprises a 3-arm or 4-arm fluoropolyether having a formula:
- wherein
- R2 is perfluoroethylene;
- x is 1;
- and
- n is 1 to about 20.
Dependencies are inferred from the claim text.