LUBRICANTS COMPRISING PFPE TERMINATED WITH BENZENE OR FUNCTIONAL BENZENE END GROUPS FOR MAGNETIC RECORDING MEDIA STRUCTURE
A novel lubricant comprising a perfluoropoyether (PFPE) molecule terminated with a benzene molecule or a functional benzene molecule for a magnetic recording media structure is disclosed. The magnetic recording media structure includes a substrate, a magnetic recording layer for recording information disposed over the substrate, a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer, and a lubricant layer disposed over the protective overcoat layer and comprising a perfluoropoyether (PFPE) molecule terminated with a benzene molecule or a functional benzene molecule.
1 . A magnetic recording media structure comprising:
a substrate;
a magnetic recording layer for recording information disposed over the substrate;
a protective overcoat layer for protecting the magnetic recording layer disposed over the magnetic recording layer; and
a lubricant layer disposed over the protective overcoat layer and comprising a perfluoropoyether (PFPE) molecule terminated with a benzene molecule or a functional benzene molecule.
2 . The magnetic recording media structure of claim 1 , wherein the magnetic recording media structure is a heat assisted magnetic recording (HAMR) media structure.
3 . The magnetic recording media structure of claim 1 , wherein the protective overcoat layer has a thickness between about 0.5 and 4 nm.
4 . The magnetic recording media structure of claim 1 , wherein the lubricant layer has a thickness between about 0.5 and 3 nm.
5 . The magnetic recording media structure of claim 1 , wherein the protective overcoat layer comprises a carbon overcoat (COC).
6 . The magnetic recording media structure of claim 1 , wherein the functional benzene molecule is a benzene ring with one or more of its hydrogen atoms replaced with F, CH3, NH2, OH, or CF3.
7 . The magnetic recording media structure of claim 1 , wherein two end groups of the PFPE molecule are terminated with two benzene molecules or two functional benzene molecules.
8 . The magnetic recording media structure of claim 7 , wherein a benzene molecule or a functional benzene molecule is attached to the backbone of the PFPE molecule at an intermediate location.
9 . A method of lubricating a hard disk drive, the method comprising:
providing a magnetic recording media stack comprising a magnetic recording layer for recording information and a protective overcoat layer disposed over the magnetic recording layer; and
providing a lubricant layer disposed over the protective overcoat layer and comprising a perfluoropoyether (PFPE) molecule terminated with a benzene molecule or a functional benzene molecule.
10 . The method of claim 9 , wherein the magnetic recording media stack is a heat assisted magnetic recording (HAMR) media stack.
11 . The method of claim 9 , wherein the protective overcoat layer comprises a carbon overcoat (COC).
12 . The method of claim 9 , wherein the functional benzene molecule is a benzene ring with one or more of its hydrogen atoms replaced with F, CH3, NH2, OH, or CF3.
13 . The method of claim 9 , wherein two end groups of the PFPE molecule are terminated with two benzene molecules or two functional benzene molecules.
14 . The method of claim 13 , wherein a benzene molecule or a functional benzene molecule is attached to the backbone of the PFPE molecule at an intermediate location.
15 . A lubricant for a magnetic recording media structure comprising a perfluoropoyether (PFPE) molecule having at least one end group terminated with a benzene molecule or a functional benzene molecule.
16 . The lubricant of claim 15 , wherein the PFPE molecule is terminated with two benzene molecules or two functional benzene molecules.
17 . The lubricant of claim 16 , wherein a functional benzene molecule is attached to the backbone of the PFPE molecule at an intermediate location.