Hydroxyethyloxymethyl terminated perfluoropolyethers for lubrication of discs in information storage systems
AssigneeSeagate Technology LLC
InventorsMichael Joseph Stirniman, Samuel John Falcone, Bruno Jean Marchon, Jing Gui
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Abstract
An information storage system including a perfluoropolyether lubricant having hydroxyethyloxymethyl terminated endgroups on the surface of a rigid storage medium is provided. In the subject invention, the perfluoropolyether lubricant has the general repeat formula of: HOp(CH2—CH2O)CH2—Z—CH2(OCH2—CH2)pOH where Z is —CF2—(OC2F4)m—(CF2)n—OCF2—, p has an average value of 1.5, the ratio of m to n is approximately 1.0, and the mean molecular weight of the lubricant is in the range of approximately 2000 to 6000.
Claims6
An information storage system comprising:
- a rigid information storage medium having a nitrogenated carbon overcoat or hydrogenated nitrogenated carbon overcoat on a surface of said medium;
- at least one read/write head comprising a transducer for information introduction and/or retrieval from said medium;
- an actuator supporting said at least one read/write head for moving said transducer relative to said storage medium;
- and
- lubricating means for lubricating the surface of said storage medium, wherein said lubricating means includes a perfluoropolyether with hydroxyethyloxymethyl endgroups having the formula of:
- HOp(CH2—CH2O)CH2—Z—CH2(OCH2—CH2)pOH
- where Z is —CF2—(OC2F4)m—(OCF2)n—OCF2—, and p has an average value of 1.5, the ratio of m to n is approximately 1.0, and where said lubricating means has a molecular weight in the range of approximately 2000 to 6000 AMU.
A disc for use in an information storage system characterized in that a lubricant including a perfluoropolyether with hydroxyethyloxymethyl endgroups is disposed on the surface of said disc, wherein the disc includes a nitrogenated carbon overcoat or a hydrogenated nitrogenated carbon overcoat on the surface of the disc, said lubricant having the chemical formula of:
- HOp(CH2—CH2O)CH2—Z—CH2(OCH2—CH2)pOH
- where Z is —CF2—(OC2F4)m—(OCF2)n—OCF2—, and p has an average value of 1.5, the ratio of m to n is approximately 1.0, and where said lubricant has a molecular weight in the range of approximately 2000 to 6000 AMU.
A lubricant disposed on the surface of a disc having a nitrogenated carbon overcoat or a hydrogenated nitrogenated carbon overcoat comprising:
- a perfluoropolyether with hydroxyethyloxymethyl endgroups having the chemical formula of:
- HOp(CH2—CH2O)CH2—Z—CH2(OCH2—CH2)pOH
- where Z is —CF2—(OC2F4)m—(OCF2)n—OCF2—, and p has an average value of 1.5, the ratio of m to n is approximately 1.0, and where said lubricant has a molecular weight in the range of approximately 2000 to 6000 AMU.
Dependencies are inferred from the claim text.