Patent ID: 11898116
Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC G  C | IPC C  G

Claim 4:
5. The lubricant of claim 1, wherein the lubricant has a segment weight average molecular weight (α) determined according to the formula:

α=[molecular weight of Rb1+molecular weight of Rb2+molecular weight of Rc]÷3;, and
wherein a dewetting thickness of the lubricant, Tdw, is determined according to the formula:

Tdw=ψ (α);

wherein ψ is a function determined from a relationship between a dewetting thickness and a segment weight average molecular weight of a plurality of other lubricants;
wherein each of the plurality of other lubricants includes one or more segments including perfluoroalkyl ether moieties;
wherein the segment weight average molecular weight of each of the plurality of other lubricants is equal to a weight average molecular weight of the one or more segments including perfluoroalkyl ether moieties present in the respective other lubricant; and
wherein the segment weight average molecular weight of each of the plurality of other lubricants is about 300 grams/mole (g/mol) to about 5,000 g/mol.