US 11,898,116 B2
Lubricants and methods to determine dewetting thickness thereof
Bala Krishna Pathem, Fremont, CA (US); Nicholas Ryan Conley, Apex, NC (US); and Bruno Jean Marchon, Palo Alto, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Jul. 13, 2022, as Appl. No. 17/864,265.
Application 17/864,265 is a continuation of application No. 17/227,097, filed on Apr. 9, 2021, granted, now 11,414,617.
Claims priority of provisional application 63/136,991, filed on Jan. 13, 2021.
Prior Publication US 2022/0364008 A1, Nov. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G11B 5/725 (2006.01); C10M 107/38 (2006.01); C08G 65/00 (2006.01); G11B 5/48 (2006.01); C10N 20/04 (2006.01); C10N 50/08 (2006.01); C10N 40/18 (2006.01); G11B 5/00 (2006.01)
CPC C10M 107/38 (2013.01) [C08G 65/007 (2013.01); G11B 5/4826 (2013.01); G11B 5/7257 (2020.08); C10M 2213/043 (2013.01); C10N 2020/04 (2013.01); C10N 2040/18 (2013.01); C10N 2050/08 (2013.01); G11B 5/4866 (2013.01); G11B 2005/0021 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A lubricant comprising:
a plurality of segments, each linked together by ether linkages according to a general formula:
Re1-Rb1-Ri-Rc-Ri-Rb2-Re2;
wherein Rc is a divalent center segment including a perfluoroalkyl ether moiety;
wherein each of Rb1 and Rb2 is, independently, a sidechain segment including a perfluoroalkyl ether moiety;
wherein each Ri is, independently, a divalent linking segment including a functional group including elements from Group 13-17 of the periodic table of the elements;
wherein each of Re1 and Re2 is, independently, a monovalent end segment including a functional group including elements from Group 13-17 of the periodic table of the elements; wherein Rb1≠Rc≠Rb2; and
wherein the lubricant has a bonding percentage of about 70% to about 100% corresponding to a total area of a surface on which the lubricant is located.