Abstract: A highly fluorinated lubricant configured to be adsorbed by an overcoat of a magnetic recording medium. The lubricant may have a structure: where Rf is —CF2O(CF2CF2O)nCF2— where n is from 1 to about 100, or Rf is —CF2CF2O(CF2CF2CF2CF2O)sCF2CF2—, —CF2CF2O(CF2CF2CF2O)sCF2CF2—, —CF2CF2O[CF(CF3)CF2O]sCF2CF2—, —CF2O(CF2CF2O)r(CF2O)sCF2—, or —CF2O(CF2CF2O)CF2—and r, s are independently from 1 to about 100, and R1 is a fluorinated hydrocarbon having a functional group terminating in —OH.

Abstract: An aromatic or aromatic-like group(s) containing lubricant configured to be adsorbed by a magnetic recording media is formed from (Ar)m(R1oRfR2p)q where Ar is an aromatic group, polyaromatic hydrocarbon (PAH), annulene, cycloalkane or heterocycle, m=1-10, R1 and R2 are moieties containing first and second polar groups, respectively, Rf is a perfluorinated polyether, o=1-10, p=0-10, and q=1-10. The first or second polar group may independently be hydroxyl, phosphonic acid, silanol or carboxylic acid. In an embodiment, the lubricant has the formula: where Ar is a system form d from a PAH, armulene, cycloalkane or heterocycle, X, Y and Z can independently be hydroxyl, a phosphonic acid moiety, a silanol or a carboxylic acid moiety, and where Rf may be CF2O(CF2CF2)nCF2— where n is 1 to 100. Synthesizing the lubricant may entail reacting parabromophenol with (Ar)m(R1oRfR2p)q.

Abstract: A lubricant adheres to a magnetic recording medium via at least one of chemisorption or bonding, and contains a perfluorinated polyether attached to or terminated with a functional group that is phosphonic acid, silanol or carboxylic acid, and may be: R1—Rf—R1 where Rf is —CF2O(CF2CF2CF2CF2O)n—, —CF2O(CF2CF2CF2O)nCF2—, —CF2O[CF(CF3)CF2O]nCF2—, —CF2O(CF2CF2O)m(CF2O)nCF2—, —CF2O(CF2CF2O)nCF2—, n, m is from 1 to 100 and R1 is the functional group. A lubricant is formed from a multiple ether segments according to formula: Re1—Rb1-Ri-Rc-Ri-Rb2—Re2; where Rc includes perfluoroalkyl ether, Rb1 and Rb2 are, independently, a sidechain segment including a perfluoroalkyl ether, optional Ri independently is a divalent linking segment including a functional group including elements from periodic table Group 13-17, and of Re1 and Re2 are phosphonic acid, silanol or carboxylic acid.

Abstract: A glass disk substrate inspection tool uses a polarized laser beam that is directed to the first surface of the disk substrate at Brewster's angle and is then transmitted through the disk substrate to a light detector that generates a signal representative of the intensity of the light received. Because the light polarized parallel to the plane of incidence, i.e., the plane formed by the line of the incident beam and a line perpendicular to the surface of the disk substrate, is completely transmitted, there is no surface reflection at either the first or second surfaces of the disk substrate. The polarized beam is directed by a first rotating scanner to the input of a telecentric lens assembly that provides an output beam parallel to its optical axis as the beam is being scanned. The beam is then directed by a first fixed mirror to strike the first surface of the disk substrate at Brewster's angle as the beam is scanned along a line across the first disk surface.