Western Digital Technologies, Inc.

Hgst Netherlands, B.v.

Bala Krishna Pathem

Bruno Jean Marchon

Nicholas R Conley

Xingliang He

Erhard Theodor Schreck

Kurt A Rubin

Xing-Cai Guo

Thomas Edward Karis

Robert Waltman

Hong Deng

Franck Dreyfus Rose Dit Rose

Robert James Waltman

A lubricant including a plurality of segments including a divalent center segment and two sidechain segments, each including a perfluoroalkyl ether moieties is provided in which a dewetting thickness of the lubricant may be determined based in-part on a segment weight average molecular weight of the segments. A magnetic recording medium and a magnetic data storage system including the lubricant are also provided.

Lubricants and methods to determine dewetting thickness thereof

High temperature lubricants for magnetic media are provided. One such lubricant includes fluoroalkyl, fluoroalkenyl, perfluoroalkyl, or perfluoroalkyl ether segments, anchoring functional groups engageable with a protective overcoat of a magnetic recording media, and cyclic functional groups. The lubricants can be used in conjunction with a magnetic recording medium and/or a magnetic data storage system.

High temperature lubricants for magnetic media

Low-profile thermally stable lubricants for data storage devices are provided based on multi-dentate molecular designs. One such lubricant comprises perfluoroalkyl ether segments, a divalent linking segment, and anchoring functional groups attachable to, or engageable with, a protective overcoat of a magnetic recording medium. The lubricants can be used in conjunction with a magnetic recording medium and/or a magnetic data storage system.

Low profile lubricants for data storage devices

In one embodiment, a multidentate perfluoropolyether (PFPE) lubricant has the formula S-S-S-S-S-S-S, where each Sincludes at least one perfluoroethyl ether unit, Sis a linker segment, and each Sand Sinclude at least one functional group configured to attach to a surface. In another embodiment, a multi dentate PFPE lubricant has the formula S-S-S-S-S-S-S, where each S, S, and Sinclude at least one perfluoroethyl ether unit with the proviso that Shas a different number of perfluoroethyl ether units than at least one of Soand S, and each Sand Sinclude at least one functional group configured to attach to a surface.

Low profile multidentate lubricants for use at sub-nanometer thicknesses in magnetic media

According to one embodiment, a lubricant includes a multidentate perfluoropolyether having a chemical structure of: R&#x2014;R&#x2014;R&#x2014;R&#x2014;R&#x2014;R&#x2014;R, where Rincludes at least one perfluoroethyl ether unit, and where Rand Reach include at least one functional group configured to attach to a surface. According to another embodiment, the aforementioned lubricant may be suitable for use in a sub-nanometer thick lubricant layer for various applications, and particularly useful for magnetic recording media.

Ultra-low profile multidentate lubricant for use as a sub-nanometer thick lubricant layer for magnetic media

A method for polishing a carbon overcoat of a magnetic media that results in a smooth surface free of carbon cluster debris. The method involves forming a magnetic disk having a carbon overcoat formed thereon. The carbon overcoat is then polished in the presence of ozone (O). The heat from the polishing process along with the presence of the ozone, cause any carbon particles removed by the polishing to form COgas so that there is no remaining carbon particle debris on the surface of the disk.

Growing community of inventors

Fremont, CA, United States of America

Bala Krishna Pathem