COLL 111 |
| Jun Zhang, Zaibin Guo, Rong Ji, and Tow Chong Chong. Data Storage Institute, DSI bldg, 5 Eng Dr 1, (Off Kent Ridge Crescent, NUS) , SG117608, Singapore |
A pre-designed lubricant patterns on carbon overcoat are prepared using a Focused Ion Beam (FIB) and UV irradiation respectively. The chemically bonded lubricant patterns are confirmed by TOF-SIMS and a Surface Reflectance Analyzer (SRA). The critical parameters for lubricant patterning and patterned effect on the film uniformity have been investigated. A molecular dynamical simulation also indicates that a patterned lubricant film can provide a better uniformity. The experimental results show that patterned lubricant film with only 19% bonded area is equivalent to the normal lubricant film with 100% bonded area. Well-distributed lubricant patterns can naturally restrict the mobile lubricant molecules during disk rotation and thereafter reduce the lubricant loss. In a monomolecular lubricant film, both bonded component and mobile component control the retention and replenishment of lubricant respectively.  |
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Molecular Tribology
Division of Colloid and Surface Chemistry |