2302 磁気ディスク表面における分子潤滑膜の膜厚安定性に及ぼす紫外線照射の効果(要旨講演,情報機器コンピュータメカニクス2)

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In this study, we investigated the effect of ultraviolet (UV) irradiation on the thickness stability of molecularly thin lubricant films over magnetic disk surfaces. Step-shaped multilayer (3.5-nm-thick) and monolayer (2-nm-thick) perfluoropolyether AM3001 films were dip-coated on magnetic disk surfaces, respectively, and then exposed to 172-nm UV rays through a photomask. We measured the time-dependent thickness profiles of the lubricant films in the UV-irradiated and non-UV-irradiated regions, respectively. By comparing the profiles, we found that for non-UV-irradiated multilayer films, lubricant thickness decreased with time due to the relaxation process, whereas for UV-irradiated multilayer films, the relaxation process was suppressed because of the increased intermolecular interactions. For monolayer films, the relaxation process was not observed regardless of UV irradiation.
2005-03-21