During normal operations of a hard disk drive (HDD), a slider flies over the surface of a spinning disk lifted by a thin layer of air. The disk surface is coated by a molecularly-thin layer of lubricant to protect it against corrosion and reduce wear on the read/write head. The flying height of the slider should be as small as possible in order to achieve higher recording densities. In current HDDs the head-to-disk spacing is on the order of 1–3 nm . At this ultra-low spacing lubricant from the disk often transfers to the slider’s air bearing surface (ABS) forming a thin film that imposes a significant degradation on its performance. Problems such as head instabilities, flying stiction, disk lubricant depletion and increase in head-disk spacing occur when lubricant is present on the ABS . To avoid this condition, modern sliders should be able to remove the lubricant from the ABS as fast as possible. Hence, it is necessary to have a thorough understanding of the lubricant flow process and its driving forces.
- Information Storage and Processing Systems Division
Lubricant Flow and Accumulation on the Air Bearing Surface of a Hard Disk Drive
Rodriguez-Mendez, A, & Bogy, DB. "Lubricant Flow and Accumulation on the Air Bearing Surface of a Hard Disk Drive." Proceedings of the ASME 2013 Conference on Information Storage and Processing Systems. ASME 2013 Conference on Information Storage and Processing Systems. Santa Clara, California, USA. June 24–25, 2013. V001T01A019. ASME. https://doi.org/10.1115/ISPS2013-2905
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