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Nano-texturing of magnetic recording sliders via laser ablation |
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| Authors: | U P Hausmann Philipp Joerges J Heinzl F E Talke |
| Affiliation: | 1. Department for Micro Technology and Medical Device Technology, Technische Universit?t München, Boltzmannstr. 15, 85748, Garching, Germany 2. Institute of Design and Production in Precision Engineering, Universit?t Stuttgart, Pfaffenwaldring 9, 70550, Stuttgart, Germany 3. Center for Magnetic Recording Research, University of California San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0401, USA |
| Abstract: | To increase the storage density of hard disk drives, the flying height of the slider needs to be reduced to <10 nm. This requires super-smooth surfaces of the disk and slider. As the roughness decreases, stiction and adhesion are found to increase substantially leading to failures of the head/disk interface. Texturing the slider surface is a well-known approach to this issue. In this study we investigated laser ablation as a potential process for texturing magnetic recording sliders. It was found that straight laser machining caused unwanted re-deposition of material. These deposits could be significantly reduced by using a chemical etching enhanced laser process. |
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