Laser texturing for low-flying-height media

A novel selective-area texturing process using a pulsed laser to produce a new form of texture in only the landing zone is discussed. By rotating the media under the focused pulsed-laser beam, a row of crater shaped dimples are created in the landing zone only. The rest of the disk remains smooth an...

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Bibliographic Details
Published in:Journal of applied physics 1991-04, Vol.69 (8), p.5745-5747
Main Authors: RANJAN, R, LAMBETH, D. N, TROMEL, M, GOLIGA, P, LI, Y
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Other topics in equations of state, phase equilibria, and phase transitions
Physics
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Summary:A novel selective-area texturing process using a pulsed laser to produce a new form of texture in only the landing zone is discussed. By rotating the media under the focused pulsed-laser beam, a row of crater shaped dimples are created in the landing zone only. The rest of the disk remains smooth and untextured. Contact start-stop (CSS) test results from a lubricated C/CoCrTa/Cr media on the laser-textured substrate exhibited a constant static friction coefficient of 0.17 even after 12-K CSS cycles, with no apparent friction buildup. This unique behavior is attributed to the rounded and smooth surface topography of the laser-textured media.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.347908