Method for preparing a substrate for a magnetic disk

Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate

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427130, 427131, 427132, 427264, 427266, 427269, 427270, 427271, 427287, 427294, 4273831, 427404, B05D 300

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059809973

ABSTRACT:
A method for manufacturing a magnetic disk comprises the step of depositing a metallic layer on a glass substrate and laser texturing the metallic layer. The magnetic disk is then completed by deposition of (a) an underlayer such as Cr or sputtered NiP, (b) a magnetic layer such as a Co or Fe alloy, and (c) a protective overcoat such as ZrO.sub.2, carbon or hydrogenated carbon. By providing the above-mentioned metallic layer, laser texturing can now be used in conjunction with glass substrates.

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P. Baumgart, et al, "Safe Landings: Laser Texturing of High-Density Magnetic Disks", Mar. 1996, Data Storage, pp. 21-24.
Lowenheim, "Modern Eletroplating", pp. 593-595 and pp. 710-725 John Wiley & Sons, 1974 (No month avail.).
Don Perettie, "Alternative Substrates: The Critical Issues", Insight, Nov./Dec. 1995, vol. VIII, No. 6.
D. Krajnovich, et al., "Experimental and Theoretical Studies of Bump Formation During Laser Texturing of Ni-P" IEEE 1996 (No month avail.).
E. Teng, et al., "Laser Zone Texture on Alternative Substrate Disks" IEEE 1996, Intermag conference (No month avail.).
P. Baumgart, et al., "A New Laser Texturing Technique for High Performance Magnetic Disk Drives", IEEE Transactions on Magnetics, vol. 31, No. 6 Nov. 1995.

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