Method for preparing a substrate for a magnetic disk

Details Method for preparing a substrate for a magnetic disk Method for preparing a substrate for a magnetic disk

1996-11-05

1998-04-21

Pianalto, Bernard

Coating processes

Direct application of electrical, magnetic, wave, or...

Pretreatment of substrate or post-treatment of coated substrate

427130, 427131, 427132, 427258, 427264, 427266, 427269, 427270, 427271, 427287, 427355, 4273722, 427404, 4274197, 4274432, 427596, 428 653, 428 655, 428 656, 428 657, B05D 300

Patent

active

057415609

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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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.
P. Baumgart, et al, "Safe Landings: Laser Texturing of High-Density Magnetic Disks", Mar. 1996, Data Storage, pp. 21-24.
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Don Perettie, "Alternative Substrates: The Critical Issues", INSIGHT, Nov./Dec. 1995, vol. VIII, No. 6.

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