Laser textured magnetic disk comprising NiNb

Details Laser textured magnetic disk comprising NiNb Laser textured magnetic disk comprising NiNb

1997-08-01

2000-08-15

Pianalto, Bernard

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

360 86, 360 9908, 360135, 36518901, 427256, 427287, 4273763, 4273764, 4273767, 4273768, 4273833, 4273837, 428 653, 428 656, 428457, 428689, B32B 1500

Patent

active

061034045

ABSTRACT:
A method for manufacturing a magnetic disk comprises the steps of depositing NiP (20) on a substrate (22); depositing NiNb (24) on the NiP; and laser texturing the NiNb. "Sombrero" shaped texture features are more easily formed on the substrate/NiP/NiNb structure than a substrate/NiP structure. The disk is completed by depositing an underlayer (e.g. sputtered Cr or NiP), a magnetic layer (e.g. a Co alloy) and a protective overcoat (e.g. by hydrogenated carbon).

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Baumgart et al, "Safe Landings: Laser Texturing of High-Density Magnetic Disks," Mar. 1996, Data Storage, pp. 21-24.
Lowenheim, "Modern Electroplating," pp. 593-595, 710-725, John Wiley & Sons, 1974.
Perettie, "Alternative Substrates: The Critical Issues." INSIGHT, Nov./Dec. 1995, vol. VIII, No. 6.
Krajnovich et al, "Experimental and Theoretical Studies of Bump Formation During Laser Texturing of Ni-P," IEEE, 1996. (No month avail.).
Teng et al, "Laser Zone Texture on Alternative Substrate Disks," IEEE, 1996, Intermag Conference. (No month avail.).
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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