Method for texturing magnetic disks

Details Method for texturing magnetic disks Method for texturing magnetic disks

1989-11-02

1990-11-27

Pianalto, Bernard

Coating processes

Magnetic base or coating

Magnetic coating

427127, 427128, 427292, 427444, 428 64, 428900, B05D 512

Patent

active

049734962

ABSTRACT:
A magnetic disk is rotated while a tape of initially abrasive free permeable cloth tape is fed around a roller in engagement with a radial region of the disk surface. A slurry with free abrasive particles is applied to the tape prior to engagement of the tape with the disk. The roller is radially oscillated and the oscillation frequency is related to the disk rotation speed to abrade grooves in the disk surface in a pattern in which grooves vary from the circumferential direction by no more than a maximum angle of 5 to 45, preferably 8, degrees. The slurry application is halted and a rinse liquid is applied to the disk surface while the feeding of clean tape continues. Thin film layers including a magnetic medium are deposited on the abraded disk surface. The groove pattern may be abraded on the entire magnetizable area of the disk surface or may be restricted to the head landing area.

REFERENCES:
patent: 4287225 (1981-09-01), Kneller et al.
patent: 4698251 (1987-10-01), Fukuda et al.
patent: 4735840 (1988-05-01), Hedgcoth
Tsai et al., Tribological Phenomena at the Head Disk Interface of Thin-Film Rigid Disks, J. Vac. Sci. Technol., A7 (3) May/Jun. 1989.

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