Magnetic recording disk having textured test band for controllin

Details Magnetic recording disk having textured test band for controllin Magnetic recording disk having textured test band for controllin

1995-01-27

1996-08-27

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

Disk

428694TR, G11B 582

Patent

active

055506968

ABSTRACT:
A magnetic recording disk has a textured test band that is radially spaced from the textured landing zone and that typically has laser-induced bumps with an average height substantially different from the average height of the laser-induced bumps in the textured landing zone. The bumps in both the test band and the textured band are formed in spiral tracks because the disk is simultaneously rotated and translated radially while the texturing laser is pulsing the disk. However, because the bumps in the textured band are not formed until after the average height of the bumps in the test band have been measured by a second analyzing laser, the two spiral tracks are separate and discontinuous.

REFERENCES:
patent: 4540049 (1985-10-01), Ono et al.
patent: 4698251 (1987-10-01), Fukuda et al.
patent: 4725472 (1988-02-01), Okabe
patent: 5008687 (1991-04-01), Longman et al.
patent: 5062021 (1991-10-01), Ranjan et al.
patent: 5070425 (1991-12-01), Inumochi
patent: 5108781 (1992-04-01), Ranjan et al.
H. M. van Driel, J. E. Sipe & J. F. Young, Laser-Induced Periodic Surface Structure on Solids: A Universal Phenomenon, The American Physical Society, Physical Review Letters, vol. 49, No. 26, pp. 1955-1958, Dec. 27, 1982.
J. F. Young, J. S. Preston, H. M. vanDriel & J. E. Sipe, Laser-induced Periodic Surface Structure. II. Experiments on Ge, Si, Al, and Brass, The American Physical Society, Physical Review B, vol. 27, No. 2, pp. 1155-1172, Jan. 15, 1983.

Affiliated with

Also associated with

Rating

Magnetic recording disk having textured test band for controllin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic recording disk having textured test band for controllin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording disk having textured test band for controllin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1060090