Reference disk for determining glide height

Details Reference disk for determining glide height Reference disk for determining glide height

1997-08-28

1999-09-21

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

Disk

G11B 582

Patent

active

059562170

ABSTRACT:
A reference disk, used to determine the glide height of a transducer head above the surface of a magnetic recording medium, is accurately formed by employing a laser light beam to produce protrusions on the reference disk. The protrusions can be formed in a variety of effective patterns to obtain a stable electrical signal. Embodiments include circumferential rows of uniformly or randomly spaced protrusions.

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a New Laser Texturing Technique for High Performance Magnetics, vol. 31, No. 6, pp. 2946-2951, Nov. 1995.

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