Magnetic recording medium for test purposes, in particular for c

Details Magnetic recording medium for test purposes, in particular for c Magnetic recording medium for test purposes, in particular for c

1988-03-18

1989-05-09

Thibodeau, Paul J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

427128, 428141, 428694, 428900, G11B 564

Patent

active

048288950

ABSTRACT:
A magnetic recording medium for test purposes, in particular for calibrating flying heads, consists of a firm substrate which has a raised calibration area in the form of an arc-shaped step of defined length, width, height and hardness. Sharp initial and end edges in conjunction with a defined minimum arc length give easily evaluated measured signals in the low frequency range. The test recording medium can be used for any type of magnetic layer on recording media and/or for heads associated with these.

REFERENCES:
patent: 4326229 (1982-04-01), Yanagisawa
patent: 4673617 (1987-06-01), Yoshida et al.
patent: 4689260 (1987-08-01), Briska et al.

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