Method for measuring magnetic write width in discrete track...

Details Method for measuring magnetic write width in discrete track... Method for measuring magnetic write width in discrete track...

2008-06-26

2010-11-30

Negrón, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S075000, CG9BS027052

Reexamination Certificate

active

07843658

ABSTRACT:
A method of measuring a magnetic write width includes forming a data track on a discrete track medium by a write operation at a first frequency, performing write operations at a second frequency that is different from the first frequency, at both side positions along the formed data track, obtaining a track profile by scanning the data track in a track-width direction, using a magnetic field detection element, calculating an integrated profile of the obtained track profile, obtaining profile integrals by setting a distance from the data track to a position of the write operations at the second frequency to various values and by calculating the profile integrals for the respective values of the distance, and calculating a magnetic write width of the magnetic head and a magnetic write width of the discrete track medium from a relationship between the distance and the profile integrals.

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Lin et al., “Full-Track Profile Derivative Method for Track Width Measurements of Magnetic Recording Head,”IEEE Transactions on Magnetics, vol. 41. No. 10, Oct. 2005, pp. 3067-3069.

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