High precision fly height measurement

Details High precision fly height measurement High precision fly height measurement

2005-08-16

2005-08-16

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S075000

Reexamination Certificate

active

06930844

ABSTRACT:
A method for measuring spacing between a head and a storage medium is provided. The method includes obtaining a sample of a readback signal from a sequence of data stored on the storage medium using the head. An amplitude of the readback signal for a plurality of frequencies is calculated. Additionally, the method includes providing a measurement indicative of spacing between the head and the storage medium based on the amplitude.

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Palmer et al, Identification of Nonlinear Write Effects Using Pseudorandom Sequences, IEEE Transactions on Magnetics, vol. Mag-23, No. 5, Sep. 1987, pp. 2377-2379.

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