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Sensor for Characterizing Magnetic Recording Heads

IP.com Disclosure Number: IPCOM000065330D
Original Publication Date: 1985-Nov-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Brady, MJ Speidell, JL [+details]

Abstract

In magnetic recording systems, the storage capacity of the system depends not only on the disk media but on the resolution of the head which is used in the recording process. Therefore, it is critical to determine the magnetic properties of the recording heads. These properties are usually examined by analysis of played-back waveforms, calculations based on models of the head and recording media or direct magnetic measurements in the head-recording media area. The most accurate method of quantifying the magnetic properties of the head uses a high resolution Hall-effect probe which is moved on a point-by-point basis over the recording head. Sensors of this type have been produced and tested but suffer from several problems.