Browse Prior Art Database

Flying Height Characterization Below 10 nm

IP.com Disclosure Number: IPCOM000010444D
Original Publication Date: 2002-Dec-03
Included in the Prior Art Database: 2002-Dec-03
Document File: 1 page(s) / 37K

Publishing Venue

IBM

Abstract

Flying Height Characterization Below 10 nm

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Flying Height Characterization Below 10 nm

Proposed is a controlled roughness disk surface that can be used to determine the FH due to the dynamic response from the head. Flying Height is characterized by the resonant frequency and detection of contact between the head and disk (ie: Acoustic Emission or Thermal Asperity feedback). The characterization can be any one, a combination of external (as with an Acoustic Emission or LDV) sensors, directly from the head read sensor itself or a self contained sensing element.

The disk texture zones can be either radial spokes or circumferential bands. They can be integrated as a part of the CSS zone, tapered or multi-level textures zones. If implemented at the file level, we can monitor it over time to predict concerns about reliability due to FH or clearance change.

Disclosed by International Business Machines Corporation

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