Optical flying-height testing of magnetic read-write heads

Peter J. de Groot; Leslie L. Deck; James A. Soobitsky; James F. Biegen

doi:10.1117/12.250775

18 September 1996 Optical flying-height testing of magnetic read-write heads

Peter J. de Groot, Leslie L. Deck, James A. Soobitsky, James F. Biegen

Proceedings Volume 2782, Optical Inspection and Micromeasurements; (1996) https://doi.org/10.1117/12.250775
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France

Abstract

Quality control in the production of rigid disk drives depends in part on accurate metrology of the read-write head. We review the established technologies for measuring the distance or flying height between the head and the rotating disk, and propose a new instrument based on polarization interferometry. The new instrument has excellent repeatability, high sensitivity at low flying height and in situ determination of the phase change on reflection.

Citation Download Citation

Peter J. de Groot, Leslie L. Deck, James A. Soobitsky, and James F. Biegen "Optical flying-height testing of magnetic read-write heads", Proc. SPIE 2782, Optical Inspection and Micromeasurements, (18 September 1996); https://doi.org/10.1117/12.250775

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