Piezoelectric glide head

Details Piezoelectric glide head Piezoelectric glide head

1998-08-14

2000-06-13

Larkin, Daniel S.

Measuring and testing

Surface and cutting edge testing

Roughness

G01B 528, G01N 1908

Patent

active

060734868

ABSTRACT:
A glide head for detecting anomalies on a flat surface of a recording disk includes a slider having a sensing edge extending generally radially of the disk and a piezoelectric transducer element attached to one face of the slider and extending therefrom in cantilever fashion. The transducer element is of segmented shape and has a pair of opposed surfaces facing towards and away from the disk surface with spaced electrodes being provided thereon so as to provide stress readings only at specific locations on the body of the transducer element chosen to accentuate particular vibrational modes induced by anomalies on the disk surface.

REFERENCES:
patent: 4532802 (1985-08-01), Yeack-Scranton et al.
patent: 5423207 (1995-06-01), Flechsig et al.
patent: 5450747 (1995-09-01), Flechsig et al.
patent: 5689064 (1997-11-01), Kennedy et al.
patent: 5864054 (1999-01-01), Smith, Jr.
IBM Technical Disclosure Bulletin vol. 34 No. 4A, Sept. 1991, Efficient Piezoelectric Glide Transducer for Magnetic Recording Disk Quality Assurance.
IEEE Transactions on Magnetics, vol. 25, No. 3, Sept. 1989, Natural Frequencies of Sliders and Transducers Used to Detect Slider-Disk Contacts, T. G. Jeong et al., pp. 3725-3727.
IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, Reproduction of Slider Vibrations During Head/Disk Interactions Using PZT Sensors, A. Wallash, pp. 2763-2765.

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