Glide head for detecting defects on a disk surface

Details Glide head for detecting defects on a disk surface Glide head for detecting defects on a disk surface

1998-06-05

2000-10-31

Larkin, Daniel S.

Measuring and testing

Surface and cutting edge testing

Roughness

G01B 528, G01B 734, G01B 1708

Patent

active

061385026

ABSTRACT:
A glide head for testing the surface of a magnetic disk includes a slider, a type 2 piezo-electric transducer mounted on the slider, and a type 1 piezo-electric transducer mounted on the type 2 piezo-electric transducer. The piezo-electric transducers are mechanically coupled to one another but not electrically coupled to one another. The electrical voltage provided by the type 2 piezo-electric transducer is more sensitive to magnetic disk surface defects than if the type 1 piezo-electric transducer were not present.

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Wallash, A. "Reproduction of Slider Vibrations During Head/Disk Interactions Using PZT Sensors", IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, pp. 2763-2765.
"Guide to Modern Piezoelectrc Ceramics", Morgan Matroc, Inc., Electro Ceramics Division, pp. 1-27.
Van Vlack, "A Textbook of Materials Technology", Addison-Wesley Publishing Co., 1973, pp. 234-238.

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