Integrated piezoelectric and thermal asperity transducers for te

Details Integrated piezoelectric and thermal asperity transducers for te Integrated piezoelectric and thermal asperity transducers for te

1997-04-24

1999-02-16

Larkin, Daniel S.

Measuring and testing

Surface and cutting edge testing

Roughness

G01B 734, G01B 2130

Patent

active

058723110

ABSTRACT:
A device for testing smoothness of a rotatable disc is disclosed. A slider body has a trailing edge surface and an air-bearing surface for gliding over a surface of the disc when the disc is rotating. A piezoelectric sensor is formed in the slider body, and a thermal asperity sensor is formed in the slider body and at least partially exposed to the air-bearing surface. A plurality of conductive vias extend from the trailing edge surface of the slider body into the slider body to contact the piezoelectric and thermal asperity sensors. A plurality of conductive bond pads are disposed on the trailing edge surface in contact with respective conductive vias.

REFERENCES:
Article entitled "High Frequency Slider Vibrations During Asperity Impacts in Rigid Magnetic Disk Systems" by J.C. Briggs et al., Adv. Info. Storage Syst., vol. 4, 1992, pp. 181-194.

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