Title :
Flyability and flying height modulation measurement of sliders with sub-10 nm flying heights
Author :
Zeng, Q.H. ; Thornton, B.H. ; Bogy, D.B. ; Bhatia, C.S.
Author_Institution :
IBM Almaden Res. Center, San Jose, CA, USA
Abstract :
An experimental system is set up, and a procedure is proposed for measuring the flying height modulation (FHM) at the head-disk interface of a magnetic disk drive by using laser Doppler vibrometry (LDV). A precision trigger, a large number of averages, and a suitable filter are key to successfully measuring the FHM. Better results can be obtained from the velocity output of the LDV as opposed to the displacement output.
Keywords :
Doppler measurement; height measurement; magnetic disc storage; magnetic heads; measurement by laser beam; flyability; flying height modulation measurement; head-disk interface; laser Doppler vibrometry; magnetic disk drive; slider; Acoustic signal detection; Drives; Frequency domain analysis; Laboratories; Laser beams; Loss measurement; Mechanical engineering; Oscilloscopes; Position measurement; Stability;
Conference_Titel :
Asia-Pacific Magnetic Recording Conference, 2000. APMRC 2000
Conference_Location :
Tokyo, Japan
Print_ISBN :
0-7803-6254-3
DOI :
10.1109/APMRC.2000.898923
