Abstract
Targeting both higher touchdown sensitivity and highly accurate nanometer-scale defect detection on a disk surface, a thermal-contact sensor, integrated into a magnetic-head slider, was developed. It was experimentally shown that the contact sensor has sensitivity for detecting head-disk contact at each radial position on a disk surface equivalent to that of a conventional acoustic-emission (AE) sensor. It was also shown that a defect-detection method using the thermal-contact sensor is feasible. Defect mapping, in which a slider inspecting the disk at a certain clearance detects small defects on the disk surface, done with this method was better sensitive with measurements with an optical surface analyzer (OSA). Defect mapping on a proto-type glide tester, based on a conventional glide tester, using the thermal-contact sensor was also demonstrated.
Original language | English |
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Article number | 6028020 |
Pages (from-to) | 3426-3432 |
Number of pages | 7 |
Journal | IEEE Transactions on Magnetics |
Volume | 47 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2011 Oct |
Externally published | Yes |
Keywords
- Contact sensor
- hard-disk drive
- head-disk interface
- tribology
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering