The migration from perpendicular magnetic recording (PMR) to heat assisted magnetic recording (HAMR) in the hard disc drive (HDD) industry brings unique challenges for head disc contact detection (CD) and with precisely setting head disc clearance. In this study we provide numerical model calculations of a head integrated thermistor ’s electric resistance as a function of head disc clearance and compare the modeled results with measurements of thermistor resistance for heads flying over PMR and HAMR media. Such comparisons serve to assess the accuracy of the modeling techniques and to understand the impact that the media type plays in CD capability of the head integrated thermistor. 
Keywords: Hard Disk Drive, PMR, HAMR, Contact Detection, Touch Down, HMS, HDI

Computational and Experimental Investigation of Contact Detect Response of a Head-Integrated Thermistor on HAMR vs. PMR Media

Paper Proceedings: https://asmedigitalcollection.asme.org/ISPS/ISPS2021/volume/84799

ASME 2021 Information Storage and Processing Systems (ISPS2021)

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