160. INVESTIGATION OF TRIBOCHARGING AT THE HEAD-DISK INTERFACE

Department: Mechanical & Aerospace Engineering
Research Institute Affiliation: Center for Magnetic Recording Research (CMRR)
Faculty Advisor(s): Frank E. Talke

Primary Student
Name: Tan Duy Trinh
Email: tdtrinh@ucsd.edu
Phone: 858-534-3175
Grad Year: 2018

Abstract
In modern hard disk drives, the clearance between the slider and the disk is less than 1nm during read and write operations. At such low spacing, intermittent contact between the slider and the disk is likely to occur, resulting in accumulation of electric charge at the head-disk interface. This phenomenon is called tribocharging. In this study, we will experimentally measure tribo-generated voltage and current as a function of head/disk velocity, disk lubricant type, heater power and relative humidity conditions. The magnitude and polarity of the tribo-generated voltage and current at the head-disk interface will be characterized.The effect of the tribo-generated voltage and current on the giant-magneto resistive (GMR) sensors will also be investigated.

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