161. INVESTIGATION OF WEAR AND ELECTROSTATIC FORCES 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: Karcher William Morris
Email: k6morris@ucsd.edu
Phone: 714-337-8766
Grad Year: 2018

Abstract
In order to increase areal density within a hard disk drive, the flying height of a magnetic recording slider over a disk has decreased to the sub-nanometer regime. At such close spacing, electrostatic forces exist between the slider and the disk that can lead to undesirable contact and wear on the interface. Wear on thermal flying height control sliders is investigated as a function of bias voltage across the head and the disk, relative humidity within the enclosing environmental chamber, and heater power input to the slider to alter flying height. The contact potential and the electrostatic force between the head and the disk is monitored using the Kelvin probe method which is a non-contact method providing a characterization of the interface before and after wear is induced on the head. .

Industry Application Area(s)
Electronics/Photonics | Materials | Mechatronics

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