NDLI: The Instability of Angstrom-Scale Head-Disk Interface Induced by Electrostatic Force

Content Provider	IEEE Xplore Digital Library
Author	Yu Wang Xiongfei Wei Xianghua Liang Shiyan Yin Yanyang Zi Yizhen Peng Kwok-Leung Tsui
Copyright Year	1965
Abstract	When the storage density is several Tb/in², the head-disk spacing will drop into an angstrom-scale regime. At such small clearance, the electrostatic force (EF) becomes increasingly significant. However, the electrostatic-induced head-disk interface (HDI) instability and the relevant reliability were not well addressed in the past. Therefore, this paper investigates the instability of angstrom-scale HDI induced by the EF. First, the hysteresis effect of the touchdown-takeoff was investigated with/without eliminating the surface potential difference. The electrical powers of thermal flying-height control head were supplied and then released to capture the hysteresis effect. It is found that a significant improvement of the hysteresis effect has been achieved when the electrostatic potential was eliminated. Second, a wear test for over 60 h was performed when the head-disk clearance was set at an angstrom scale. It is also found that the wear robustness has been greatly improved by eliminating the electrostatic potential. This study will help the design of the head-disk system for better reliability, especially for wear and flying stability.
Sponsorship	IEEE Magnetics Society
Starting Page	1
Ending Page	4
Page Count	4
File Size	1047612
File Format	PDF
ISSN	00189464
Volume Number	51
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrostatics Electric potential Reliability Force Magnetic hysteresis Heating Magnetic heads tribological reliability Head-disk interface electrostatic force tribocharging Electrostatic force (EF) head–disk interface (HDI)
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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The instability of angstrom-scale head-disk interface induced by electrostatic force

Tribological Degradation of Head–Disk Interface in Hard Disk Drives Under Accelerated Wear Condition

An In Situ Measurement Method for Electric Potential at Head-Disk Interface Using a Thermal Asperity Sensor

Electrostatic Force Manipulation Methodology: Principles, Mechanisms, and Setup for Head–Disk Interactions Monitoring

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Effect of Molecular Structure of PFPE Lubricant on Interaction at HDI in Near-Contact Operation

Electrostatic discharge and electrical breakdown study of the head-disk interface in a hard disk drive

Electrostatic Discharge (ESD) Breakdown Between a Recording Head and a Disk With an Asperity

The Instability of Angstrom-Scale Head-Disk Interface Induced by Electrostatic Force

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