NDLI: Air-Bearing Design Towards Highly Stable Head–Disk Interface at Ultralow Flying Height

Content Provider	IEEE Xplore Digital Library
Author	Bo Liu Shengkai Yu Mingsheng Zhang Gonzaga, L. Hui Li Jin Liu Yansheng Ma
Copyright Year	1965
Abstract	Pushing recording density towards tera-bit per square inch and beyond requires reducing flying height to 2.5-3 nm or below. One critical challenge at such ultralow flying height is the possible head-disk crash or unstable head-disk spacing due to short-range interaction forces, such as electrostatic force, intermolecular forces, lubricant interaction force, and so on. Slider design and design strategy are investigated in this work aiming at significantly increased stability of the head-disk spacing at ultralow flying height. Nonzero surface roughness leads to a roughness-limited possible minimum flying height. A stable head-disk interface requires a full air-bearing domination even at a roughness-imposed minimum flying height. Here, the air-bearing domination means that both air-bearing force and air-bearing stiffness are larger than the combination of various short-range forces and the corresponding stiffness. Investigations presented in this paper indicate that high pressure and high-pressure concentration technology are effective approaches to extending the domination of air-bearing force towards such a roughness-limited possible minimum flying height. Slider designs, proposed by authors, exhibit satisfying flying height stability even at the roughness-limited minimum flying height
Sponsorship	IEEE Magnetics Society
Starting Page	715
Ending Page	720
Page Count	6
File Size	698322
File Format	PDF
ISSN	00189464
Volume Number	43
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rough surfaces Surface roughness Magnetic recording Lubricants Magnetic heads Stability criteria Memory Computer crashes Electrostatics Hard disks tribology Head–disk interface magnetic hard-disk drive magnetic recording short-range interaction forces
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Air-Bearing Design Towards Super Stable Head-Disk Interface

Dynamics of Partial Contact Head Disk Interface

Alternate air bearing slider designs for areal density of 1 Tb/in/sup 2/

Dynamics of Read/Write Head Positioning in Both Flying-Height and Off-Track Directions

Relationship of Adhesion/Friction Forces and Slider Vibration in Surfing-Recording HDI System

Tribological Challenges of Flying Recording Heads Over Unplanarized Patterned Media

Time Dependence of Head-Media Interference at Low Fly Heights

Flying height measurement while seeking in hard disk drives

Hard Disk Drive Reliability Modeling and Failure Prediction

Air-Bearing Design Towards Highly Stable Head–Disk Interface at Ultralow Flying Height

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Alternate air bearing slider designs for areal density of 1 Tb/in/sup 2/

Dynamics of Read/Write Head Positioning in Both Flying-Height and Off-Track Directions

Relationship of Adhesion/Friction Forces and Slider Vibration in Surfing-Recording HDI System

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