NDLI: Nonuniform Distribution of Molecularly Thin Lubricant Caused by Inhomogeneous Buried Layers of Discrete Track Media

Content Provider	IEEE Xplore Digital Library
Author	Fukuzawa, K. Muramatsu, T. Amakawa, H. Itoh, S. Hedong Zhang
Copyright Year	1965
Abstract	A method of estimating the thickness distribution on a surface with inhomogeneous buried layers is presented. It revealed that the lubricant distributes nonuniformly on discrete track media (DTM). First, the estimation method was theoretically developed. To balance the disjoining pressures of the lubricants in the track and off-track regions, the lubricant takes different film thicknesses in the two regions because the regions consist of different materials and have different intermolecular interactions. Formulating the balance of the disjoining pressures by using the theory for intermolecular force, we obtained the thicknesses in the two regions. Next, the validity of the theoretical estimation was experimentally verified. When a nonpolar lubricant was applied to a nanometer-thick oxide layer on a silicon surface, which was locally fabricated by probe oxidation, AFM images showed that the lubricant height in the oxide region decreased and the thickness distribution agreed well with that predicted by theory. Using the developed theory, we estimated the lubricant thicknesses on DTM. Even if lubricant is uniformly applied onto the disk, it moves from the off-track to track regions due to the pressure balance. Thus, the theory predicts that the lubricant is thicker in the track regions than the off-track region at equilibrium.
Sponsorship	IEEE Magnetics Society
Starting Page	3663
Ending Page	3666
Page Count	4
File Size	352794
File Format	PDF
ISSN	00189464
Volume Number	44
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lubricants Nonhomogeneous media Estimation theory Magnetic materials Magnetic recording Dielectric materials Inorganic materials Organic materials Substrates Systems engineering and theory magnetic recording Discrete track media disjoining pressure head-disk interface lubricant
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Head–Disk Interface Materials Issues in Heat-Assisted Magnetic Recording

Taking a Fresh Look at Disjoining Pressure of Lubricants at Slider-Disk Interfaces

Lubricant Pickup of Ultra-Thin PFPE Lubricants With Different Backbone Structures

Fundamental Study of Vapor Lubrication by PFPE Lubricants in Hard Disk Drives

Planarization of Discrete Track Recording Media to Improve Flyability of Magnetic Recording Sliders

Experimental Study of Head-Disk Interface Instability on Light Contact Recording Using Dynamic Flying Height Control

Experimental Comparisons of Spreading and Replenishment Flows of Molecularly Thin Lubricant Films Coated on Magnetic Disks

Organic lubricant evaporation method, a new lubricating surface treatment for thin film magnetic recording media

Lubricant Thermodiffusion in Heat Assisted Magnetic Recording

Nonuniform Distribution of Molecularly Thin Lubricant Caused by Inhomogeneous Buried Layers of Discrete Track Media

Similar Documents

Head–Disk Interface Materials Issues in Heat-Assisted Magnetic Recording

Taking a Fresh Look at Disjoining Pressure of Lubricants at Slider-Disk Interfaces

Lubricant Pickup of Ultra-Thin PFPE Lubricants With Different Backbone Structures

Fundamental Study of Vapor Lubrication by PFPE Lubricants in Hard Disk Drives

Planarization of Discrete Track Recording Media to Improve Flyability of Magnetic Recording Sliders

Experimental Study of Head-Disk Interface Instability on Light Contact Recording Using Dynamic Flying Height Control

Experimental Comparisons of Spreading and Replenishment Flows of Molecularly Thin Lubricant Films Coated on Magnetic Disks

Organic lubricant evaporation method, a new lubricating surface treatment for thin film magnetic recording media

Lubricant Thermodiffusion in Heat Assisted Magnetic Recording

Nonuniform Distribution of Molecularly Thin Lubricant Caused by Inhomogeneous Buried Layers of Discrete Track Media