NDLI: Direct observation of padded slider tipping using the MRE cooling effect

Content Provider	IEEE Xplore Digital Library
Author	Xinwei Li Huan Tang Jing Gui
Copyright Year	1965
Abstract	The padded slider is a necessary design to extend the contact start-stop (CSS) solution to the regime of ultra-low head-disc spacing required for high areal density recording. In the design of a padded slider, the rear-most pads are recessed by an adequate amount from the slider trailing edge (TE), in order for the pads not to protrude below the read/write elements during flying. Such a geometry permits the head to rest on the disc in a tipped state, i.e., resting on its rear-most pads and the air-bearing surface TE. This may lead to stiction failure, as large high-pressure menisci may be formed underneath the nonpadded air-bearing surface near the TE. The occurrence of head tipping, while indirectly verified in earlier backward-forward disc rotation experiments, has never been directly observed. An elegant approach to directly monitor head tipping is to use the magneto-resistive element (MRE) cooling effect. The MRE is at a substantially higher temperature than the surrounding environment when a sensing current is passing through it. When a head with padded slider tips backward, its MRE is brought into close proximity to the disc surface, which leads to increased cooling of the MRE and, hence, a decrease in its resistance. Thus, by implementing a MRE resistance sensor, we have achieved the capability to determine the exact resting state of a padded slider, i.e., tipped or untipped, prior to each CSS cycle. Furthermore, by simultaneously monitoring the MRE resistance and stiction, we are able to conclusively establish the causal relationship between tipping and stiction failure of a padded slider interface.
Sponsorship	IEEE Magnetics Society
Starting Page	2105
Ending Page	2107
Page Count	3
File Size	191290
File Format	PDF
ISSN	00189464
Volume Number	38
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cooling Tellurium Magnetic heads Surface resistance Cascading style sheets Rough surfaces Surface roughness Surface texture Friction Geometry
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

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