Defect Detection Equalization Of Hard Disk Drive Media Test Process Using Variable Bias Implementation In Touch Down Sensor Response

The drive to satisfy the ever increasing need for digital storage capacity today has brought about various advances from a technological stand point in the design and manufacture of high speed and high capacity hard disk drives. Efforts to increase the areal density of the magnetic media disk within...

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Main Author:	Ramachandran, Ganesalingam
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TK1-9971 Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.usm.my/39385/1/GANESALINGAM_RAMACHANDRAN_24_Pages.pdf
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id	my-usm-ep.39385
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spelling	my-usm-ep.393852019-04-12T05:25:07Z Defect Detection Equalization Of Hard Disk Drive Media Test Process Using Variable Bias Implementation In Touch Down Sensor Response 2017 Ramachandran, Ganesalingam TK1-9971 Electrical engineering. Electronics. Nuclear engineering The drive to satisfy the ever increasing need for digital storage capacity today has brought about various advances from a technological stand point in the design and manufacture of high speed and high capacity hard disk drives. Efforts to increase the areal density of the magnetic media disk within the hard disk drive forced designers to push the envelope of the read/write head’s flying height clearance using Thermal or Dynamic Fly Height Control (DFH) down to the sub–nanometer region, thus giving birth to the need for improved magnetic media disk manufacturing processes. In order to fly the heads ever closer to the magnetic media surface, the media needed to be free of any protrusion or asperity type defects that could prove fatal to the drive, which in turn, was achieved through the use of the Touch Down Sensor. This research paper aims to address the variation that is present within the Touch Down Sensor application that employs the fixed bias implementation in the magnetic media test environment through the use of a variable bias solution. The amplitude response variation within the current implementation is scrutinized, and an alternative technique using a variable bias solution that is derived using an extrapolation of the amplitude response curve is discussed. The variable bias solution demonstrated that the variation of the Touch Down Sensor could be significantly be reduced by 36.7% and established a foundation where future research into this implementation could be explored 2017 Thesis http://eprints.usm.my/39385/ http://eprints.usm.my/39385/1/GANESALINGAM_RAMACHANDRAN_24_Pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Elektrik dan Elektronik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TK1-9971 Electrical engineering Electronics Nuclear engineering
spellingShingle	TK1-9971 Electrical engineering Electronics Nuclear engineering Ramachandran, Ganesalingam Defect Detection Equalization Of Hard Disk Drive Media Test Process Using Variable Bias Implementation In Touch Down Sensor Response
description	The drive to satisfy the ever increasing need for digital storage capacity today has brought about various advances from a technological stand point in the design and manufacture of high speed and high capacity hard disk drives. Efforts to increase the areal density of the magnetic media disk within the hard disk drive forced designers to push the envelope of the read/write head’s flying height clearance using Thermal or Dynamic Fly Height Control (DFH) down to the sub–nanometer region, thus giving birth to the need for improved magnetic media disk manufacturing processes. In order to fly the heads ever closer to the magnetic media surface, the media needed to be free of any protrusion or asperity type defects that could prove fatal to the drive, which in turn, was achieved through the use of the Touch Down Sensor. This research paper aims to address the variation that is present within the Touch Down Sensor application that employs the fixed bias implementation in the magnetic media test environment through the use of a variable bias solution. The amplitude response variation within the current implementation is scrutinized, and an alternative technique using a variable bias solution that is derived using an extrapolation of the amplitude response curve is discussed. The variable bias solution demonstrated that the variation of the Touch Down Sensor could be significantly be reduced by 36.7% and established a foundation where future research into this implementation could be explored
format	Thesis
qualification_level	Master's degree
author	Ramachandran, Ganesalingam
author_facet	Ramachandran, Ganesalingam
author_sort	Ramachandran, Ganesalingam
title	Defect Detection Equalization Of Hard Disk Drive Media Test Process Using Variable Bias Implementation In Touch Down Sensor Response
title_short	Defect Detection Equalization Of Hard Disk Drive Media Test Process Using Variable Bias Implementation In Touch Down Sensor Response
title_full	Defect Detection Equalization Of Hard Disk Drive Media Test Process Using Variable Bias Implementation In Touch Down Sensor Response
title_fullStr	Defect Detection Equalization Of Hard Disk Drive Media Test Process Using Variable Bias Implementation In Touch Down Sensor Response
title_full_unstemmed	Defect Detection Equalization Of Hard Disk Drive Media Test Process Using Variable Bias Implementation In Touch Down Sensor Response
title_sort	defect detection equalization of hard disk drive media test process using variable bias implementation in touch down sensor response
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Elektrik dan Elektronik
publishDate	2017
url	http://eprints.usm.my/39385/1/GANESALINGAM_RAMACHANDRAN_24_Pages.pdf
_version_	1747820745934766080

Defect Detection Equalization Of Hard Disk Drive Media Test Process Using Variable Bias Implementation In Touch Down Sensor Response

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