Back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive

Hard disk drives (HDD) are key components of typical computers. One of the important processes in hard disk drive manufacturing is the servo track writing. Servo sectors are typically created and are not subsequently overwritten or erased. The process of writing servo sector patterns is known as Se...

Full description

Saved in:

Bibliographic Details
Main Author:	Saidin, Mohamad Fadli
Format:	Thesis
Language:	English English
Published:	2014
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/14712/1/Back%20End%20Process%20Yield%20Improvement%20By%20Verification%20Of%20Seeder%20Bulk%20Erase%20Quality%20For%203.5%20Rework%20Hard%20Disk%20Drive%20%28Confidential%29%2024pages.pdf http://eprints.utem.edu.my/id/eprint/14712/2/Back%20end%20process%20yield%20improvement%20by%20verification%20of%20seeder%20bulk%20erase%20quality%20for%203.5%20rework%20hard%20disk%20drive.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utem-ep.14712
record_format	uketd_dc
spelling	my-utem-ep.147122022-11-30T15:33:25Z Back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive 2014 Saidin, Mohamad Fadli T Technology (General) Hard disk drives (HDD) are key components of typical computers. One of the important processes in hard disk drive manufacturing is the servo track writing. Servo sectors are typically created and are not subsequently overwritten or erased. The process of writing servo sector patterns is known as Servo Track Writing (STW). During the STW process, interaction between the software command and hardware performance normally will cause several errors and imperfection in the process. Thus, this kind of failures required the media of the HOD to be erased to ensure no overlapping tracks or any signal/noise residue after it tested again as rework HDD. This research studies the process of erasing the servo signal in the rework hard disk drive using the bulk erase technology in Western Digital Malaysia. This project observed the current practice on how the defected servo signal written drives analysed and reworked using bulk erase method in the factory and also the status of current production yield, particularly in Tressels program. The focus of this project is to improve the yield of filler back end process by implementation of T AA profiling gating algorithm in the HDS seeder software at STW stations. Result of experiments tested and discussed with several statistical analysis tools such as ANOYA and T-Test to verify the yield improvement. With failed drives filtered from going to filler station using the enhanced algorithm in the HOS production software, yield improvement at back end process achieved around two percent. 2014 Thesis http://eprints.utem.edu.my/id/eprint/14712/ http://eprints.utem.edu.my/id/eprint/14712/1/Back%20End%20Process%20Yield%20Improvement%20By%20Verification%20Of%20Seeder%20Bulk%20Erase%20Quality%20For%203.5%20Rework%20Hard%20Disk%20Drive%20%28Confidential%29%2024pages.pdf text en public http://eprints.utem.edu.my/id/eprint/14712/2/Back%20end%20process%20yield%20improvement%20by%20verification%20of%20seeder%20bulk%20erase%20quality%20for%203.5%20rework%20hard%20disk%20drive.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=92232 mphil masters Universiti Teknikal Malaysia Melaka Faculty of Mechanical Engineering Abd. Rahman, Md. Nizam
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Abd. Rahman, Md. Nizam
topic	T Technology (General)
spellingShingle	T Technology (General) Saidin, Mohamad Fadli Back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive
description	Hard disk drives (HDD) are key components of typical computers. One of the important processes in hard disk drive manufacturing is the servo track writing. Servo sectors are typically created and are not subsequently overwritten or erased. The process of writing servo sector patterns is known as Servo Track Writing (STW). During the STW process, interaction between the software command and hardware performance normally will cause several errors and imperfection in the process. Thus, this kind of failures required the media of the HOD to be erased to ensure no overlapping tracks or any signal/noise residue after it tested again as rework HDD. This research studies the process of erasing the servo signal in the rework hard disk drive using the bulk erase technology in Western Digital Malaysia. This project observed the current practice on how the defected servo signal written drives analysed and reworked using bulk erase method in the factory and also the status of current production yield, particularly in Tressels program. The focus of this project is to improve the yield of filler back end process by implementation of T AA profiling gating algorithm in the HDS seeder software at STW stations. Result of experiments tested and discussed with several statistical analysis tools such as ANOYA and T-Test to verify the yield improvement. With failed drives filtered from going to filler station using the enhanced algorithm in the HOS production software, yield improvement at back end process achieved around two percent.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Saidin, Mohamad Fadli
author_facet	Saidin, Mohamad Fadli
author_sort	Saidin, Mohamad Fadli
title	Back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive
title_short	Back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive
title_full	Back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive
title_fullStr	Back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive
title_full_unstemmed	Back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive
title_sort	back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty of Mechanical Engineering
publishDate	2014
url	http://eprints.utem.edu.my/id/eprint/14712/1/Back%20End%20Process%20Yield%20Improvement%20By%20Verification%20Of%20Seeder%20Bulk%20Erase%20Quality%20For%203.5%20Rework%20Hard%20Disk%20Drive%20%28Confidential%29%2024pages.pdf http://eprints.utem.edu.my/id/eprint/14712/2/Back%20end%20process%20yield%20improvement%20by%20verification%20of%20seeder%20bulk%20erase%20quality%20for%203.5%20rework%20hard%20disk%20drive.pdf
_version_	1776103077694144512

Back end process yield improvement by verification of seeder bulk erase quality for 3.5" reowrk hard disk drive

Similar Items