The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2009
Filed:
Jan. 31, 2007
Jae-hyeong Kim, Yongin-si, KR;
Yong-gwon Lee, Dongan-gu, KR;
Sang-hoon Chu, Giheung-gu, KR;
Cheol-hoon Park, Suwon-si, KR;
Jae-Hyeong Kim, Yongin-si, KR;
Yong-Gwon Lee, Dongan-gu, KR;
Sang-Hoon Chu, Giheung-gu, KR;
Cheol-Hoon Park, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
In a method of measuring track widths in a hard disk drive a plurality of estimation values are calculated based on differences in intensity between a plurality first measurement signals produced in relation to a head of the hard disk drive based on a plurality of burst signals stored in servo sectors of a track when the head moves along the track on a first side of a center of the track, and a plurality of second measurement signals produced in relation to the head of the hard disk drive based on the plurality of burst signals when the head moves along the track on a second side of the center of the track opposite the first side. The estimation values are then normalized, and excessive variation in the track widths is detected based on the normalized estimation values.