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:
Nov. 27, 2007
Filed:
Sep. 21, 2006
Chao Yuan Chen, San Jose, CA (US);
Shuyu Sun, Saratoga, CA (US);
Hoa Pham, San Jose, CA (US);
Sang Lee, Pleasanton, CA (US);
Chao Yuan Chen, San Jose, CA (US);
Shuyu Sun, Saratoga, CA (US);
Hoa Pham, San Jose, CA (US);
Sang Lee, Pleasanton, CA (US);
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
A calibration method for a fly on demand head of a hard disk drive. The method includes the steps of flying a head over a test track of a disk that is covered with a lubricant. A voltage is applied to a heating element of the head to move the head closer to the disk. The fly height of the head is then determined. The voltage can be incrementally varied until the head makes contact with the disk. This sequence can cause a modulated wear pattern in the lubricant of the disk. The voltage is terminated and the head is allowed to fly over the test track. The head is also moved to adjacent tracks on either side of the test track. A pressure gradient of the flying head moves the lubricant about the disk to mitigate the modulated wear pattern.