Patterned media magnetic recording disk drive with write...

Details Patterned media magnetic recording disk drive with write... Patterned media magnetic recording disk drive with write...

2008-03-26

2010-12-07

Wong, Kin C. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07848047

ABSTRACT:
A patterned-media magnetic recording disk drive compensates for circumferential misalignment of data island patterns among the data tracks as a result of errors in fabrication of the master template used to make the disks. Each data track on the disk has its pattern shifted from a generally radial or arcuate line by a certain amount of pattern circumferential misalignment (PCM). The disk drive includes a write clock where writing to the data islands is controlled by detection of synchronization marks by the read head, and circuitry to adjust the phase of the write clock to compensate for PCM. The phase difference between the data pattern of the selected data track where data is to be written and the data pattern of the track where the synchronization marks are being detected is the difference in their respective PCM values.

REFERENCES:
patent: 6421195 (2002-07-01), Rubin et al.
patent: 6738207 (2004-05-01), Belser et al.
patent: 6754017 (2004-06-01), Rettner et al.
patent: 6798594 (2004-09-01), Belser
patent: 2006/0193070 (2006-08-01), Bandic et al.
patent: 2003157507 (2003-05-01), None
Moritz et al., “Patterned Media Made From Pre-Etched Wafers: A Promising Route Toward Ultrahigh-Density Magnetic Recording”, IEEE Transactions on Magnetics, vol. 38, No. 4, Jul. 2002, pp. 1731-1736.

Affiliated with

Also associated with

Rating

Patterned media magnetic recording disk drive with write... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Patterned media magnetic recording disk drive with write..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Patterned media magnetic recording disk drive with write... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4198133