Detecting head/disk contact in a disk drive using a...

Details Detecting head/disk contact in a disk drive using a... Detecting head/disk contact in a disk drive using a...

2006-04-10

2008-09-09

Nguyen, Hoa T. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07423830

ABSTRACT:
A disk drive having a heater element on the read/write head includes control circuitry to prevent head/disk contact by limiting power to the heater element. As the power to the heater element increases, thermal expansion reduces the fly height until head/disk contact occurs. During drive calibration, a maximum power level allowed to the heater element is determined by detecting heater power at a level where a parameter value such as motor current exceeds a threshold level.

REFERENCES:
patent: 5991113 (1999-11-01), Meyer et al.
patent: 6980383 (2005-12-01), Brunnett et al.
patent: 7027251 (2006-04-01), Darragh et al.
patent: 7158325 (2007-01-01), Hu et al.
patent: 7180692 (2007-02-01), Che et al.
patent: 7215495 (2007-05-01), Che et al.
patent: 7224548 (2007-05-01), Emo
patent: 7230780 (2007-06-01), Suk
patent: 7239470 (2007-07-01), Takahashi et al.
patent: 7239471 (2007-07-01), Tanabe
patent: 7286315 (2007-10-01), Ryu
patent: 7292401 (2007-11-01), Shen et al.
patent: 2005/0094316 (2005-05-01), Shiramatsu et al.
patent: 2006/0007594 (2006-01-01), Umehara et al.
patent: 2006/0119974 (2006-06-01), Yamazaki et al.
patent: 2006/0139789 (2006-06-01), Yang
patent: 2006/0285248 (2006-12-01), Pust et al.
patent: 2007/0035881 (2007-02-01), Burbank et al.
patent: 2007/0103808 (2007-05-01), Kiyono et al.
patent: 2007/0127147 (2007-06-01), Yokohata et al.
patent: 2007/0133118 (2007-06-01), Kajitani
patent: 2007/0171563 (2007-07-01), Pit
patent: 2007/0195449 (2007-08-01), Feist et al.
patent: 2007/0230018 (2007-10-01), Schreck et al.

Affiliated with

Also associated with

Rating

Detecting head/disk contact in a disk drive using a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detecting head/disk contact in a disk drive using a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detecting head/disk contact in a disk drive using a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3970007