Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2011-04-05
2011-04-05
Tzeng, Fred (Department: 2627)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
Reexamination Certificate
active
07920346
ABSTRACT:
A method for testing performance of a magnetic head slider includes the steps of: (1) rotating the disk and positioning the slider over the rotating disk at an initial fly-height; (2) exciting the fly-height actuator to make the slider touch the disk and recording a touch down spacing of the read head of the slider; (3) backing off the slider at a predetermined backoff amount from the disk; (4) testing dynamic performance of the slider to obtain a reference value which is related to the spacing between the disk and the slider; (5) varying the initial fly-height of the slider; (6) repeating the steps (2) to (4) with the backoff amount fixed; and (7) calculating a dynamic fly-height gamma ratio based at least in part on the recorded touch down spacing and the obtained reference values.
REFERENCES:
patent: 5673156 (1997-09-01), Chen et al.
patent: 5991113 (1999-11-01), Meyer et al.
patent: 7119979 (2006-10-01), Fong et al.
patent: 7180692 (2007-02-01), Che et al.
patent: 7215495 (2007-05-01), Che et al.
patent: 7292401 (2007-11-01), Shen et al.
patent: 2005/0174665 (2005-08-01), Zhang et al.
Leung CheukWing
Tsang WaSze
Tse Man
Nixon & Vanderhye P.C.
SAE Magnetics (H.K. ) Ltd.
Tzeng Fred
LandOfFree
Method for testing performance of a magnetic head slider does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for testing performance of a magnetic head slider, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for testing performance of a magnetic head slider will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2688874