Method for testing a micro-actuator in a magnetic tester

Details Method for testing a micro-actuator in a magnetic tester Method for testing a micro-actuator in a magnetic tester

2006-08-01

2006-08-01

Wellington, Andrea (Department: 2651)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S075000

Reexamination Certificate

active

07085083

ABSTRACT:
A system and method for testing the stroke and frequency response of a micro-actuator is disclosed. A dynamic parameter tester writes two concentric tracks on a noise free portion of a magnetic storage medium. A magnetic read/write head and a micro-actuator is positioned between the two concentric tracks. An initial oscillating voltage is applied at a first frequency to the micro-actuator while reading back a signal from the two concentric tracks. A stroke characteristic of the micro-actuator is calculated based in part on the read-back signal. The initial oscillating voltage is determined from previous tests. The first stroke characteristic of the micro-actuator is based on a time-averaged amplitude of the first signal. The two concentric tracks are written at a pre-determined pitch.

REFERENCES:
patent: 6801377 (2004-10-01), Kasajima et al.
patent: 2003/0103284 (2003-06-01), Cheng et al.

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