Performance test method of head gimgal assembly with precise...

Details Performance test method of head gimgal assembly with precise... Performance test method of head gimgal assembly with precise...

2006-01-24

2006-01-24

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S076000, C360S077020, C360S077040, C360S077060, C360S078050, C324S210000, C324S212000

Reexamination Certificate

active

06989949

ABSTRACT:
A method of testing a performance of the HGA has a step of writing information from the at least one thin-film magnetic head element onto a magnetic disk with driving the actuator for displacement by applying an alternating drive signal to the actuator, a step of reading out the information of at least one rotation of the magnetic disk by the at least one thin-film magnetic head element without driving the actuator for displacement, a step of storing the information read-out from the magnetic disk as a read-out information along a disk-rotating direction, a step of moving the HGA toward an off-track direction by a predetermined distance, a step of repeatedly executing the reading, storing and moving steps to obtain two-dimensional read-out information along the disk-rotating direction and the off-track direction, and a step of determining, from the two-dimensional read-out information, an off-track position where the read-out information becomes maximum at each position along the disk-rotating direction, the determined off-track positions being recognized as displaced positions of the actuator in response to the applied alternating drive signal.

REFERENCES:
patent: 5745319 (1998-04-01), Takekado et al.
patent: 5998994 (1999-12-01), Mori
patent: 6061201 (2000-05-01), Woods
patent: 6292317 (2001-09-01), Alexander
patent: 6512647 (2003-01-01), Quak et al.
patent: 8-180623 (1996-07-01), None
patent: 2001-118256 (2001-04-01), None

Affiliated with

Also associated with

Rating

Performance test method of head gimgal assembly with precise... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Performance test method of head gimgal assembly with precise..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Performance test method of head gimgal assembly with precise... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3559306