Hard disk inspection method and system

Details Hard disk inspection method and system Hard disk inspection method and system

2006-04-04

2009-12-08

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

Checking record characteristics or modifying recording...

C360S013000

Reexamination Certificate

active

07630154

ABSTRACT:
A method an apparatus for testing the surface of hard disk platters having vertically oriented magnetic domains is disclosed. According to the method of the present invention, all of the magnetic domains on the surface of the disk to be tested are oriented in the same direction, so that the magnetic field intensity adjacent to the surface is ideally uniform. The surface is then scanned using a read head to identify perturbations in the magnetic field intensity which correlate to surface defects.

REFERENCES:
patent: 3761905 (1973-09-01), Hollstein et al.
patent: 5563746 (1996-10-01), Bliss
patent: 2002/0097640 (2002-07-01), Seo et al.
patent: 2006/0109000 (2006-05-01), Makino et al.

Affiliated with

Also associated with

Rating

Hard disk inspection method and system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hard disk inspection method and system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hard disk inspection method and system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4148302