Master information carrier and method for manufacturing...

Details Master information carrier and method for manufacturing... Master information carrier and method for manufacturing...

2005-12-27

2005-12-27

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Record copying

Contact transfer

C360S016000

Reexamination Certificate

active

06980380

ABSTRACT:
A master information carrier includes a high-level region and a low-level region that are formed on a non-magnetic base. The high-level region includes a ferromagnetic thin film pattern that corresponds to preformat information signals. The master information carrier is brought into close contact with a magnetic disk by exhausting a gas from a hole of the magnetic disk to generate negative pressure in a space between the low-level region and the magnetic disk. In this case, to prevent deformation of the central portion of the master information carrier, an inner edge of the high-level region in the radial direction is extended to the vicinity of a hole edge of the magnetic disk so that a portion of the high-level region comes into contact with the vicinity of the hole edge. This configuration can improve the close contact between the master information carrier and the magnetic disk, thus achieving higher reliability of magnetic transfer recording.

REFERENCES:
patent: 5935674 (1999-08-01), Saito et al.
patent: 6347016 (2002-02-01), Ishida et al.
patent: 6762892 (2004-07-01), Hamada et al.
patent: 2002/0051307 (2002-05-01), Nishikawa et al.
patent: 0 915 456 (1999-05-01), None
patent: 10-40544 (1998-02-01), None
patent: 10-269566 (1998-10-01), None

Affiliated with

Also associated with

Rating

Master information carrier and method for manufacturing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Master information carrier and method for manufacturing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Master information carrier and method for manufacturing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3495780