Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Reexamination Certificate
2005-12-27
2005-12-27
Chea, Thorl (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
C430S039000, C360S017000, C360S055000, C360S066000, C360S075000, C360S131000, C360S125330, C428S128000, C428S692100, C428S900000
Reexamination Certificate
active
06979524
ABSTRACT:
A method of forming a magnetic transition pattern in a longitudinal magnetic recording medium, comprising steps of:(a) providing a magnetic recording medium including a layer of a magnetic material having a surface comprised of a plurality of longitudinally extending magnetic domains;(b) contacting the surface of the layer of magnetic material with a topographically patterned imprinting surface of a stamper/imprinter formed of at least one high saturation magnetization, high permeability magnetic material; and(c) applying a unidirectional magnetic field perpendicular to the imprinting surface of the stamper/imprinter, the perpendicular magnetic field creating a longitudinal magnetic field component of sufficient strength to effect selective alignment of the magnetic domains of those portions of the layer of magnetic material which face the depressions of the imprinting surface while retaining the alignment of the magnetic domains of those portions of the layer of magnetic material which face the projections of the imprinting surface, the combination of portions forming a magnetic transition pattern replicating the topographical pattern of the imprinting surface.
REFERENCES:
patent: 5991104 (1999-11-01), Bonyhard
patent: 6347016 (2002-02-01), Ishida et al.
patent: 6807025 (2004-10-01), Benakli et al.
patent: 2002/0034107 (2002-03-01), Saito
Lee Shih-Fu
Leigh Joseph
Wago Koichi
Wang Li-Ping
Chea Thorl
Seagate Technology LLC
LandOfFree
Contact printing of longitudinal magnetic media with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Contact printing of longitudinal magnetic media with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contact printing of longitudinal magnetic media with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3470386