Magneto-optical recording using a heating element

Details Magneto-optical recording using a heating element Magneto-optical recording using a heating element

2007-09-25

2007-09-25

Dinh, Tan (Department: 2627)

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

C369S013130

Reexamination Certificate

active

10893887

ABSTRACT:
A perpendicular magnetic recording medium for thermo-magnetic printing has an ultra-high recording density and is resistant to thermal decay of magnetization. An intermediate layer of the medium is provided between a first recording layer using a low-noise Co alloy ferromagnetic substance and a second recording layer using a ferrimagnetic substance (e.g., a rare-earth element-transition metal compound) having a compensation temperature below an operation ambient temperature. A magnetic field is applied thereto to form a magnetization pattern on the first recording layer. It is then heated-up to be printed onto the second recording layer, which has a higher coercivity at the ambient temperature, and a recording field is suitably set to form a magnetization pattern only on the first recording layer. The magnetization pattern is printed from the first recording layer to the second recording layer.

REFERENCES:
patent: 5051970 (1991-09-01), Ishii et al.
patent: 5233578 (1993-08-01), Yamamoto et al.
patent: 5237548 (1993-08-01), Muchnik
patent: 6507540 (2003-01-01), Berg et al.
patent: 6636460 (2003-10-01), Akiyama et al.
patent: 6762977 (2004-07-01), Gage et al.
patent: 6809908 (2004-10-01), Ito et al.
patent: 6952380 (2005-10-01), Isshiki et al.
patent: 6975564 (2005-12-01), Uchida et al.
patent: 7133230 (2006-11-01), Saga et al.
patent: 2005/0071859 (2005-03-01), Coehoorn et al.
patent: 63-276731 (1988-11-01), None
patent: 2-189751 (1990-07-01), None
J.J. Ruigrok et al, “Disk Recording Beyond 100 Gb/in.2: Hybrid Recording?”, Journal of Applied Physics, vol. 87, No. 9, May 1, 2000, pp. 5398-5403.
Y. Kanai et al, “Recording Field Analysis of Narrow-Track SPT Head with Side Shields, Tapered Main Pole, and Tapered Return Path for 1 Tb/in2”, IEEE Transactions on Magnetics, vol. 39, No. 4, Jul. 2003, pp. 1955-1960.
S. Iwasaki, “Perpendicular Magnetic Recording—Evolution and Future”, IEEE Transactions on Magnetics, vol. MAG-20, No. 5, Sep. 1984, pp. 657-662.

Affiliated with

Also associated with

Rating

Magneto-optical recording using a heating element does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magneto-optical recording using a heating element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-optical recording using a heating element will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3786472