High density magnetic thermal recording and reproducing...

Details High density magnetic thermal recording and reproducing... High density magnetic thermal recording and reproducing...

1999-10-26

2001-05-15

Dinh, Tan (Department: 2651)

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

C360S059000, C369S126000

Reexamination Certificate

active

06233206

ABSTRACT:

INTRODUCTION TO THE INVENTION
The instant invention and application build upon concepts and apparatus disclosed in the cross-referenced application. A centerpiece of this cross-referenced application is the promulgation of a novel apparatus for writing/erasing high-density data on a digital recording media as a series of tags comprising a magnetic information bit pattern, the apparatus comprising:
1) a source of thermal radiation for generating an incident wave to the media;
2) means for applying a magnetic bias field on the digital recording media; and
3) means for coordinating a mutual positioning of the incident wave and the media for inducing a direct thermal coupling therebetween; the apparatus capable of writing/erasing said high-density data by at least one of the following actions:
i) using an information signal for modulating the magnetic bias field;
ii) using an information signal for modulating the power of the incident thermal wave to the media.
This apparatus for writing/erasing can realize important advantages, including providing data storage densities greater than that of diffraction limited systems, for example, data storage densities of approximately greater than 100 Gbit/inch
2
, and writing speeds approximately greater than 100 MHz. A preferred embodiment of this apparatus features a novel thermal near-field heater, especially configured for operation in a substantially thermal near-field mode.
SUMMARY OF THE INVENTION
As noted above, the present invention builds upon the just defined apparatus for writing/erasing, by adding to it, and incorporating within it, a read capability. This is a significant addition, for the following reasons.
First of all, the writer/reader of the present invention can realize a dual and independent capability or functionality, namely, a writer and/or a reader, and this, either sequentially or simultaneously.
Second, the writer/reader of the present invention can provide a simple and complete solution for testing magnetic recording, for example (and most profoundly), on the nanometer scale. To restate this last critical advantage—we know of no present technology, with particular reference to hard magnetic materials, which can enable the study of their properties on a nanometer scale.
Accordingly, we now disclose a novel assembly for writing/reading high density data on a recording media as a series of tags comprising a magnetic information bit pattern, the assembly comprising:
1) a magnetic bias field generator for applying a magnetic bias field on the media;
2) a thermal heater for generating and directing an incident thermal wave to the media;
3) a first controller for coordinating a mutual position of the incident thermal wave and the media for inducing a direct thermal coupling therebetween;
4) a magnetic sensor capable of reading written data on the media; and
5) a second controller for coordinating a mutual positioning of the magnetic sensor and the media; the assembly acting as a reader by operating the second controller; the assembly acting as a writer by operating the first controller and realizing at least one of the following actions;
i) using an information signal for modulating the magnetic bias field;
ii) using an information signal for modulating the power of the incident thermal wave to the media.


REFERENCES:
patent: 3716845 (1973-02-01), Chaffin, III
patent: 4343993 (1982-08-01), Binnig et al.
patent: 4731773 (1988-03-01), Lewkowicz
patent: 4747698 (1988-05-01), Wickramasinghe
patent: 4853810 (1989-08-01), Pohl et al.
patent: 5054936 (1991-10-01), Fraden
patent: 5130866 (1992-07-01), Klaassen et al.
patent: 5329122 (1994-07-01), Sakai et al.
patent: 5353268 (1994-10-01), Hintz
patent: 5391871 (1995-02-01), Matsuda et al.
patent: 5412597 (1995-05-01), Miyazaki et al.
patent: 5481527 (1996-01-01), Kasanuki et al.
patent: 5602820 (1997-02-01), Wickramasinghe
patent: 5650887 (1997-07-01), Dovek et al.
patent: 5732053 (1998-03-01), Yano et al.
patent: 5986978 (1999-11-01), Rottmayer et al.
patent: 6052249 (2000-04-01), Abraham et al.

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