Techniques for ultrahigh density writing with a probe on erasabl

Details Techniques for ultrahigh density writing with a probe on erasabl Techniques for ultrahigh density writing with a probe on erasabl

1995-08-31

2000-01-04

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

369126, 324203, 324213, G11B 502, G11B 900, G01R 3300, G01N 2782

Patent

active

060116641

ABSTRACT:
Techniques for ultrahigh density writing on an erasable magnetic medium include using a micromachined mechanism having two probes for writing to the medium. Use of the two probe embodiment eliminates the need to change the magnetic orientation of the probe. In another embodiment, a single probe is provided which is heated to the vicinity of its Curie temperature to enable the magnetic orientation of the probe to be switched. The probe may be heated to its Curie temperature through the use of a heating element or a focused laser. In another embodiment of the present invention, either the magnetic orientation of the probe or the magnetic orientation of the medium may be switched through the combination of a static magnetic field, a radio frequency magnetic field and, under certain circumstances, the magnetic field of the probe. In all cases, the writing techniques enable information to be written to a magnetic medium in a manner which enables the information to be erased and the medium rewritten.

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