Browse Prior Art Database

Magnetic Recording Technique

IP.com Disclosure Number: IPCOM000098764D
Original Publication Date: 1959-Dec-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Hagopian, JJ: AUTHOR

Abstract

This technique permits recording on a ferromagnetic surface by bombardment of an electron beam.

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Magnetic Recording Technique

This technique permits recording on a ferromagnetic surface by bombardment of an electron beam.

A ferromagnetic tape 1 having a predetermined Curie temperature lower than that which may be generated by the bombardment of the electron beam is magnetized in a given direction by a head 2 and a current source 3. Localized bombardment of the tape 1 by an electron beam from tube 4, through window 5, causes temperatures in excess of the Curie temperature and subsequent loss of the bias magnetication. The demagnetized areas represent the recorded information.

The ferromagnetic surface may be arranged inside the tube. Photomissive, secondary electron emissive and electron mirror techniques may be used to reproduce recorded information from the ferromagnetic surface.

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