Method of erasable recording and reading of information

Details Method of erasable recording and reading of information Method of erasable recording and reading of information

1987-10-21

1990-10-02

Sikes, William L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369101, G11B 700

Patent

active

049611780

ABSTRACT:
This invention relates to a method of writing, erasing, and reading of a large volume, high-density information. The writing is accomplished by ionizing an element different from a substrate element, and scanning the substrate by a focused ion beam of the ionized element for depositing the atoms of the ionized element on or implanting them into the surface layer of the substrate in accordance with an information signal. The erasing is done by sputtering to scatter the written element existing on the substrate with a focused ion beam of another element. The reading is accomplished by scanning the substrate with a focused electron beam, and detecting a difference in the intensity of energy spectrum of the scattering electrons, secondary electrons and Auger electrons emitted by the element of the substrate and the written element.

REFERENCES:
patent: 4088895 (1978-05-01), Martin
patent: 4090253 (1978-05-01), Salgo
patent: 4130891 (1978-12-01), Kirkpatrick et al.

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