Methods of gray scale recording and archival memory target produ

Details Methods of gray scale recording and archival memory target produ Methods of gray scale recording and archival memory target produ

1977-08-08

1978-12-19

Fears, Terrell W.

Static information storage and retrieval

Read only systems

Semiconductive

307238, 365115, 365118, 365128, G11C 1140

Patent

active

041308913

ABSTRACT:
One of a multiplicity of data values is permanently recorded at each data site in a two-dimensional data site array defined upon the surface of a semiconductor diode target by implanting an auxiliary bit thereat having an associated one of a multiplicity of possible dopant concentrations, at a uniform implantation depth, or of different implantation depths, at a uniform doping concentration, into a fabricated layer of the diode, responsive to respectively controlling the fluence or the landing energy of a writing ion beam.

REFERENCES:
patent: 3763 (1973-10-01), 10001973
patent: 3698078 (1972-10-01), Redington

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