Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Electron beam imaging
Patent
1985-10-16
1987-05-26
Kittle, John E.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Electron beam imaging
430 41, 430942, G03C 500, G03G 1300
Patent
active
046686096
ABSTRACT:
In the recording for a mass memory system by means of a plurality of electrostatic electron beam charges on an insulator storage medium comprising a dielectric material having a maximum secondary electron emission coefficient (.delta..sub.max) greater than one as a surface layer disposed on a conductive support the process of recording the individual transmission of charges at three distinguishable energy levels which provide uncharged spots and alternating negative and positive electrostatic charges in the pixels of the dielectric layer which alternating charges are effected by employing a primary beam energy greater than the lowest energy and less than the highest energy at which the secondary electron emission coefficient (.delta.) is unity for a positive charge and employing a primary beam energy less than the lowest energy or greater than the highest energy at which .delta. is unity for a negative charge.
REFERENCES:
patent: 3867192 (1975-02-01), Hermans et al.
patent: 4135926 (1979-01-01), Belli
patent: 4281050 (1981-07-01), Buckley et al.
patent: 4410614 (1983-10-01), Lelental et al.
GAF Corporation
Kittle John E.
Maue Marilyn J.
Ryan Patrick J.
Ward Joshua J.
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