Static information storage and retrieval – Radiant energy – Color centers
Patent
1987-10-23
1989-08-08
Popek, Joseph A.
Static information storage and retrieval
Radiant energy
Color centers
G11C 1304
Patent
active
048559512
ABSTRACT:
A desired portion of information stored in the form of holes using hole burning phenomena is erased by irradiating a desired portion of a recording medium with light so as to erase desired holes. In this way it is possible to erase selectively only desired information among information stored in a PHB memory and further to rewrite information in the portion, where information has been erased.
REFERENCES:
patent: 3896420 (1975-07-01), Szabo
patent: 4101976 (1978-07-01), Castro et al.
Imazeki Shuji
Ojima Masahiro
Taniguchi Yoshio
Terao Motoyasu
Tomioka Yasushi
Hitachi , Ltd.
Popek Joseph A.
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