Nonvolatile semiconductor memory device and IC memory card using

Details Nonvolatile semiconductor memory device and IC memory card using Nonvolatile semiconductor memory device and IC memory card using

1998-12-14

2000-06-13

Nguyen, Viet Q.

Static information storage and retrieval

Floating gate

Multiple values

36518501, 36518529, 36518533, G11C 1604

Patent

active

06075723&

ABSTRACT:
A nonvolatile semiconductor memory device capable of being changed in method of use according to its application and in addition having a high reliability and an IC memory card using the same. An IC memory card is provided with multi-level type flash memory chips and a controller as principal constituent elements and constituted so as to allow free selection of plurality of operation modes according to the application, that is, use where a storage capacity is large, but there is a reduction in the write/erase speed or the guaranteed number of the repeated rewrites or use where the storage capacity is small, but there is no reduction in the write/erase speed or the guaranteed number of the repeated rewrites.

REFERENCES:
patent: 5594691 (1997-01-01), Bashir
patent: 5815443 (1998-09-01), Sweha et al.
patent: 5828616 (1998-10-01), Bauer et al.
patent: 5901299 (1999-05-01), Anmilli et al.
M. Bauer, R. Alexis, et al.; A Multilevel-Cell 32MB Flash Memory; pp. 132-133; 1995 IEEE International Solid-State Circutis Conference.

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