Programming method of the memory cells in a multilevel...

Details Programming method of the memory cells in a multilevel... Programming method of the memory cells in a multilevel...

2005-07-19

2005-07-19

Phan, Trong (Department: 2827)

Static information storage and retrieval

Floating gate

Multiple values

C365S185170

Reexamination Certificate

active

06920066

ABSTRACT:
A method for programming a non-volatile memory device of the multi-level type, includes a plurality of transistor cells grouped into memory words and conventionally provided with gate and drain terminals. The method applies different drain voltage values at different threshold values. Such values are directly proportional to the threshold levels to be attained by the individual memory word bits, and effective to provide for a simultaneous attainment of the levels, in a seeking-to manner, of the levels at the end of a limited number of pulses. Advantageously, a constant gate voltage value is concurrently applied to the gate terminals of said cells, such that the cell programming time is unrelated to the threshold level sought.

REFERENCES:
patent: 5553020 (1996-09-01), Keeney et al.
patent: 5555521 (1996-09-01), Hamada et al.
patent: 5708600 (1998-01-01), Hakozaki et al.
patent: 5790454 (1998-08-01), Choi
patent: 5796652 (1998-08-01), Takeshima et al.
patent: 5831901 (1998-11-01), Tang et al.
patent: 5970012 (1999-10-01), Takeshima
patent: 6404679 (2002-06-01), Guedj
patent: 6545909 (2003-04-01), Tanaka et al.
patent: 6807097 (2004-10-01), Takano et al.
patent: 2002/0064070 (2002-05-01), Yamazaki et al.
patent: 2002/124091 (2002-04-01), None
Ohkawa, M., et al., “A 98mm2 Die Size 3.3-V 64-Mb Flash Memory with FN-NOR Type Four-Level Cell,”IEEE Journal of Solid-State Circuits 31(11):1584-1589, Nov. 1996.

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