Method of erasing a flash memory

Details Method of erasing a flash memory Method of erasing a flash memory

1998-12-08

1999-11-23

Dinh, Son T.

Static information storage and retrieval

Floating gate

Particular biasing

36518522, 3651853, 365218, G11C 1604

Patent

active

059912065

ABSTRACT:
This invention discloses a method of erasing a flash memory, in which the method comprises: (A) erasing all cells of a selected sector; (B) verifying in cells whether the cells are erased; (C) saving an address corresponding to a non-erased cell and re-erasing the cells when the non-erased cell is detected by the step (B); (D) verifying in cells, from the saved address to the final address whether the cells are erased; and (E) executing a slight-program for recovering over-erased cells so that the cells of the sector are normally erased.

REFERENCES:
patent: 5172338 (1992-12-01), Mehrotra et al.
patent: 5400286 (1995-03-01), Chu et al.
patent: 5596530 (1997-01-01), Lin et al.
patent: 5663909 (1997-09-01), Sim
patent: 5831905 (1998-11-01), Hirano
patent: 5920508 (1999-07-01), Miyakawa et al.

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