公开(公告)号：ITTO991098D0

公开(公告)日：1999-12-14

申请号：ITTO991098

申请日：1999-12-14

Applicant: ST MICROELECTRONICS SRL

Inventor： DE SANDRE GUIDO ,  PASOTTI MARCO ,  ROLANDI PIER LUIGI

IPC: G11C16/34

Abstract: The optimized soft programming method is used in a memory consisting of a plurality of cells that are grouped into sectors. The cells that belong to a single sector have gate terminals connected to a plurality of word lines, and drain terminals connected to a plurality of local bit lines. The soft programming method consists of selecting at least one local bit line in the sector, and simultaneously selecting all the word lines in the same sector. A corresponding gate voltage is applied to all the word lines, whereas a constant drain voltage, with a pre-determined value is applied to the local bit line.