47.
    发明专利
    未知

    公开(公告)号:ITTO980516A1

    公开(公告)日:1999-12-13

    申请号:ITTO980516

    申请日:1998-06-12

    Abstract: The driving capability of a selection transistor is increased by an N-type implant at the source and drain regions of the selection transistor itself. This implant is conveniently made at the end of the self-aligned etching, using the same self-aligned etching mask defining the control gate regions and the floating gate regions of memory elements, keeping the circuitry area covered by a circuitry mask.

    48.
    发明专利
    未知

    公开(公告)号:ITMI981769D0

    公开(公告)日:1998-07-30

    申请号:ITMI981769

    申请日:1998-07-30

    Inventor: PIO FEDERICO

    Abstract: An electronic memory circuit comprises a matrix of EEPROM memory cells. Each memory cell includes a MOS floating gate transistor and a selection transistor. The matrix includes a plurality of rows and columns, with each row being provided with a word line and each column comprising a bit line organized in line groups so as to group the matrix cells in bytes, each of which has an associated control gate line. A pair of cells have a common source region, and each cell symmetrically provided with respect to this common source region has a common control gate region.

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