Abstract:
A MOS semiconductor device comprising an active area (1) of semiconductor material is described. The active area (1) comprises a central part (10) and an edge (9) having a inclined surface with respect to the central part (10). The MOS device comprises a gate finger (2) placed over of the central part (10) of said active area and formed by an insulating material layer (11) adjacent to the active area (1) and a conductive material layer (20) over said insulating material layer (11). The MOS device comprises at least one first pair of prolongations (51, 61, 71, 72) of said gate finger (2) which derive from both its opposite sides (49) transversal to the formation of the channel under the gate finger (2) and which fmd in a direction substantially parallel to the formation of said channel. Said first pair of prolongations (51, 61, 71, 72) are placed over portions (48) of the edge (9) of the active area (1) which are parallel to the formation of said channel and over their adjacent portions (21) of the central part of the active area (1).
Abstract:
Non-volatile, electrically alterable semiconductor memory, comprising at least one two-dimensional array of memory cells with a plurality of rows (R0-R511) and a plurality of columns (C(0;0)-C(127;31)), column selection means (CADD,3;CADD,10,INT_CADD,3) for selecting columns among said plurality of columns, and a write circuit (7) for simultaneously writing a first number of memory cells. A plurality of doped semiconductor regions (40-4127) is provided, extending transversally to the rows and subdividing a set of memory cells of each row in a corresponding plurality of subsets of memory cells, each subset of memory cells including memory cells of the row formed in a respective doped semiconductor region distinct from the remaining doped semiconductor regions and defining an elementary memory block (P) that can be individually erased. The plurality of doped semiconductor regions define a plurality of column packets (C(0;0)-C(0;31),...,C(127;0)-C(127;31)) each one containing a second number of columns equal to or higher than said first number, memory cells (MC) belonging to columns of a same column packet being formed in a same doped semiconductor region distinct from the doped semiconductor regions in which memory cells belonging to columns of the other column packets are formed. The column selection means are such that within each column packet columns containing memory cells that can be written simultaneously by the write circuit are distributed among the columns of the column packet so as to be at the substantially maximum distance from each other allowable within the column packet.
Abstract:
Chip Outline Band (COB) structure for an integrated circuit integrated in a semiconductor chip having a semiconductor substrate (1) of a first conductivity type and biased at a common reference potential (GND) of the integrated circuit, the COB structure comprising a substantially annular region (3;30) formed in the substrate (1) along a periphery thereof, and at least one annular conductor region (40,60) superimposed on and contacting the substantially annular region (3;30), characterized in that said substantially annular region (3;30) is electrically connected at said common reference potential (GND).
Abstract:
The integrated device comprises, in combination: a first conductive region (6); a first insulating region (7) of dielectric material, covering the first conductive region; a first through region (15) of electrically conductive material, extending inside the first insulating region (7), and in direct electrical contact with the first conductive region (6); a second conductive region (10a), arranged above the first insulating region (7), in a position not aligned and not in contact with the first through region (15); a second insulating region (9) of dielectric material, covering the second conductive region (10a); a second through region (21) of electrically conductive material, extending inside the second insulating region (9) as far as the first through region (15), aligned and in direct electrical contact with the first through region; and a third conductive region (11a), arranged above the second insulating region (9), aligned and in direct electrical contact with the second through region (21).
Abstract:
Semiconductor device comprising a semiconductor layer (1) of a first type of conductivity, a gate oxide layer (4) superimposed to the semiconductor layer (1), at least one polysilicon region (11; 31) superimposed to the gate oxide layer (4), a first (13) and a second doped region (8,10; 13) of a second type of conductivity in the semiconductor layer (1). The first (13) and second doped region (8,10; 13) being spaced-apart in order to form a channel region therebetween, under the polysilicon layer (11; 31), and the first doped region (13) extends under a contact opening (14) obtained in the gate oxide layer (4) in correspondence of the polysilicon layer (11; 31), so that the polysilicon layer (11; 31) is electrically connected with the first doped region (13) through the contact opening (14).
Abstract:
Byte-switch structure for electrically erasable and programmable non-volatile memories, comprising a MOS transistor (3) having a drain electrode coupled to a respective metal control gate line (CGL), a source electrode coupled to a respective polysilicon byte control line (CG) which is connected to control gate electrodes of all the memory cells of a same memory byte or word and is formed in an upper polysilicon layer, and a gate electrode coupled to a respective word line (WL), said source and drain electrodes of the MOS transistor being respectively a first (5,5') and a second (9,9') doped regions of a first conductivity type formed in a semiconductor layer (15) of a second conductivity type at opposite sides of said respective word line (WL), characterized in that said first and second doped regions (5,5',9,9') are formed under said respective metal control gate line (CGL), and in that said polysilicon byte control gate line (CG) insulatively extends under said metal control gate line (CGL) to overlap said first doped region (5,5'), and contacts said first doped region (5,5') through a respective contact opening (17) in an underlying stack formed by an interpoly dielectric layer (14), a lower polysilicon layer (11) and an oxide layer (16).