Patent ID: 7064380
Filing Date: 2006-06-20
Classification: G11C,H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; and a plurality of nonvolatile memory cells having a plurality of first electrodes provided over the semiconductor substrate, a plurality of second electrodes provided over the semiconductor substrate so as to cross with the plurality of the first electrodes, and a plurality of third electrodes for electric charge accumulation provided at positions which respectively lie between the plurality of the adjacent first electrodes and overlap with the plurality of the second electrodes in plan view, wherein the third electrodes are provided in a state insulated from the semiconductor substrate, the first electrodes, and the second electrodes each between the semiconductor substrate and the second electrodes, and each cross sectional shape of the third electrodes in a direction crossing with the principal surface of the semiconductor substrate is such a convex shape as to be larger in height than the first electrodes.