Patent ID: 6583490
Filing Date: 2003-06-24
Classification: G11C,H01L

Abstract:
A semiconductor nonvolatile memory device having at least one memory cell, wherein the memory cell comprisesan impurity region of a first conductivity type formed in a semiconductor substrate, a first insulating film formed on the semiconductor substrate covering the impurity region, an opening formed in the first insulating film so as to reach the impurity region, and a program portion comprising a first semiconductor layer of the first conductivity type, a second insulating film, and a second semiconductor layer of a second conductivity type, the first semiconductor layer, the second insulating film and the second semiconductor layer being successively stacked in the opening, the first semiconductor layer being formed on the impurity region, the second insulating film being changed in a conductive state in response to a program data to thereby electrically connect between the first and second semiconductor layers, wherein said second insulating film is on said first semiconductor layer, and said second semiconductor layer is on said second insulating film, and wherein said second insulating film is in contact with said first semiconductor layer, and said second semiconductor layer is in contact with said second insulating film.