Patent ID: 7939879

Claim:
A semiconductor device comprising a single nonvolatile memory cell, wherein the single nonvolatile memory cell includes: a first region formed in a semiconductor substrate and serving as one of a source region and a drain region; a second region formed in the semiconductor substrate and serving as another of the source region and the drain region; an active region serving as a channel forming region and formed in the semiconductor substrate, in a first direction, between the first region and the second region; a first gate electrode formed on a first part of the active region through a first insulator film; a second gate electrode formed on a sidewall of the first gate electrode and on a second part of the active region through a second insulator, wherein the first gate electrode and the second gate electrode are arranged, in the first direction, side by side in the active region such that the first part is positioned, in the first direction, between the first region and the second part and such that the second part is positioned, in the first direction, between the first part and the second region, and wherein a plurality of crystalline grains are formed between the first part and the first gate electrode.