Patent ID: 9012968
Filing Date: 2015-04-21
Classification: H01L

Abstract:
1. A semiconductor device comprising, a first memory cell and a second memory cell arranged in a first direction; the first memory cell including: a semiconductor substrate; a first gate insulating film formed over the semiconductor substrate; a first gate electrode formed over the first gate insulating film; a second gate insulating film including an insulating film for charge storage formed over the semiconductor substrate and over a side wall of the first gate electrode; and a second gate electrode formed over the second gate insulating film, adjacent with the first gate electrode through the second gate insulating film in the first direction, a first impurity region formed in the semiconductor substrate and positioned on a second gate electrode side, the second memory cell including: the semiconductor substrate; a third gate insulating film formed over the semiconductor substrate; a third gate electrode formed over the third gate insulating film; a fourth gate insulating film including the insulating film for charge storage formed over the semiconductor substrate and over a side wall of the third gate electrode; and a fourth gate electrode formed over the fourth gate insulating film, adjacent with the third gate electrode through the fourth gate insulating film in the first direction, the first impurity region positioned on a fourth gate electrode side, wherein the first gate electrode, the second gate electrode, the third gate electrode and the fourth gate electrode extend in a second direction perpendicular to the first direction, wherein the second gate electrode has a first portion extending toward the fourth gate electrode in the first direction, and wherein the fourth gate electrode has a second portion extending toward the second gate electrode in the first direction, and the second gate electrode and the fourth gate electrode are physically separated from each other.