Patent ID: 9093320
Filing Date: 2015-07-28
Classification: B82Y,G11C,H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate, a first gate electrode and a second gate electrode spaced along a first direction in a first main surface of the semiconductor substrate, a first gate insulation film formed between the first gate electrode and the semiconductor substrate, a second gate insulation film formed between the second gate electrode and the semiconductor substrate, a first insulation film formed over the first gate electrode, a second insulation film formed over the second gate electrode, a third gate electrode arranged opposite to the second gate electrode across the first gate electrode, and adjacent to the first gate electrode, a fourth gate electrode arranged opposite to the first gate electrode across the second gate electrode, and adjacent to the second gate electrode, a third gate insulation film formed between the third gate electrode and the semiconductor substrate, and between the first gate electrode and the third gate electrode, and including a first charge storage part in an inside portion of the third gate insulation film, and a fourth gate insulation film formed between the fourth gate electrode and the semiconductor substrate, and between the second gate electrode and the fourth gate electrode, and including a second charge storage part in an inside portion of the fourth gate insulation film, wherein the first gate electrode, the first gate insulation film, the first insulation film, the third gate electrode, and the third gate insulation film form a first memory cell, wherein the second gate electrode, the second gate insulation film, the second insulation film, the fourth gate electrode, and the fourth gate insulation film form a second memory cell, wherein in the first main surface, an end of the first insulation film on the second gate electrode side is situated closer to the third gate electrode side than a side surface of the first gate electrode on the second gate electrode side, and wherein in the first main surface, an end of the second insulation film on the first gate electrode side is situated closer to the fourth gate electrode side than a side surface of the second gate electrode on the first gate electrode side.