Patent ID: 9105739
Filing Date: 2015-08-11
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate; a first gate electrode and a second gate electrode formed over the semiconductor substrate; and a first insulating film formed between the first gate electrode and the semiconductor substrate, and between the first gate electrode and the second gate electrode, the first insulating film including therein a charge storage portion, wherein the first insulating film includes a first silicon oxide film in contact with a surface of the substrate, a silicon nitride film over the first silicon oxide film, and a second silicon oxide film over the silicon nitride film such that the silicon nitride film is located between the first silicon oxide film and the second silicon oxide film, and wherein metal elements are disposed between the silicon nitride film and the second oxide film in a manner that the metal elements are in contact with a planar surface of the silicon nitride film and embedded inside the second silicon oxide film, and are distributed at a surface density of 1×10