Patent ID: 9159843
Filing Date: 2015-10-13
Classification: G11C,H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate; a first gate electrode formed in an upper part of the semiconductor substrate; a second gate electrode that is formed in an upper part of the semiconductor substrate and is adjacent to the first gate electrode; a first insulating film formed between the first gate electrode and the semiconductor substrate; and a second insulating film that is formed between the second gate electrode and the semiconductor substrate and between the first gate electrode and the second gate electrode, and that includes an electric charge accumulation part, wherein: the second gate electrode has a first metal film adjacent to the second insulating film and a first silicon film that is formed over the first metal film and is separated from the second insulating film via the first metal film; and a first metal oxide portion is formed in an upper end part of the first metal film.