Patent ID: 9245900
Filing Date: 2016-01-26
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a semiconductor substrate; a first gate electrode disposed above the semiconductor substrate; a second gate electrode disposed above the semiconductor substrate so as to be 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 formed between the second gate electrode and the semiconductor substrate and between the first gate electrode and the second gate electrode, the second insulating film having a charge accumulating part therein, wherein the second insulating film includes: a first film; a second film disposed on the first film and serving as the charge accumulating part; and a third film disposed on the second film, and the third film includes: a sidewall film positioned between the first gate electrode and the second gate electrode; and a deposited film having a first portion positioned between the second gate electrode and the semiconductor substrate, with a transverse portion of the second film being disposed between the first portion of the deposited film and the semiconductor substrate, a film thickness of the sidewall film in a gate-length direction being greater than a film thickness of the first portion of deposited film in a direction perpendicular to the gate-length direction, and the deposited film having a second portion positioned between the sidewall film and the second gate electrode.