Patent ID: 8633530
Filing Date: 2014-01-21
Classification: H01L

Abstract:
1. A semiconductor device having a memory cell, wherein the memory cell comprises: a first gate insulating film made of a first insulating film formed on a semiconductor substrate; a selection gate electrode made of a first conductive film formed on the first gate insulating film; a cap insulating film made of a second insulating film formed on the selection gate electrode; a memory gate electrode made of a second conductive film formed in a sidewall shape on one side surface of a stacked film made up of the cap insulating film and the selection gate electrode; and a second gate insulating film formed between the stacked film made up of the cap insulating film and the selection gate electrode and the memory gate electrode and formed also between the memory gate electrode and the semiconductor substrate, in a region in which a first plug supplying a voltage to the memory gate electrode is formed, an interlayer insulating film made of a third insulating film is provided on the semiconductor substrate, the cap insulating film and the memory gate electrode, and the first plug formed by embedding a third conductive film in a first contact hole formed in the interlayer insulating film is formed so as to be electrically connected to the memory gate electrode and cover a part of the cap insulating film.