Patent ID: 9514946
Filing Date: 2016-12-06
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a semiconductor substrate; a gate insulating film for a memory element which is formed over the semiconductor substrate; and a gate electrode for the memory element which is formed over the gate insulating film, wherein the gate insulating film includes a first insulating film, a second insulating film over the first insulating film, and a laminate including a third insulating film on the second insulating film, a fourth insulating film on the third insulating film, and a fifth insulating film on the fourth insulating film, wherein the gate insulating film has only one charge storage portion, the one charge storage portion comprising the second storage film, wherein the laminate is in contact with the second insulating film and the gate electrode, and wherein a band gap of each of the first and third insulating films is larger than a band gap of the second insulating film, a band gap of the fourth insulating film is smaller than the band gap of the third insulating film, and a band gap of the fifth insulating film is smaller than the band gap of the fourth insulating film.