Patent ID: 7755136

Claim:
A nonvolatile semiconductor memory device with memory cells, each memory cell comprising; a semiconductor region having first conduction type; source and drain regions having second conduction type; a channel region formed between the source and drain regions; isolation regions formed in the semiconductor region; a tunneling insulating film formed on the channel region; a floating gate electrode formed on the tunneling insulating film, and made of a Si containing conductive material; a metal silicide film formed on the floating gate electrode; an inter-electrode insulating film formed on the metal silicide film, and made of rare-earth oxide, rare-earth nitride or rare-earth oxynitride; and a control gate electrode formed on the inter-electrode insulating film, wherein the thickness of the metal silicide film is equal to or more than a 3 atomic layer, and equal to or less than a 10 atomic layer.