Patent ID: 8618523

Claim:
A semiconductor device, comprising: a semiconductor substrate; an interlayer insulating film formed over the semiconductor substrate; a lower electrode formed in the interlayer insulating film; a first insulating film formed directly on the lower electrode and the interlayer insulating film; a recording layer formed on the first insulating film and made of Geâ€”Sbâ€”Te based chalcogenide to which indium is introduced; and an upper electrode formed on the recording layer, wherein work function of the first insulating film is lower than work function of the chalcogenide, wherein the first insulating film is formed between the lower electrode and the recording layer, wherein the first insulating film has a laminated film of a first tantalum oxide layer and a tantalum layer, wherein a thickness of the first insulating film is 0.5 to 5 nm and is smaller than a thickness of the recording layer, and wherein a thickness of the tantalum layer is smaller than a thickness of the first tantalum oxide layer.