Patent ID: 8811058

Claim:
A resistance change element comprising: a semiconductor substrate; a first insulation film formed over the semiconductor substrate; a first electrode formed above the first insulation film and including a top surface, side surfaces and a bottom surface, the side surfaces including a first side surface provided at one end of the top surface and the bottom surface and a second side surface provided at the other end of the first top surface and the bottom surface; a second insulation film formed so as to being located above a part of the top surface of the first electrode and being in contact with the part of the top surface of the first electrode; a second electrode covering a part of the first insulation film, a part of the first side surface and the second side surface of the first electrode and a part of the second insulation film so that an upper surface, a third side surface and a fourth side surface of the second insulation film are directly in contact with the second electrode, the third side surface provided at one end of a lower surface of the second insulation film and the fourth side surface provided at the other end of the lower surface; a first oxide film, including a first oxide of the first electrode, formed between the first side surface of the first electrode and a fifth side surface of the second electrode provided on the side of the third side surface; and wherein the first oxide film includes a first resistance part whose resistance value changes in accordance with a voltage applied to the first and second electrodes, wherein the first oxide film is directly in contact with the part of the first side surface of the first electrode, the fifth side surface of the second electrode and the lower surface of the second insulating film.