Patent ID: 8472238
Filing Date: 2013-06-25
Classification: G11C,H01L

Abstract:
1. A variable resistance nonvolatile storage device comprising: a semiconductor substrate; a nonvolatile storage element including: a first electrode; a second electrode; and a variable resistance layer in which a resistance value reversibly varies between a high resistance state and a low resistance state based on electrical signals each having a different polarity, said variable resistance layer being interposed between said first and second electrodes and provided in contact with said first and second electrodes, and the electrical signals being applied between said first and second electrodes; and an N-type MOS transistor including: a first N-type diffusion layer region formed on a main surface of said semiconductor substrate; a gate; and a second N-type diffusion layer region formed on a side of said gate which is opposite to said first N-type diffusion layer region, wherein said variable resistance layer includes an oxygen-deficient oxide of a transition metal, said first and said second electrodes are made of materials of different elements, a standard electrode potential V said first electrode is connected with said first N-type diffusion layer region of said N-type MOS transistor to form a memory cell.