Patent ID: 8258038

Claim:
A method of manufacturing a semiconductor memory, the method comprising: forming a stacked film above a substrate by stacking a reactive conductive material and a non-reactive conductive material; exposing a side surface of the stacked film; forming a projection by performing an insulator forming process on the reactive conductive material and the non-reactive conductive material on the exposed side surface of the stacked film to cause a predetermined length of a side surface of the reactive conductive material to change into an insulator such that a side surface of the non-reactive conductive material projects from the side surface of the reactive conductive material; forming a semiconductor layer covering the insulator and the projection; and forming a counter electrode covering the semiconductor layer, wherein the insulator forming process is: (i) an oxidation process which is one of oxygen plasma treatment, heat treatment under an oxygen atmosphere, contact processing using liquid oxidizing, and ozone exposure; or (ii) a nitridation process which is nitride plasma treatment, wherein the reactive conductive material is a material that undergoes a chemical reaction and changes into the insulator in the oxidation process or the nitride plasma treatment, wherein the non-reactive conductive material is a material that does not change into the insulator in the oxidation process or the nitride plasma treatment, wherein the reactive conductive material is: (i) at least one metal from among aluminum, copper, and magnesium; (ii) an alloy including at least one of aluminum, copper, and magnesium; or (iii) at least one of single-crystalline silicon or polycrystalline silicon that is doped with the alloy, and wherein the non-reactive conductive material is at least one of platinum, gold, and silver.