| 摘要 |
A variable resistance element manufacturing method includes: forming a conductive plug in an interlayer insulating film on a substrate; planarizing an upper surface of the insulating film such that an upper part of the conductive plug protrudes from an upper surface of the insulating film by removing (i) a depression in the insulating film formed around the conductive plug and (ii) a depression in the insulating film formed across a plurality of conductive plugs; forming, on the insulating film and the plug, a lower electrode layer electrically connected to the plug; planarizing an upper surface of the lower electrode layer to remove a protruding part on the upper surface of the lower electrode layer; forming, on the lower electrode layer, a variable resistance layer; forming an upper electrode layer on the variable resistance layer; and forming a lower electrode, the variable resistance layer, and an upper electrode layer. |
