Patent ID: 7880213
Filing Date: 2011-02-01
Classification: H01L

Abstract:
1. A bottom electrode of a metal-insulator-metal (MIM) capacitor, comprising: a solid nano-pattern area on a substrate, having a thickness and a bottom, wherein a material of the solid nano-pattern area is a transition metal; and a plurality of phase change areas on the substrate, dispersed in the solid nano-pattern area, wherein the thickness of the solid nano-pattern area is lower than that of the plurality of phase change areas, the bottom of the solid nano-pattern area and a bottom of the plurality of phase change areas are on the same level, and the plurality of phase change areas is made of a material phase-changed from the transition metal, wherein the solid nano-pattern area covers a portion of the substrate, and the phase change areas cover the substrate not covered by the solid nano-pattern area.