Patent ID: 8647959

Claim:
A method of fabricating a semiconductor device, comprising: forming a bottom electrode material layer containing aluminum and copper on a substrate; forming an insulating material layer and a top electrode material on the bottom electrode material layer in sequence; forming a patterned photoresist layer on the top electrode material layer; using the patterned photoresist layer as a mask, performing an etching process to remove a portion of the top electrode material layer so as to form a patterned top electrode layer; removing the photoresist layer by an ashing process; performing an alloy process to the bottom electrode material layer after removing the patterned photoresist layer; and performing another etching process to pattern the insulating material layer and the bottom electrode material layer and to expose a portion of the bottom electrode material layer so as to form a patterned insulating layer and a patterned bottom electrode layer after performing the alloy process, wherein the patterned top electrode layer, the patterned insulating layer and the patterned bottom electrode layer together constitute a metal-insulator-metal capacitor.