Patent ID: 7022246
Filing Date: 2006-04-04
Classification: H01L,Y10S,Y10T

Abstract:
1. A method for fabricating a MIMCAP (capacitor formal by successive layers of metal, insulator, metal) and a thin film resistor at the same level of an integrated multi-layer circuit, comprising: deposit a layer of oxide insulation, then deposit a layer of metal on top of the layer of oxide insulation to form a bottom electrode of the capacitor, then deposit a layer of dielectric on top of the layer of metal to form a dielectric of the capacitor; lithographic pattern and etch the dielectric and bottom electrode of the capacitor; deposit a layer of metal to form the top electrode of the capacitor on top of the capacitor dielectric and also to form the thin film resistor in a separate structure to one side of the capacitor, and deposit a nitride etch stop cap over the metal layer of the capacitor top electrode and the thin film resistor; lithographic pattern and etch the top electrode of the capacitor and the thin film resistor; deposit a layer of inter layer dielectric ILD over the top electrode of the capacitor and the thin film resistor, lithographic pattern and etch the ILD line level; deposit a layer of liner and a copper layer to form an integrated copper structure; chemical mechanical polish the integrated copper structure to form the final structure of the MIMCAP, wherein said final structure comprises an electrical wiring path to the MIMCAP and the thin film resistor through multiple metal layer lines, which comprise at least a first metal layer line that directly contacts the top electrode of the MIMCAP, a second metal layer line that directly contacts the bottom electrode of the MIMCAP, a third metal layer line that directly contacts one side of the thin film resistor, and a fourth metal layer line that directly contacts the other opposite side of the thin film resistor, and wherein said first, second, third, and fourth metal layer lines are located at the same metal level.