Patent ID: 7651908

Claim:
A method of fabricating an image sensor, comprising: forming a lower electrode on a substrate; forming an interlayer insulating film on the substrate, the interlayer insulating film having a capacitor hole to expose a first portion of the lower electrode; forming a dielectric film on at least the first portion of the lower electrode; forming a first contact hole through the interlayer insulating film to expose a second portion of the lower electrode; forming a first conductive layer in at least the first contact hole and the capacitor hole; forming a second conductive layer on the first conductive layer to fill and cover the capacitor hole and the first contact hole; and planarizing the second conductive layer to simultaneously form a capacitor plug in the capacitor hole, a first contact plug in the first contact hole, an upper electrode beneath the capacitor plug, and a first contact barrier film beneath the first contact plug.