Patent ID: 8779550

Claim:
An integrated circuit formed at a semiconductor surface of a body, including an electrically programmable capacitor structure for an analog semiconductor integrated circuit, the integrated circuit comprising: a first polysilicon electrode; a silicide-block film disposed over the first polysilicon electrode, the silicide-block film comprising a layer of silicon dioxide underlying a layer of silicon nitride; a capacitor dielectric film disposed over the silicide-block film, in direct contact with the silicon nitride layer of the silicide-block film; a first conductive plate, comprising a metal and formed in a conductor level, the first conductive plate disposed over a first portion of the first polysilicon electrode with the capacitor dielectric film therebetween; a second polysilicon electrode, having at least a portion clad with a metal silicide formed by direct reaction, and formed from the same polysilicon layer as the first polysilicon electrode; and a second conductive plate, comprising a metal and formed in the conductor level, the second conductive plate disposed over the clad portion of the second polysilicon electrode with the capacitor dielectric film therebetween, the capacitor dielectric film being in direct contact with the metal silicide of the clad portion of the second polysilicon electrode.