Patent ID: 7510944
Filing Date: 2009-03-31
Classification: H01L

Abstract:
1. A method of forming a metal-insulator-metal (MIM) capacitor structure in conjunction with the formation of a resistor structure that includes a TiW layer and a resistor oxide layer formed on an upper surface of the TiW layer, the method comprising: forming a trench in the resistor oxide layer to expose a first surface area of the TiW layer; forming a layer of capacitor dielectric material over the resistor oxide layer, sidewalls of the trench and the exposed first surface area of the TiW layer; forming a via that extends through the capacitor dielectric layer and the resistor oxide layer to expose a second surface area of the TiW layer; forming a layer of Ti/TiN over the capacitor dielectric material, sidewalls of the via and the exposed second surface area of the TiW layer; forming a first W plug in the trench and a second W plug in the via; and forming a metal interconnect structure that includes a first metal interconnect in electrical contact with the first W plug and a second metal interconnect in electrical contact with the second W plug, whereby the TiW layer provides the bottom plate of the MIM capacitor structure and the Ti/TiN layer provides the top plate of the MIM capacitor structure.