Patent ID: 6143657
Filing Date: 2000-11-07
Classification: H01L,Y10S

Abstract:
A method of forming a via contact between a first copper conductor and a second copper conductor in a thin film electronic device with a copper plug interconnecting said first copper conductor and said second copper conductor comprising:forming a stop layer over said first copper conductor,forming a dielectric layer over said stop layer,patterning said dielectric layer and said etch stop layer to etch a hole therethrough down into first copper conductor leaving an exposed surface of said first copper conductor and exposed sidewalls of said dielectric layer and said etch stop layer,growing a copper germanium thin film at the base of said hole on the exposed surface of said first copper conductor,forming a barrier layer over, as follows:a) said copper germanium thin film,b) said dielectric layer, andc) said first copper conductor,said barrier layer forming a narrow via hole in said hole, andforming said second copper conductor including said copper plug over said barrier layer, said copper plug filling said narrow via hole.