Patent ID: 6188135
Filing Date: 2001-02-13
Classification: H01L

Abstract:
An electrical connector in an integrated circuit comprising:a silicon substrate,a first insulating layer, having a top surface and a bottom surface formed on said substrate,a trench formed in said first insulating layer having a top, walls and a bottom trench surface,a first barrier layer formed in said trench on said walls and on said bottom trench surface, said first barrier layer being thin with respect to the depth of said trench,a copper connector formed in said trench on said first barrier layer, said copper connector having an upper surface and a lower surface formed such that said top surface of said copper connector is at the level of the top surface of said first insulating layer and said lower surface of said copper connector is a distance above the bottom surface of said first insulating layer, whereby said first interface is formed between said copper connector and said first insulating layer,said first barrier layer comprising an interface between said copper connector and said first insulating layer,a second, insulating, barrier layer formed on said upper surface of said copper connector and formed on said top surface of said first insulating layer, anda second insulating layer formed on said second barrier layer.