Patent ID: 9202786
Filing Date: 2015-12-01
Classification: H01L

Abstract:
1. A semiconductor device comprising: one or more metal plugs; a dual-damascene structure disposed over the one or more metal plugs, the dual-damascene structure comprising one or more vertical contacts electrically coupled to the one or more metal plugs, and a trench conductor disposed in a trench and electrically coupled to the one or more vertical contacts; wherein the one or more vertical contacts comprise a barrier material; wherein the trench conductor comprises a conductive material disposed on top of the barrier material; wherein the conductive material fills a full width of the trench; wherein the trench conductor does not comprise a barrier layer disposed on one or more sidewalls of the trench; wherein an interface between the barrier material and the conductive material is disposed within the trench; and wherein the barrier material covers the bottom surface of the trench and facilitates the formation of the trench conductor.