Patent ID: 7892968
Filing Date: 2011-02-22
Classification: H01L

Abstract:
1. A method comprising: forming a via opening in a dielectric material, the via opening aligned with a conductor; forming a line opening to the via opening; depositing an oxide coating over the dielectric material and in the via opening and the line opening; performing via gouging, wherein the via gouging process removes the oxide coating on a bottom of the via opening and reduces a thickness of the oxide coating on a bottom of the line opening; removing the oxide coating from all surfaces of the via opening and the line opening; filling the gouged via opening and the line opening with a metallic liner and at least one conductive material; and performing a planarization of the metallic liner and the at least one conductive material, wherein a top of the at least one conductive material is co-planar with a top of the dielectric material.