Patent ID: 6368484
Filing Date: 2002-04-09
Classification: C25D,H01L

Abstract:
A method of electroplating a metal structure in a feature formed in a substrate, the substrate having a top surface, the feature having a bottom and sidewalls, the method comprising the steps of:depositing a liner on the top surface, bottom and sidewalls; depositing a seed layer of the metal on the liner; planarizing the seed layer to remove the seed layer from the liner on the top surface, so that the liner on the top surface is exposed and the seed layer is reduced to a portion in the feature on the sidewalls and on the bottom thereof; electroplating the metal using said portion of the seed layer and exposed portions thereof the liner, so that plated metal fills the feature, where the removal of the seed layer from the top surface causes no electroplating to occur on the top surface; planarizing the plated metal so that a top surface of the metal is planar with the liner exposed on the top surface; and planarizing the plated metal and the liner on the top surface so that the liner is removed from the top surface of the substrate, and the top surface of the metal is substantially planar with the top surface of the substrate.