Patent ID: 7832090
Filing Date: 2010-11-16
Classification: H01L,Y10T

Abstract:
1. A method for forming a planar surface, comprising: providing a dielectric layer including a first planar surface having an opening formed therein and an electrically conductive structure positioned in the opening, the electrically conductive structure including a first non-planar surface disposed below the first planar surface by a first distance; depositing an adhesion layer on the first planar surface to a first thickness that is approximately two times the first distance or more, the adhesion layer completely filling the opening and conformally covering the first planar surface and the first non-planar surface, the adhesion layer is non-planar and includes a dished region positioned approximately above the opening and recessed by a second distance; chemically and mechanically polishing (CMP) the adhesion layer to form a planar adhesion layer by halting the polishing when the dished region is removed and the adhesion layer is planar.