Patent ID: 8673770
Filing Date: 2014-03-18
Classification: H01L

Abstract:
1. A method, comprising: forming a ULK material layer having a dielectric constant less than 2.7; forming a hard mask layer above said ULK material layer; forming a patterned photoresist layer above said hard mask layer; performing at least one etching process to define an opening in at least said ULK material layer for a conductive structure to be positioned in at least said ULK material layer; forming a fill material such that it overfills said opening while maintaining said patterned photoresist layer and said hard mask layer above said ULK material layer; performing a process operation to remove said patterned photoresist layer and to remove said fill material positioned outside of said opening; removing said fill material from within said opening; and after removing said fill material from within said opening, forming a conductive structure in said opening.