Patent ID: 7476613

Claim:
A method of forming a contact in a semiconductor device having a substrate comprising the steps of: forming a plurality of conductive lines on the substrate, each conductive line comprising a first hard mask layer; forming an interlayer insulation layer on the substrate having the conductive lines; performing a first CMP process on the interlayer insulation layer to expose at least the top portion of the first hard mask layer of each conductive line; after performing the first CMP process, further removing a predetermined thickness of the interlayer insulation layer; after removing the predetermined thickness of the interlayer insulation layer, forming a second hard mask layer thereon; performing a second CMP process on the second hard mask layer to expose at least the top portion of the first hard mask layer of each conductive line such that a plurality of portions of the second hard mask layers is formed, each portion remaining between adjacent conductive lines; etching selected portions of the second hard mask layer by which a second hard mask pattern is formed and defines contact forming regions on the substrate; etching the interlayer insulation layers using the second hard mask pattern as an etch barrier to open the contact forming regions of the substrate; after etching the insulation layers using the second hard mask pattern as an etch barrier, depositing a conductive layer thereon filling the opened contact forming regions; and removing a predetermined thickness of the conductive layer and the second hard mask pattern to expose the first hard mask layer of each conductive line.