Patent ID: 6376368
Filing Date: 2002-04-23
Classification: H01L

Abstract:
A method of forming a contact structure of a semiconductor device, comprising:forming an insulating layer on a semiconductor substrate; forming a lower interconnection structure on a the insulating layer; forming an inter-dielectric layer on the insulating layer and the lower interconnection structure; forming a contact hole which exposes a predetermined region of the lower interconnection structure by patterning the inter-dielectric layer; forming a conformal semiconductor layer on the entire surface of the inter-dielectric layer including within the contact hole; forming an ohmic metal layer on the conformal semiconductor layer; forming a compound material layer by reacting the semiconductor layer with the ohmic metal layer, by thermally treating the ohmic metal layer; removing an unreacted ohmic metal layer, which does not react with the semiconductor layer upon the thermal treatment using a wet-etching polution; and forming a barrier metal layer on the entire surface of the resultant structure from which the unreacted ohmic metal layer has been removed.