Patent ID: 6156644
Filing Date: 2000-12-05
Classification: H01L

Abstract:
A method of forming an interconnect for a semiconductor device, comprising the steps of:forming a dielectric layer on a lower conductive layer of the semiconductor device, the dielectric layer including a contact hole which exposes a portion of the lower conductive layer;forming a reaction control layer comprising a refractory metal compound on the dielectric layer opposite the lower conductive layer and on the exposed portion of the lower conductive layer; thenforming a reactive metal layer on the reaction control layer comprising a refractory metal compound;reacting the exposed portion of the lower conductive layer with the reactive metal layer, through the reaction control layer comprising a refractory metal compound, to form an ohmic contact in the contact hole on the exposed portion of the lower conductive layer;removing the reactive metal layer from the dielectric layer opposite the lower conductive layer; andforming an upper conductive layer on the ohmic contact; wherein the exposed portion of the lower conductive layer comprises silicon or metal silicide.