Patent ID: 6159836
Filing Date: 2000-12-12
Classification: H01L

Abstract:
A method for forming an integrated circuit contact structure, comprising the steps of:forming an insulating layer over a first patterned metal interconnect layer;forming an opening through the insulating layer to expose a portion of the first patterned metal interconnect layer;forming a first conductive layer including a refractory metal material over the insulating layer and in the opening;forming a low conductivity silicon layer over the first conductive layer;forming a second conductive layer over the low conductivity silicon layer;patterning the first and second conductive layers, and the low conductivity silicon layer, to form a programmable contact within the opening, the contact having side walls;forming insulating sidewall spacers surrounding the programmable contact; andforming a second metal interconnect layer over the programmable contact and in contact with the second conductive layer.