Patent ID: 7465650

Claim:
A method of forming a polysilicon-comprising plug, comprising: providing a semiconductor substrate and an electrically insulative material over the substrate; forming an opening completely through the insulative material and uncovering an electrically conductive surface of the substrate through the opening; forming polysilicon within the opening to less than fill the opening and comprise a crevice therein, the polysilicon directly touching the insulative material and the conductive surface; conductively doping the polysilicon with a conductivity enhancing impurity; after doping the polysilicon, exposing the polysilicon within the opening to an H 2 -comprising atmosphere and a temperature of from 900° C. to 1100° C. and removing the crevice, the exposing forming at least one sealed void within the polysilicon from the crevice and accomplishing a dopant activation anneal; and after the exposing, forming metal within the opening over and directly touching the polysilicon containing the at least one sealed void, the polysilicon within the opening not being exposed to N 2 prior to forming the metal and the polysilicon and metal forming a conductive contact plug in electrical connection with the conductive surface of the substrate.