Patent ID: 8507380

Claim:
A method of forming contact openings in the fabrication of integrated circuitry, comprising: forming a mask comprising at least one of photoresist and amorphous carbon over a plurality of spaced conductive line constructions, the conductive line constructions comprising insulative caps and insulative sidewalls, the mask comprising a plurality of spaced lines and trench spaces between adjacent of the spaced lines, the spaced lines and the trench spaces angling relative to the conductive line constructions, the trench spaces being received over node locations received between adjacent of the conductive line constructions; treating the at least one of photoresist and amorphous carbon with a plasma to reduce lateral width of the spaced lines and to increase lateral width of the trench spaces, the plasma comprising chemically inert and chemically reactive components to said at least one of photoresist and amorphous carbon, the reducing of lateral width of the spaced lines occurring by greater physical removal than by chemical removal of said at least one of photoresist and amorphous carbon; and after the treating, etching contact openings to the node locations selectively relative to the insulative caps and the insulative sidewalls.