Patent ID: 6114259
Filing Date: 2000-09-05
Classification: H01L

Abstract:
A method for protecting exposed via sidewall surfaces of a low k carbon doped silicon oxide dielectric material on a semiconductor wafer, in order to protect said exposed surfaces of said low k carbon doped silicon oxide dielectric material from damage during removal of photoresist mask materials after etching of said low k carbon doped silicon oxide dielectric material through said photoresist mask to form said vias, which method comprises the steps of:(a) treating said exposed surfaces of low k carbon doped silicon oxide dielectric material with a plasma capable of forming a densified layer on and adjacent said exposed surfaces of low k carbon doped silicon oxide dielectric material to protect said exposed surfaces of low k carbon doped silicon oxide dielectric material during subsequent removal of said photoresist mask materials; and(b) then treating said semiconductor wafer with a mild oxidizing reagent comprising an H.sub.2 O vapor plasma sufficient to remove photoresist mask materials from said semiconductor wafer;whereby said exposed surfaces of said low k carbon doped silicon oxide dielectric material are protected from damage during said removal of said photoresist mask materials.