Abstract:
A method for making semiconductor devices may include forming a phosphosilicate glass (PSG) layer on a semiconductor wafer, with the PSG layer having a phosphine residual surface portion. The method may further include exposing the phosphine residual surface portion to a reactant plasma to integrate at least some of the phosphine residual surface portion into the PSG layer. The method may additionally include forming a mask layer on the PSG layer after the exposing.