Patent ID: 8277674
Filing Date: 2012-10-02
Classification: H01L

Abstract:
1. A method of removing post-etch residues, comprising: providing a substrate covered by a isolation layer, a conductive layer embedded in the isolation layer and a dielectric layer and a hard mask positioned on the isolation layer and the conductive layer; performing an plasma etching process to etch the hard mask with ions so as to form a patterned hard mask and exposes part of the dielectric layer; rinsing the patterned hard mask and the dielectric layer with a solution containing conductive ions to remove charges accumulated on the patterned hard mask and the dielectric layer; and performing a remove process to remove a post-etch residue on the patterned hard mask and the dielectric layer after removing the charges accumulated on the patterned hard mask and the dielectric layer, wherein the post-etch residue does not react with the conductive ions.