Patent ID: 6984585
Filing Date: 2006-01-10
Classification: B82Y,H01F,H01L

Abstract:
1. A method for removal of residues after plasma etching of a substrate comprising a film stack containing a patterned photoresist material layer, an anti-reflective coating layer, a sacrificial layer, a conductive layer, and a magnetic layer, the method comprising: a first plasma etching of the anti-reflective coating, conductive and sacrificial layers of the substrate; stripping the photoresist material layer and the anti-reflective coating layer from the substrate; a second plasma etching of the magnetic layer of the substrate; and treatment of the substrate in a buffered oxide etch wet dip solution to remove residue formed during the first and second plasma etching steps and to remove the sacrificial layer, wherein the buffered oxide wet dip solution is comprised of hydrogen fluoride and ammonium fluoride.