Patent ID: 9093641
Filing Date: 2015-07-28
Classification: H01L

Abstract:
1. A method of forming memory cells, comprising: forming metal-containing bottom electrodes over a semiconductor substrate; forming chalcogenide over the bottom electrodes, the chalcogenide comprising Ge and Sb; forming top electrode material over the chalcogenide; forming silicon nitride over the top electrode material, the silicon nitride being formed at a temperature of less than or equal to about 300° C.; etching through the silicon nitride, top electrode material and chalcogenide to form spaced apart memory cell structures, each of said structures having a cap of the silicon nitride thereover; the etching forming polymeric residue over the silicon nitride caps and along sidewalls of the spaced apart structures, and damaging chalcogenide along sidewalls of the structures; removing at least some of the polymeric residue with a solution comprising HF; and after removing said at least some of the polymeric residue, treating the sidewalls of the structures with one or both of H