Patent ID: 8518296
Filing Date: 2013-08-27
Classification: C09G,C09K,H01L

Abstract:
1. A slurry for use in polishing a germanium-antimony-tellurium (GST) material, the slurry consisting essentially of: from about 1% by weight to about 2% by weight of a peroxide; from about 0.01% by weight to about 5% by weight of citric ammonium; from about 500 ppm to about 1000 ppm of benzotriazole; and from about 1% by weight to about 2% by weight colloidal silica abrasive particles, each of the colloidal silica abrasive particles having a particle size of about 30 nm or less; wherein the slurry exhibits selectivity for a germanium-antimony-tellurium material over a dielectric material.