Patent ID: 7754668
Filing Date: 2010-07-13
Classification: C11D,G03F,H01L

Abstract:
1. A composition for cleaning microelectronic substrates consisting essentially of the following components: (a) at last one water-soluble or water-miscible organic solvent, (b) at least one unneutralized inorganic phosphorus-containing acid, and (c) water, and optionally (d) at least one surfactant, (e) at least one corrosion inhibitor, and (f) at least one metal chelating or complexing agent; wherein the composition is free of organic amines, hydroxylamines and strong bases that would neutralize the inorganic phosphorus-containing acid component and wherein the water-miscible organic solvent consists essentially of from about 35% to about 95% by weight of the composition and the weight ratio of the organic solvent component to the unneutralized inorganic phosphorus-containing acid component is in the range of from about 3:1 to about 40:1 and the water is present in the composition in an amount of from about 5% to about 10% based on the weight of the composition.