Patent ID: 7105474
Filing Date: 2006-09-12
Classification: C11D

Abstract:
1. An organic stripping composition comprising a first compound including a hydroxyl ion (OH − ), a second compound including a fluorine ion (F − ) and a sufficient amount of nitric acid and a mixture of: 75–86% by volume of dimethylacetamide; 5–15% by volume of water; and 2–15% by volume of acetic acid, ammonium hydroxide, and hydrofluoric acid, wherein the ratio of nitric acid to the mixture ranges from about 1:200 to about 1:250, to control the pH of the composition within the range of from about 6.5 to about 8.0, and wherein the organic stripping composition removes remaining residues after dry etching and/or ashing and prevents pitting of an Si layer and/or damage to a layer including at least one material selected from the group consisting of W, Al, Ti, TiN, and CoSi.