Patent ID: 6444588
Filing Date: 2002-09-03
Classification: G03F,H01L

Abstract:
A method of forming an anti-reflective coating material layer in the fabrication of integrated circuits, the method comprising:providing a substrate assembly having a surface; providing an inorganic anti-reflective coating material layer on the substrate assembly surface, wherein the inorganic anti-reflective coating material layer has an associated etch rate when exposed to an etchant, and further wherein the inorganic anti-reflective coating material layer is SixOyNz:H, where x is in the range of about 0.39 to about 0.65, y is in the range of 0.25 to about 0.56, and z is in the range of about 0.05 to about 0.14; using the inorganic anti-reflective coating material layer in a photolithographic process; and thermally treating the inorganic anti-reflective coating material layer formed thereon at a temperature in the range of about 400Â° C. to about 1100Â° C., wherein the thermally treated anti-reflective coating material layer has an associated etch rate of less than about 16 Ã¥ per minute when exposed to the etchant.