Patent ID: 6323141
Filing Date: 2001-11-27
Classification: C23C,H01L

Abstract:
A method for forming a patterned reflective layer comprising:providing a substrate;forming over the substrate a blanket reflective layer;forming upon the blanket reflective layer an anti-reflective coating (ARC) layer formed employing a plasma enhanced chemical vapor deposition (PECVD) method employing a deposition gas composition comprising silane, nitrous oxide and argon;forming upon the blanket anti-reflective coating (ARC) layer a blanket photoresist layer;photoexposing and developing the blanket photoresist layer to form a patterned photoresist layer;etching, while employing a first etch method, the blanket anti-reflective coating (ARC) layer to form a patterned anti-reflective coating (ARC) layer while employing the patterned photoresist layer as a first etch mask layer;etching, while employing a second etch method, the blanket reflective layer to form the patterned reflective layer while employing at least the patterned anti-reflective coating (ARC) layer as a second etch mask layer.