Patent ID: 6440875
Filing Date: 2002-08-27
Classification: H01L

Abstract:
A method for forming a spacer layer comprising:providing a substrate; forming over the substrate a topographic feature; forming conformally over the topographic feature a second microelectronic layer formed of a second material having a second thickness; forming conformally upon the second microelectronic layer a first microelectronic layer formed of a first material having a first thickness, where the first material serves as an etch stop for the second material and the first thickness is less than the second thickness; etching, while employing a first anisotropic etch method, the first microelectronic layer to form a spacer mask layer upon the second microelectronic layer; and etching, while employing a second anisotropic etch method selective to the second material, the second microelectronic layer to form a spacer layer while employing the spacer mask layer as an etch mask layer.