Patent ID: 6734116
Filing Date: 2004-05-11
Classification: H01L

Abstract:
A method for fabricating a microelectronic fabrication comprising:providing a substrate having formed therein a contact region; forming over the substrate and contacting the contact region an etch stop layer comprising: a first etch stop sub-layer formed from a comparatively low dielectric constant dielectric material; and a second etch stop sub-layer formed upon the first etch stop sub-layer and formed from a comparatively high dielectric constant dielectric material; forming over the etch stop layer an inter-metal dielectric layer having formed thereupon an anti-reflective coating layer; forming a patterned anti-reflective coating layer and a patterned inter-metal dielectric layer which define an aperture which reaches the etch stop layer at a location above the contact region; and removing the remaining anti-reflective coating layer to expose a top surface of the patterned inter-metal dielectric layer.