Patent ID: 6316351
Filing Date: 2001-11-13
Classification: H01L

Abstract:
A method of using a novel inter-metal dielectric tric (IMD) film composition in a dual damascene process comprising the steps of:providing a semiconductor substrate having a substructure comprising devices formed therein, and metal layers and insulative layers formed thereon;forming a passivation layer over said substrate;forming a first fluorinated silicate glass (FSG) layer by reacting SiH4+N2O+CF4 over said passivation layer;forming an organic etch-stop layer over said first FSG layer;forming a second FSG layer, followed by an antireflective coating (ARC) layer over said organic etch-stop layer;forming a dual damascene structure comprising a composite hole pattern and a line trench pattern in said first and second FSG layers, respectively; anddepositing metal in said structure and removing excess metal to complete the forming of the dual damascene of the present invention.