Patent ID: 6017614
Filing Date: 2000-01-25
Classification: H01L,Y10S,Y10T

Abstract:
A multilayer pasaivation layer over metal interconnections on a substrate comprised of:a patterned metal layer forming metal lines for said metal interconnections on said substrate;a multilayer passivation layer on said patterned metal layer comprised of;a first silicon oxide layer on said patterned metal layer thereby providing a stress-release layer,a first silicon nitride layer on said first silicon oxide layer as a buffer layer to minimize cracking;a second silicon oxide layer on said first silicon nitride layer that fills and seals any remaining cracks and pinholes in said first silicon nitride layer;a second silicon nitride layer on said second silicon oxide layer that provides a main passivation layer to protect said metal lines from moisture and corrosive chemicals, and said second silicon nitride layer having a thickness of between about 2500 and 5000 Angstroms.