Patent ID: 6017817
Filing Date: 2000-01-25
Classification: H01L

Abstract:
A method of fabricating dual damascene adapted to a substrate having an active region, comprising:successively forming a low k dielectric layer and a cap layer on the substrate;forming a first photoresist layer on the cap layer;patterning the cap layer using the first photoresist layer to expose a portion of the low k dielectric layer;removing the first photoresist layer and simultaneously forming a wiring line opening within the low k dielectric layer;forming a second photoresist layer on the cap layer to at least cover a portion of the wiring line opening while exposing a portion of the low k dielectric layer in the wiring opening is exposed;removing the second photoresist layer and simultaneously forming a via hole within the low k dielectric layer to expose the active region; andforming a metal layer to fill the wiring line opening and the via hole.