Patent ID: 8105947

Claim:
A method forming a via in a dielectric layer, comprising: providing a semiconductor structure having the dielectric layer overlying a conductor layer; forming a first antireflective coating (ARC) overlying the dielectric layer; forming a second ARC coating overlying the first antireflective coating; forming a photoresist layer over the second antireflective layer; patterning the photoresist layer; developing the photoresist layer to form areas covered by photoresist and exposed areas not covered by the photoresist corresponding to the patterning; etching the photoresist layer and the exposed areas to form via holes in the dielectric layer; removing the photoresist material and the second ARC coating; and re-capping the remaining first ARC coating with another ARC coating to form a re-capped ARC layer; wherein re-capping the remaining first ARC coating comprises forming a coating one selected from the group of SiC, SiCO, SiOH, SiO2, SiO, SiCH, SiN, and SiON.