Patent ID: 6228279
Filing Date: 2001-05-08
Classification: H01L

Abstract:
A process for etching an organic antireflective coating formed on a photoresist material using a high-density plasma source, comprising the steps of:introducing a fluorohydrocarbon-containing mixture into a reaction chamber, wherein the mixture includes C.sub.2 F.sub.6, a source of hydrogen selected from the group consisting of CH.sub.3 F, C.sub.2 HF.sub.5, and CH.sub.2 F.sub.2, and a diluent selected from the group consisting of Ar, He, and N.sub.2 ; andapplying the high-density plasma source to the reaction chamber containing the mixture, to etch the antireflective coating with a strong source of CF.sub.3 produced from the mixture.