Patent ID: 9299577
Filing Date: 2016-03-29
CPC Classification: H01J,H01L

Claim Text:
1. A method for etching a dielectric barrier layer disposed on a substrate, comprising: patterning a substrate having a dielectric bulk insulating layer disposed on a dielectric barrier layer using a hardmask layer disposed on the dielectric bulk insulating layer as an etching mask; exposing a portion of the dielectric barrier layer after removing the dielectric bulk insulating layer uncovered by the dielectric bulk insulating layer; removing the hardmask layer from the substrate; and subsequently etching the dielectric barrier layer exposed by the dielectric bulk insulating layer, wherein subsequently etching the dielectric barrier layer further comprises: performing a treatment process on the dielectric barrier layer; performing a remote plasma process in an etching gas mixture supplied into the etching processing chamber to etch the treated dielectric barrier layer disposed on the substrate; and performing a plasma annealing process to anneal the dielectric barrier layer to remove the dielectric barrier layer from the substrate.