Patent ID: 7709397
Filing Date: 2010-05-04
Classification: H01L

Abstract:
1. A method for etching a high-k dielectric layer on a substrate atop a substrate holder in a plasma processing system comprising: disposing a substrate on a substrate holder in a plasma processing system, wherein said substrate comprises a high-k dielectric layer and wherein said substrate further comprises SiO electrically biasing said substrate at a radio frequency (RF) voltage via the coupling of RF power to said substrate holder; elevating the substrate temperature above 200° C.; introducing a process gas to said plasma processing system, said process gas comprising one or more halogen-containing gases selected from the group consisting of HBr and Br igniting a plasma from said process gas; and exposing said substrate to said plasma for a period of time sufficient to etch said high-k dielectric layer, wherein said high-k dielectric layer comprises HfO