Patent ID: 7888267
Filing Date: 2011-02-15
Classification: H01J,H01L

Abstract:
1. A method of dry developing an anti-reflective coating (ARC) layer on a substrate, comprising: disposing a substrate comprising a multi-layer mask in a plasma processing system, wherein said multi-layer mask comprises a lithographic layer overlying a silicon-containing ARC layer and wherein said lithographic layer comprises a feature pattern formed therein using a lithographic process; establishing a process recipe configured to cause a reduction in an offset between a first critical dimension (CD) bias for nested structures in said feature pattern and a second CD bias for isolated structures in said feature pattern, wherein said first CD bias is measured as a first difference between a first CD for nested structures of said feature pattern in said lithographic layer and a second CD for nested structures of said feature pattern in said silicon-containing ARC layer and said second CD bias is measured as a second difference between a first CD for isolated structures of said feature pattern in said lithographic layer and a second CD for isolated structures of said feature pattern in said silicon-containing ARC layer; introducing a process gas to said plasma processing system according to said process recipe, said process gas comprising SF forming plasma from said process gas in said plasma processing system according to said process recipe; and exposing said substrate to said plasma in order to transfer said feature pattern in said lithographic layer to said underlying silicon-containing ARC layer.