Patent ID: 7276327

Claim:
A method of forming a patterned material feature on a substrate, the method comprising: providing a material layer on a substrate, forming a stack comprising, from bottom to top, an organic underlayer and an antireflective/hardmask layer over the material layer, said antireflective/hardmask layer comprising a crosslinking component and a silicon polymer having a plurality of reactive sites distributed along the polymer for reaction with the crosslinking component, wherein said silicon polymer is a novolacsilane polymer comprising phenolic groups on the main chain and cluster silane groups on the side chains, forming a radiation-sensitive imaging layer over the antireflective/hardmask layer, and patternwise exposing the imaging layer to radiation thereby creating a pattern of radiation-exposed regions in the imaging layer, selectively removing portions of the imaging layer, the antireflective layer and the underlayer to expose portions of the material layer, and etching, electroplating, metal depositing or ion implanting the exposed portions of the material layer, thereby forming the patterned material feature.