Patent ID: 7727705
Filing Date: 2010-06-01
Classification: G03F,Y10S

Abstract:
1. An etch resistant thermally curable Underlayer composition for use in a multiplayer liyhographic process to produce a photolithographic bilayer coated substrate, the composition comprising: (a) at least one cycloolefin polymer comprising at least one repeating unit of Structure (I), and at least one repeating unit of Structure (II), and optionally at least one repeating unit of Structure (III) with the proviso that neither Structure (I) nor Structure (II) nor Structure (III) contains acid sensitive groups wherein R b) at least one cross-linking agent selected from the group consisting of an amino and a phenolic cross-linking agent; c) a least one thermal acid generator (TAG); d) at least one solvent; and e) optionally, at least one surfactant.