High etch resistant underlayer compositions for multilayer...

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making

Reexamination Certificate

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C430S271100, C430S313000, C430S325000, C430S327000, C430S330000, C430S905000

Reexamination Certificate

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07727705

ABSTRACT:
An etch resistant thermally curable Underlayer for use in a multiplayer liyhographic process to produce a photolithographic bilayer coated substrate, the composition having:(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.b) at least one cross-linking agent selected from the group consisting of an amino or phenolic cross-linking agent;c) a least one thermal acid generator (TAG);d) at lest one solvent; ande) optionally, at least one surfactant.

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