Radiation-sensitive resin composition

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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C430S921000

Reexamination Certificate

active

07144675

ABSTRACT:
A radiation-sensitive resin composition comprising (A) a resin comprising at least two recurring units of the formulas (1)–(6) in the total amount of 5–70 mol %, but each in the amount of 1–49 mol %, the resin being insoluble or scarcely soluble in alkali, but becoming easily soluble in alkali by the action of an acid, and (B) a photoacid generator.wherein R1is a hydrogen or methyl and R2is a substituted or unsubstituted alkyl group having 1–4 carbon atoms. The resin composition is useful as a chemically amplified resist having high transmittance of radiation, sensitivity, resolution, dry etching resistance, and pattern profile.

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