Polymers containing oxygen and sulfur alicyclic units and...

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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C430S272100, C430S326000, C430S311000

Reexamination Certificate

active

07105266

ABSTRACT:
The invention includes polymers that contain a heterocyclic ring, preferably an oxygen- or sulfur-containing ring. The heterocyclic ring is preferably fused to the polymer backbone. The invention also provides photoresists that contain such polymers, particularly for imaging at short wavelengths such as sub-200 nm.

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