Polybenzoxazoles from poly-o-hydroxyamide, novel...

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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C430S283100, C558S272000

Reexamination Certificate

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07070904

ABSTRACT:
High-temperature-stable polybenzoxazoles are formed from novel poly-o-hydroxyamides. The novel poly-o-hydroxyamides have low dielectric constants, are suitable for exposure at 248 nm or shorter wavelengths, and have hydroxyl groups at least some of which have been protected by tert-butoxycarbonyl protective groups.

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English language abstract of JP 11-202489.
English language abstract of JP 2001-049119.
English language abstract of 10-204291.
Hong et al, “Chemically Amplified Photosensitive Polybenzoxazoles Based on tert-Butoxycarbonyl Protected Hyperbranched Poly (o-hydroxyamide)s” Macromolecules, 2003, 36, 3174-3179.

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