Positive-working aqueous base developable photosensitive polybenzoxazole precursor/organoclay nanocomposites

Steve Lien Chung Hsu, Chi Yi Lin, Shih Wei Chuang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Positive-working aqueous base developable photosensitive polybenzoxazole (PBO) precursor/organoclay nanocomposites have been prepared through the addition of an organoclay to a PBO precursor. The organoclay was formed by a cation exchange reaction between a Na+-montmorillonite clay and an ammonium salt of dodecylamine. The PBO precursor used in this study was a polyhydroxyamide that was prepared from a low-temperature polymerization of 2′2′-bis(3-amino-4-hydroxyphenyl) hexafluoropropane and 4,4′-oxydibenzoyl chloride with an inherent viscosity of 0.3 dL/g. The photosensitive resin/clay formulations were prepared from the precursor with 2,3/4-tris(1-oxo-2-diazonaphthoquinone-5-sulfonyloxy)-benzophenone photosensitive compound and 3-5 wt% organoclay. The PBO precursor/clay was subsequently thermally cured to PBO/clay at 350°C. Both X-ray diffraction and transmission electron microscope analyses showed that the organoclay was dispersed in the PBO matrix in a nanometer scale. The thermal expansion coefficient of PBO/clay film, which contained 5 wt% organoclay, was decreased 33% compared to the pure PBO film. The PBO/clay nanocomposite films also displayed higher thermal stability, glass transition temperature, and water resistance than the pure PBO film. The photosensitive PBO precursor/clay nano-composite showed a line/space pattern with a resolution of 5 jam and its sensitivity and contrast were not affected by the organoclay.

Original languageEnglish
Pages (from-to)2350-2356
Number of pages7
JournalJournal of Applied Polymer Science
Volume97
Issue number6
DOIs
Publication statusPublished - 2005 Sep 15

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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