Eco-friendly Synthesis of Cross-linkable Poly(Amic Acid) Salt for Micropatterned Polyimide
발표자
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초록
내용
The poly(amic acid) salt (PAAS) conjugated with a photo cross-linkable organic base is one of the candidates as the patternable polyimide precursor. The photo cross-linkable polyimide precursors have the advantage to reduce the step of the photo-lithographic process, which is efficient for energy and prices. However, PAAS is typically prepared by multi-step reaction and using an organic solvent that causes significant environmental pollution. As the solution to this, we propose the synthesis of photo cross-linkable PAAS via an eco-friendly and one-step reaction by using water as a solvent. The proposed polymer undergoes chemical cross-linking by UV exposure, which is suitable to prepare the micrometer-scaled polymer patterns. We also present the converting the patterned polymer to polyimide via a thermal-imidization process without morphology disturbing in the micrometer scale.