1. Photoimageable polyimides derived from ?,?-(4-amino-3,5-dimethylphenyl)phenylmethane and aromatic dianhydride
- Author
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Maosheng He, Jingkai Liu, Z. X. Li, Z. G. Qian, Lingzhong Fan, S. Y. Yang, and Z. Z. Pang
- Subjects
Materials science ,Polymers and Plastics ,Photosensitivity ,Direct exposure ,Organic Chemistry ,Thermal decomposition ,Polymer chemistry ,Materials Chemistry ,Thermal stability ,Dielectric ,Photoresist ,Solubility ,Polyimide - Abstract
Soluble and inherent photoimageable polyimides with improved photopatterning features were prepared from α,α-(4-amino-3,5-dimethylphenyl)phenylmethane and 3,3′,4,4′-benzophenonetetracarboxylic dianhydride. The polyimides possessed good combined chemical and physical properties: thermal stability was observed, with an initial thermal decomposition temperature of 565 °C and a high glass-transition temperature of 318 °C. Homogeneous polyimide solutions in common organic solvents with solid contents as high as 20 wt % were prepared. These solutions had a shelf life greater than 3 months. The polyimides had high electric insulating properties and low dielectric constants and dissipation factors. Fine patterns were processed by direct exposure of the polyimide coatings to UV i-line, followed by development with an organic developer. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 3012–3020, 2002
- Published
- 2002