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Positive tone Photosensitive Polyimide B-stage sheet which was composed of transparent soluble polyimide, naphthoquinone diazide compound, thermal cross linker and solvent, was developed. We designed new polyimide structure and cross linker suitable for photosensitive polyimide sheet. The photosensitive sheet shows fine pattern formation capability as well as good thermal stability and mechanical...
Novel Non Conductive Film (NCF) was developed for high productivity process. To meet high productivity, we add viscosity stability on a hot stage and snap cure property at higher than 140C. In addition, the NCF is transparent for optical alignment process.
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