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Pyralux
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IPC 2223 Design Standard for Flex & Rigid-Flex Circuits
cdn.hackaday.ioFA-251 section 3.2.1.1.2 and by material suppliers (i.e. DuPont Pyralux Technical Manual section 5.23). This applies to all polyimide based flex and rigid-flex designs. Polyimide is hydroscopic and will adsorb approximately 2% by weight in moisture …