A former colleague of mine, Alan Clark, at BAE SYSTEMS, Edinburgh,
Scotland, UK has acquired a hot bar soldering system for attaching flexis
to polyimide boards. He can probably help you with some of the issues
involved. Get back to me if you want to contact him and I'll clear it with
him first. There are QA considerations, because the shape of the finished
solder joint does not conform to acceptable standards per IPC 610 - the
joints are flattened because of the constraint of the bar. The joints do
perform well, however.

Rgds

Pete Duncan

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