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Hot Bar Soldering

Hot Bar Soldering

Hot Bar Soldering

I have to design how to solder some very narrow double layer flex to another PCB by hot bar soldering process. The flex should have the same width at the and and cannot be widened and, also, cannot have a rigid PCB area at the end.
Is it possible at all? How to bring two layers of conductive tracks to solder pads on one side of the flex?
Sorry if I'm asking a stupid thing, I'm a mechanical engineer who needs to integrate a PCB into a mechanical design...

RE: Hot Bar Soldering

Sounds like a simple design for an EE to handle... the "top" side of flex traces end, say, 0.2" before the end of the flex and terminate in pads on the top side. The "bottom" side of flex traces end, say, 0.1" before the end of the flex and terminate in pads, also on the top side. Hot press per usual to matching pads on rigid PCB.

Dan - Owner

RE: Hot Bar Soldering

Well... but how to bring the outer layer to the pads on the same side?
Can I use vias on a flex?

RE: Hot Bar Soldering

Of course... nothing different about vias on flex compared to rigid, other than teardropping incoming lines. Google flex PCB design and you'll find plenty of free e-books on the subject.

Dan - Owner

RE: Hot Bar Soldering

Thank you!

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