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Flat flexible cable to PCB (RoHS assembly)

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#46407

Flat flexible cable to PCB (RoHS assembly) | 28 December, 2006

Good tidings, all.

I am looking for a machine that will allow us to mount a flat flexible strip (such as TennRich's B.Type) to a row of pads on a PCB. I have not much knowledge about the process, I guess I expect to see a machine with some hot bar. Can someone suggest a machine model or a brand, so I can focus on getting a quote for that kind of tooling?

Also, it has to be applied to a RoHS assembly. I am wondering if cranking the heat a tad, on that machine, risks damaging the flat flexible cable (it is just a plastic membrane with conductors inside, after all)?

Thank you for any input you may have for me!

Have a happy new year!

Joey

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#46411

Flat flexible cable to PCB (RoHS assembly) | 28 December, 2006

If this is same TennRich Type B [ http://www.tennrich.com/trtw/TR_PI_Prod_Info.php?pid=2 ] that is an EMI gasket, it needs to be glued with a conductive adhesive. It has the same thermal capability as a Snickers Bar, about 90*C top end.

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#46414

Flat flexible cable to PCB (RoHS assembly) | 29 December, 2006

Thank you for the quick reply!

Actually, the "type B" I referred to applies to a flex cable that can be found in this page:

http://www.tennrich.com/trtw/cabling_3.php

It is a reverse Engineering project and, from what I can see, there is, indeed, a 2-sided adhesive strip on the PCB, but it is next to the contact area and it is apparently used to keep the cable from pulling the contacts off the PCB, by reducing any physical stress beyond that point.

But I still don't see how the contacts themselves are physically attached to the pads on the PCB. The contacts must have been prepped (or plated) in order to be "soldered", I reckon.

I just wonder what tooling will allow this to happen. Since that it is to be applied to a RoHS assembly, I also wonder if heat will not become an important variable in the process. I mean, Pb-Free solder joints require a higher temperature, but that flexible cable is made of a plastic-like substrate.

If someone can recommend a tool for this task, I would be greatly appreciative.

Thank you!

Joey

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