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Bloody Brilliant: Flex PCBs via Ninjaflex!!!

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Posted · Bloody Brilliant: Flex PCBs via Ninjaflex!!!

Personally I would use good ol toner transfer. Much better resolution and less fiddly.

 

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Posted · Bloody Brilliant: Flex PCBs via Ninjaflex!!!

That doesn't make any sense. How can they populate a flex cable if it can't take the relatively low temps of a clothes iron?

 

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Posted · Bloody Brilliant: Flex PCBs via Ninjaflex!!!

Not sure. I don't even know what flex cable or toner transfer is. But my clothes iron gets impressively hot. Probably 200C. Ninjaflex may be deposited at 240C but is around 100C within 3 seconds. So perhaps it doesn't heat the "flex cable" as much as an iron?

 

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Posted · Bloody Brilliant: Flex PCBs via Ninjaflex!!!

It's the yellow-orange-brownish thin ribbons you can find in electronics. It's basically a very thin PCB. Some simply function as a replacement for a cable and are attached using ZIF-sockets (zero insertion force). Others are soldered directly to the board, or glued, or have contacts soldered to them. Some come without components on them and others can have passives (resistors, capacitors) attached.

Now, I don't pretend to be an expert on these things, not even close. But, I would assume that they'd be using reflow soldering the components on there and these days it's mostly that icky lead free stuff being used. Here's a random profile for reflowing with lead-free paste. As you can see it gets rather hot:

http://s.eeweb.com/members/ixys/blog/2014/01/23/Lead-Free-Solder-Reflow-for-Semiconductor-Power-Devices-1390460256.JPG

 

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Posted · Bloody Brilliant: Flex PCBs via Ninjaflex!!!

Makes me think about some booth I seen at MakerFaire. They were printing circuits like that in 2 passes and the reaction between both passes was creating the conductivity. They could print that on pretty much any type of base. They had some printed on a piece of paper.

I'll have to find that flyer somewhere at work...

 

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