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I want to connect a mobile processor such as a Samsung Exynos or Qualcomm Snapdragon, which both have their connectors on the bottom to a PCB but im not sure if this is something i can do on my own or needs a pick and place machine, to be honest im not entirely sure what the method of soldering used is called. Can you please inform me if a socket is available for these also? Sorry if this came across as a dumb question, thanks for the help :)

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    \$\begingroup\$ Then that's not trivial either, you'd need more than one layer and would need vias and decoupling caps, a real tough job even for a pro. You'd better set your sights a little lower! \$\endgroup\$ Commented Oct 13, 2016 at 12:32
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    \$\begingroup\$ Can you please inform me if a socket is available for these also? There probably are but since you have to ask I'm quite sure you cannot afford one. Such sockets are used for testing only not for using in a product. \$\endgroup\$ Commented Oct 13, 2016 at 12:32
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    \$\begingroup\$ Erm, you are trying to connect a several hundred pin processor which runs are several hundred MHz to a breadboard?? You really need to reanalyse your plans. \$\endgroup\$ Commented Oct 13, 2016 at 12:32
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    \$\begingroup\$ I think you can safely forget about making mobile phone/ raspberry pi type complexity on a home-build system. This requires knowledge and experience only to be found in professional environments. Start with a simpler microcontroller based board without BGA packaged ICs. You'll have enough trouble with that in the beginning. \$\endgroup\$ Commented Oct 13, 2016 at 12:36
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    \$\begingroup\$ That's cute. Connecting a 1000 pin IC to a breadboard. I hope you have a large breadboard! \$\endgroup\$
    – pipe
    Commented Oct 13, 2016 at 12:40

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It is not possible to solder components with contacts on the bottom (called Ball Grid Array, or BGA) using a soldering iron. You would need either a reflow oven, or a BGA rework station.

Some people do have reflow ovens at home, or have converted toaster ovens to do the job, but even then it's a bit tricky and easy to mess up.

So the answer to your question is yes, you can do this at home if you have the right tools, but if you only have a soldering iron then you can't.

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    \$\begingroup\$ To add to this, soldering companies use some sort of X Ray machine to verify the soldering quality which costs thousands of dollars. \$\endgroup\$ Commented Oct 13, 2016 at 12:20
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You can do it dead bug style: enter image description here

Is it practical or is it going to work, especially in an 1000+ balls device?

I don't think so...

(Image from the comments area from Hackaday website)

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  • \$\begingroup\$ The... the horror! \$\endgroup\$
    – user98663
    Commented Oct 14, 2016 at 14:41
  • \$\begingroup\$ That hurts to look at \$\endgroup\$ Commented Oct 14, 2016 at 17:45
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I doubt it, the bottom of a mobile processor has a lot of pins that are too small for you to handle and would need a reflow oven.

Bottom of a CPU

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  • \$\begingroup\$ A reflow oven is pretty cheap. Lots of hobbyists have one in one form or another. \$\endgroup\$
    – pipe
    Commented Oct 13, 2016 at 12:26
  • \$\begingroup\$ Yes. It is called "heat gun", $30 or something. And lots of hobbysts can afford to make 10-12-16 layer boards with buried vias, to get proper wire fan-out for 1000+ pins, with 0201 bypass caps. Yes! \$\endgroup\$ Commented Oct 13, 2016 at 16:08
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    \$\begingroup\$ @AliChen: Getting the chip on there might be possible but if it doesn't work then you have practically no way to find out why, besides desoldering it again, but then how are you going to re-ball it at home? Totally impractical. \$\endgroup\$
    – user98663
    Commented Oct 13, 2016 at 16:26
  • \$\begingroup\$ Absolutely. Yield will reek to the point that any prototype will have zero testing value, so you may as well skip the step. \$\endgroup\$ Commented Oct 14, 2016 at 17:46

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