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Author Topic: See through pcb  (Read 3371 times)

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Offline psxpetey1Topic starter

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See through pcb
« on: April 06, 2015, 12:29:54 am »
Ok so heres the deal. Ive aquired a developer android phone which has a few extra hardware features that the specific brand retail phones do not. So I was wondering if there is a way top see through the pcb without using an xray. The solder mask pretty much masks everything traces are all hidden. What methods do you useÉ Would A REALLY strong light work? Thanks in advance!
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Offline Alex Eisenhut

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Re: See through pcb
« Reply #1 on: April 06, 2015, 12:42:06 am »
Pretty sure it's not the solder mask that's masking anything, but copper. I'd assume pretty much any "smart" phone is made with HDI and therefore 99% of all traces are internal, power planes on the outside, blind plugged vias everywhere. There's no other way to build these things at that size.

You'd need nuclear explosion level visible light to get through that. But why not try? The board's probably really thin, I have a 650W GE lamp here and a PCB... might give it a try.
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Offline psxpetey1Topic starter

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Re: See through pcb
« Reply #2 on: April 19, 2015, 04:28:00 am »
awe man:(
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Online T3sl4co1l

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Re: See through pcb
« Reply #3 on: April 19, 2015, 07:11:27 am »
Well, you could do...

Ultrasound density analysis
X-ray or gamma transmission, backscatter
Neutron transmission, scattering (note: elements will react, leaving residual radioactivity)
Other nuclear methods (beta?) probably not recommended due to the presence of sensitive electronics.  As-is, x-rays won't be too friendly towards Flash memory contents.

Tim
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Offline Cherry

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Re: See through pcb
« Reply #4 on: April 20, 2015, 06:55:05 am »
Maybe you can try again.
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Offline daqq

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Re: See through pcb
« Reply #5 on: April 20, 2015, 08:06:12 am »
Quote
You'd need nuclear explosion level visible light to get through that. But why not try? The board's probably really thin, I have a 650W GE lamp here and a PCB... might give it a try.
Nope - even really thin sheets of copper make for a very effective visible light blockage. Add to that the random diffusion/scattering done by the FR4 (or similar) laminate, the very fine traces (assuming 6 mil or less), the number of layers (assuming 6 or more, two or more of which are solid copper planes) and you are 100% done with visible light for a non destructive analysis.

In your situation I believe X ray is the way to go - ask your local dentist or vet.

Also look at: http://hackaday.com/2015/03/05/deconstructing-pcbs/
« Last Edit: April 20, 2015, 08:07:53 am by daqq »
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Offline Cherry

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Re: See through pcb
« Reply #6 on: April 20, 2015, 11:45:44 am »
I also want to know details about PCB.
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