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Avin,
Do you have access to a 3D printer? Could you print an enclosure that would be about 2-3 mm thick, so the wearable device was not directly touching the skin? If the PCB were mounted in there flush with the enclosure, it would give you the distance you desire. Alternately, you could get...
Re: is this acceptable ? - vias under component? - small package TQFP
If there is no thermal pad on the bottom of the part, you have complete protection against shorting as the part's package will prevent it.
That being said, I prefer to always have all vias and silk screen visible after...
I agree with all above posts. My only warning is - if you are assembling the boards using a standard stencil, you may want to deviate from the standard 5-mil steel and reduce to a 4-mil or 3-mil. Even if paste is applied to each pad properly, the surface tension during reflow will cause a bit of...
I second what all of these guys said. Take a board with 100 components, pretty simple. Loading it up on a pick-and-place machine with all SMD parts takes an hour or two. Having the machine place 100 parts is going to take about 10 minutes (and that's a really slow machine, placing only 10 parts...
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