Hi Jack,

Here's a method I have used to look for plating voids, it actually works
pretty good. You won't be able to determine plating thickness, but it's a
quick way to check if you do have plating voids without doing a destructive
test

https://www.epectec.com/pcb/wave-soldering-defects/pin-blow-holes.html

Steve

On Tue, Mar 12, 2019 at 2:58 PM Jack Olson <[log in to unmask]> wrote:

> We are having an issue with bare boards, where it seems that one or two
> panels get less plating thickness than others. The fact that it seems to be
> a rare occurrence makes it even harder to pin down.
> The fabricator says they are shooting for 1.2 mils plating thickness, but a
> few of them at seemingly random times are more like an average 0.6-0.8 mil
> (we require average 1.0 with nothing less than 0.8)
> We can see it by cross sectioning coupons or x-out boards of course, but
> are there any other non-destructive methods of checking plating thickness
> accurately? The thought of doing a micro-section on every panel is
> intimidating.
>


-- 
Steve Gregory
Kimco Design and Manufacturing
Process Engineer
(208) 322-0500 Ext. -3133

-- 



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