Depanel before coating and (if needed) use a carrying fixture?  Anything 
I've ever built that went into an airplane was depanelized before coating.

regards,

Graham Collins
Senior Process Engineer
Sunsel Systems
(902) 444-7867 ext 211

On 6/17/2014 7:41 PM, Ed Popielarski wrote:
> Hi all,
>
> One of our aerospace customers is requesting boards depanelized from support frames.
>
> I looked into router, but the conformal coating tends to smear and will be a significant FOD issue later.
>
> We are willing to invest in laser, however, the result is a bit of charring on the edge, not much of a surprise. Unfortunately, this example http://stevezeva.homestead.com/Capture.JPG was rejected on IPC-A-610-Rev E Para. 10.7.4 "Solder Mask Coating-Discoloration" "Burned or charred solder mask material.
>
> In my opinion, this is not within the "spirit of the law" since there are no specific provisions for laser depanelization, only marking.
>
> Anyone know of some way around this?
>
> Ed Popielarski
> Engineering Manager
>
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