Spray a little flux on the first side when running the second side?

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ed Popielarski
Sent: Friday, May 08, 2015 1:08 PM
To: [log in to unmask]
Subject: [TN] Dpak outgassing second pass

Greetings fellow Technoids,

An interesting debacle arose, and I'm unsure if there is a solution.

Dpak components on side 1 solder fine, <25% voids, 100% edge wetting.

On 2nd pass (top side, big heavy components) the Dpaks on side 1 outgas and
exceed 25% (not a spec, just a target) but violate edge wetting (S/B 100%)
as the outgas tends to blow out the edge somewhere.

Any suggestion on how to eliminate this phenomena? Parts cannot be relocated
due to aerospace re-qual cost.

Thanks in advance!


Ed Popielarski
Engineering Manager

[cid:[log in to unmask]]
                               970 NE 21st Ct.
                              Oak Harbor, Wa. 98277

                              Ph: 360-675-1322
                              Fx: 206-624-0695
                              Cl: 949-581-6601



       "It's one kind of victory to slay a beast, move a mountain, and cross
a chasm, but it's another kind altogether to realize that the beast, the
mountain, and the chasm were of your own design."
https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&spn=0.0
11188,0.033023&ctz=420&t=m&z=16&iwloc=A


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________