I would not scrap the parts because of a score issue.  Many repairs have
worked to keep pallets together in assembly. 

In this case I would try Permabond 102 - low CPS and flows well into
small areas.  With the pallets flat, apply the glue in the x areas if
the score and then in drop increments along the score line.  Do this to
both sides and you will see the strength improve.  You can also use
polyimide tape along the score areas that have area to tape to.  

I would pose this to you supplier and they could do the repair for you.


Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED 
           76 Technology Drive - POB 1890 
              Brattleboro, Vermont 05302
                Voice - 802.257.4571 ext 21
                    Fax - 802.257.0011
                       <http://www.vtcircuits.com/> 
                           

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Wheeler
Sent: Tuesday, March 28, 2006 7:46 AM
To: [log in to unmask]
Subject: [TN] V-Score too deep repair method

We had a PCB shop score some of our board too deep and they are falling
apart on our assembly line. The board shop admits fault but want us to
still use them. They have come up with a solution to use Super Glue or
Epoxy A-B pate on the scores to strengthen the scores. I have concerns
that the glue/paste will weaken when going thru our wave with
temperatures
of 250F. At what temperature will the glue/paste change state? Does it
emit vapors, does it dry up and flak off? Will it contaminate the wave?
Anyone have any experience or thoughts on this?

TIA,

John

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