Hi Franklin,
Thanks for the quick response.
After assembly.   We have also seen a bare board with thin hole wall Cu.

Thanks,
Kerry

Kerry McMullen
Principal New Product Mfg. Engineer
LTX Corporation
50 Rosemont Road
Westwood, MA 02090-2306
(T) 781-467-5468



Franklin D Asbell <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
08/01/2006 09:52 AM
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TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Franklin D Asbell <[log in to unmask]>


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Re: [TN] Barrel to Laminate Adhesion loss






Could be a few causes, at what stage are you seeing this?

1 - As Received condition?
2 - After Thermal Stress?
3 - After Assembly?

Some common causes could be;

1 - Poor drilling (resulting in excessive resin smear or damaged hole
wall)
2 - Poor resin smear removal
3 - Poor pre-electroless copper cleaning-prep
4 - Poor electroless copper plating
5 - Material type (are you using some exotic material)

Would you provide more info.

Franklin

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kerry McMullen
Sent: Tuesday, August 01, 2006 8:46 AM
To: [log in to unmask]
Subject: [TN] Barrel to Laminate Adhesion loss

Esteemed Tech-net,
What are the causes of Barrel to Laminate Adhesion loss?

TIA,
Kerry

Kerry McMullen
Principal New Product Mfg. Engineer
LTX Corporation
50 Rosemont Road
Westwood, MA 02090-2306

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