One common culprit is poor copper plating in the barrel, causing outgasing.
A quick test is touching up with a soldering iron and observe for presence
of bubbling in the solder.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Irving Lee
Sent: Thursday, November 30, 2006 8:31 AM
To: [log in to unmask]
Subject: [TN] Solder Voids in Hole barrel after W/S
What are the critical control factors to avoid solder voids in hole barrel
after W/S ?
We have checked following items , but still have serious solder void problem
.
1. Good Hole Wall Quality
2. Good solderability for component tail
3. Good HASL thickness
4. No Ionic contamination
Irving Lee
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