Steve,
The
purposes for conductive via fill include providing a smooth surface for via
in land designs and prevention of flux entrapment. Conductive fillers are
sanded flat to provide a planar surface. They are also overplated
with copper and/or surface finishes. Non-conductive epoxy fillers do not
provide a surface as conducive to subsequent plating as the conductive
materials.
Hope
this helps.
Don
Vischulis
-----Original Message-----
From: TechNet
[mailto:[log in to unmask]]On Behalf Of Steve Gregory
Sent:
Thursday, November 14, 2002 5:22 PM
To:
[log in to unmask]
Subject: [TN] Conductive epoxy via
filling...
Hi all!
Just a general
question about filling vias with conductive epoxy. Why is that done? Performance
reasons? Electrical reasons?
Just curious why one would want to
specifically use conductive epoxy to fill vias...
-Steve Gregory-
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