Technetters, has anyone seen anything like this before.

For background information we see this phenomenon on both
polyimide and FR-4 material.  The process is similar to both
material types:
Drill
Plasma Etch for desmear or etchback
Deburr (RO Water)
High pressure water wash (RO Water)
Electroless Copper (about 60 microinches)
Panel plate (Flash - about .25 mils)
Photo image, develop
Pattern Plate

The picture identified as Fissure1 was pulled out at pattern
plate (No thermal contact).
All other pictures were taken after full processing.

Rick Babyak
Process Engineer

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