Give some details about your process. Is this happening on Innerlayers? Outerlayers? Acid etch? Ammoniacal etch? What is the preclean process? Exposure process? All of these can affect resist adhesion. I don't know of a test for resist hardness, although I'm sure there must be someone who does. Most people use a simple crosshatch/tape test for resist adhesion, although IMO this is rather subjective. Provide some more info, and I'll try and help. Mark Dowding Multek [log in to unmask] [log in to unmask] The mail list is run by SmartList v3.05 To unsubscribe from this list at any time, send a massage to: [log in to unmask] with subject:unsubscribe and no text.