#1 Yes allowed. AABUS(sorry- yes I know, not much help here). #2 I have seen reference to a defense sector customer spec referencing a bubble defined as being an issue if greater than or equal to 1/16 of an inch. No supporting data for this. #3 No, if for no other reason than FOD. Rich Kraszewski (920)969-6075 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls Sent: Thursday, March 21, 2013 9:19 AM To: [log in to unmask] Subject: [TN] Conformal Coat and Bubbles OK, Minions, your next question in the quest to improve J-STD-001 and A-610 relates to bubbles in the conformal coating. I think we can all agree that the ideal conformal coating layer contains no bubbles or voids and is "purdy". BUT: 1. Are there bubbles in coatings in areas where they will not impact reliability and their presence should be viewed as a "Process Indicator"? If so, where and what limits would you use? 2. What would you classify as a bubble requiring disposition, i.e. Becomes an actionable defect? If so, where and why? 3. Would any of your answers change depending on what KIND of coating it is, i.e. Acrylic vs. silicone vs. Parylene? Well, OK, that is three questions. I'm on a roll. Doug Pauls Chairman, IPC Cleaning and Coating Committees Galactic Emporer ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________