I believe Keith is on the right track. I've always considered "fisheye" defects in coating to have a dimpled appearance. Sort of like if you threw a rock into water and froze the picture just as the first ripple is made. It sort of pulls away from the middle and builds up a little bit around the edge. KennyB -----Original Message----- From: Mike Fenner [mailto:[log in to unmask]] Sent: Friday, February 20, 2009 8:31 AM To: [log in to unmask] Subject: Re: [TN] Conformal Coating Inspection Bob This is a little to one side of my present comfort zone, but I think I recall: The term fisheye is used to differentiate a surface bubble (with or without an actual covering film) from blistering or vessication which would be at coating/PCB interface. Fisheye would more likely be an application defect, vessication would be an in-service defect. Blistering could be either depending on the timing. Regards Mike -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Willis Sent: Friday, February 20, 2009 3:52 PM To: [log in to unmask] Subject: [TN] Conformal Coating Inspection I have been putting together some inspection standards for a new workshop in Germany. I have found a number of references to "Fish Eyes" but never seen an example. It's a common term but seems to be elusive in terms of actual examples. Would the images at the following link be considered "Fish Eyes" by users or are we looking for more subtle examples like two bubbles between IC leads?? www.ASKbobwillis.com/gonefishing.pdf Many thanks Bob Willis 2 Fourth Ave, Chelmsford, Essex, CM1 4HA England Tel: (44) 1245 351502 Fax: (44) 1245 496123 Mobile: 07860 775858 www.ASKbobwillis.com New Bob Willis "Printed Board Inspection & Quality Control Workshop" 24th March www.ASKbobwillis.com/faworkshops.pdf "Troubleshooting Your Assembly Yields Workshop" 25th March www.ASKbobwillis.com/faworkshops.pdf Book Bob's "Step by Step Failure Analysis Workshop" 22nd April www.ASKbobwillis.com/faworkshops.pdf --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ***This email, its content, and any files transmitted with it, are intended solely for the addressee(s) and may be legally privileged and/or confidential. 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