Looks like blue photo resist or blue masking tape mixed in with the mask. The white Lpi legend is just sitting on top. Really should have been caught before leaving the shop. Hope it's not ours. Robert E. Welch Senior Process Engineer Moog Components Group -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Watson, Howard August Sent: Tuesday, June 02, 2015 3:23 PM To: [log in to unmask] Subject: [TN] PCB blob defect Hi all, My PCB fab knowledge is limited, and a very unusual defect was discovered (too late) in assembly. I'm wondering if anyone has seen something like this before, or has an idea what this could be. The blue color seems noteworthy to me. This is for IPC class III, space. I will return this to the fabricator, but I wanted to get educated in case there is a debate regarding the cause. Thanks for your help! Steve put the pictures here: https://urldefense.proofpoint.com/v2/url?u=http-3A__stevezeva.homestead.com_Howards-5FBlob.jpg&d=AwIFAg&c=ByDrzdYw8tO08sJlHDO_Vg&r=LW2JrkDqJ9rzfIEkoxZO_Q&m=U1mWE0eEeNdVWPZ2kGgSBIKErUSaj04M2zjCZdlJ8FI&s=cK0Qst9ugBYDjh-P4sxWehsqkDam8ZritZguD4n1tcA&e= https://urldefense.proofpoint.com/v2/url?u=http-3A__stevezeva.homestead.com_Howards-5FBlob-5Fclose.jpg&d=AwIFAg&c=ByDrzdYw8tO08sJlHDO_Vg&r=LW2JrkDqJ9rzfIEkoxZO_Q&m=U1mWE0eEeNdVWPZ2kGgSBIKErUSaj04M2zjCZdlJ8FI&s=84ekEuSEwGwNPhAQ9PiYklxOVQ4IyMBIQtA6GaQPqBc&e= Howard A. Watson ______________________________________________________________________ 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] ______________________________________________________________________
