According to IPC-A-600, measling should not be the cause for a rejection (2.3.1). However, when the measles become interconnected, it becomes delamination. Two questions I would ask you. Are you observing measling, or delamination and what class of boards are you building to? Any delamination that bridges between two conductors is nonconforming in any class (2.3.2) Any delamination that spans more than 25% of the distance between conductors, but does not bridge between the conductors is non-conforming on class 2 and 3. Hope this helps you. ---------- From: Wynne, Derek [SMTP:[log in to unmask]] Sent: Friday, April 07, 2000 10:40 AM To: [log in to unmask] Subject: [DC] PCB measling. Hi All, I have had an inquiry from one of our subcontractors re-measling on several PCB's that they have just finished stuffing for us. They are looking for detailed acceptance/rejection criteria. Our subcontractor states that the IPC specification is a bit vague on this topic and by itself is difficult to generate acceptance/rejection criteria from. Do any of you specify acceptance/rejection criteria for measling on PCB's, if so what are the criteria and how did you arrive at them ? I only have a copy of the early IPC-A-600, I am told that there is more information in IPC-A-600F about measuring, so I will order that, but in the mean time could someone please have a look at that standard and forward me the relevant information. I would be very grateful as this is delaying production for us. Thanks in Advance; Derek As I do not have a copy of IPC-A-600E