Hi Pat - could the half moon defects be plating defects (aka mouse bites from hydrogen bubbles formed during plating) instead of a mechanical root cause? Dave Hillman Rockwell Collins [log in to unmask] "Goodyear, Patrick" <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 03/06/2012 04:34 PM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to "Goodyear, Patrick" <[log in to unmask]> To <[log in to unmask]> cc Subject [TN] Damaged board traces, Working on single sided legacy boards, I finding half moon rub marks on the traces adjacent to pads, about 0.15" (3.5mm) away. They are circular in nature (half moon shape) on the edges of the traces. Definitely mechanically made. These boards are roughly 40 years old and have never been used. I'm inspecting them prior to installation. Anyone know of any OLD process that could make these types of marks. I have inspected 4 boards and find the same types of deformation on all of the boards although not in the same places. I suspect the boards were originally hand soldered, as there is no solder mask on the runs and they are plated with no excess solder clinging to them. pat ______________________________________________________________________ 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] ______________________________________________________________________