Neil, I tent vias to help prevent shorts. If a PCB is disposed towards growing dendrites then I would think there is a serious cleaning problem. Bob -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Neil Atkinson Sent: Wednesday, July 04, 2012 12:02 PM To: [log in to unmask] Subject: [TN] Copper Dendrites What is the view of covering vias with solder resist to prevent dendrite growth? This is an FR4 PCB with OSP finish, SMT reflow both sides and a few through hole components soldered with a selective soldering process... Thanks in anticipation of the help of the Technet! Neil ______________________________________________________________________ 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] ______________________________________________________________________