A picture is worth one thousand words. What is the surface finish of the card/board? Victor, -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Paul Reid Sent: Thursday, July 05, 2012 10:23 AM To: [log in to unmask] Subject: Re: [TN] Copper Dendrites Hi Neil, Are you saying that you are getting "Copper Dendrites" growth? I'd like to see a picture of a copper dendrite. A picture before and after would be nice. Sincerely, Paul Reid Program Coordinator PWB Interconnect Solutions Inc. 235 Stafford Rd., West, Unit 103 Nepean, Ontario Canada, K2H 9C1 613 596 4244 ext. 229 Skype paul_reid_pwb [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Neil Atkinson Sent: July 4, 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] ______________________________________________________________________ ______________________________________________________________________ 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] ______________________________________________________________________