Hi Wayne, There are a number of things that bring these boards into question. What I am concerned with is the crazing. I think that the fabricator has an automated plating line that requires two passes to get the copper thickness. 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 Wayne Thayer Sent: December 13, 2013 1:13 PM To: [log in to unmask] Subject: Re: [TN] Crazing - the pictures Hi Paul- Nice sections. Aren't they supposed to have the drill actually spin when they push it through the board? What's going on with the two layers of plating? That first layer is more than electroless would normally put down. I guess maybe they checked hole size reduction to see how much plating they put down, realized they'd missed a minimum on the hole wall, and put it back into the bath. I tend to think of the defect you have been talking about as "heavily damaged fibers", and think of crazing as voids/cracks within the prepreg. I agree that I would be very concerned about the long term reliability of these boards and would like to know how much fallout the fabricator had due to plating shorts along these damaged fibers. Wayne -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Paul Reid Sent: Friday, December 13, 2013 12:49 PM To: [log in to unmask] Subject: [TN] Crazing - the pictures Hi Everyone, I finally found Steve Gregory's email address. He has kindly posted some the pictures of the crazing that I found. http://stevezeva.homestead.com/6494_2_1_mod.jpg http://stevezeva.homestead.com/6494_M_001.jpg http://stevezeva.homestead.com/6496_2_10.jpg 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] ______________________________________________________________________ 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] ______________________________________________________________________