Wendi, I agree with your intent to check all including the 1-2-3 vias. Nick -----Original Message----- From: Jose A Rios <[log in to unmask]> To: (Combined Forum of D-33a and 7-31a Subcommittees) <[log in to unmask]> Sent: 6/17/2010 7:06:50 PM Subject: Re: [IPC-600-6012] Definition of "Via Structures" hi wendi, i beleive it is not correct, and agree with your 'intent bending' statement. you'd be missing the plating integrity evaluation of the 1-2 / 2-3 interface and its registration. Joey Rios PWB & Process Quality Eng'r Endicott Interconnect Technologies 1093 Clark St. Endicott, NY 13760 Office: 607-755-5896 Wendi Boger <[log in to unmask]> Sent by: IPC-600-6012 <[log in to unmask]> 06/17/2010 06:30 PM Please respond to "(Combined Forum of D-33a and 7-31a Subcommittees)" <[log in to unmask]> To [log in to unmask] cc Subject [IPC-600-6012] Definition of "Via Structures" Need clarification on the definition of Via Structures as is relates to Microsection Requirements. 3.6.1.5 Microsection Requirements ..... Evaluation of all applicable PTHs and vias, including blind and buried, for all such structures found on the finished printed board shall be inspected in the vertical cross section in accordance with Table 4-3. ... If a board has 1-2 lasers and 1-2-3 stacked lasers is it correct to have 2 coupons one as 1-2 and one as 2-3. Both drill cycles and plating cycles are represented but the 1-2-3 total via structure is not. Seems like the 1-2 and 2-3 only is bending the intent. Wendi This communication is for use by the intended recipient(s) only and may contain information that is privileged, confidential, proprietary and exempt from disclosure under applicable law. You are hereby notified that any dissemination, distribution, forwarding or copying hereof is strictly prohibited without the express written consent of DDi. If you have received this communication in error or are not the intended recipient, you should destroy the message and any attachments or copies, and you are prohibited from retaining, distributing, disclosing, or using any information contained herein. Please inform us of the erroneous delivery by return e-mail. Thank you for your cooperation. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________