Ryan I'd consider these boards very suspect. One of the biggest problems (beyond the obvious misregistration) with trying to re-drill holes like this is the second drill packs debris into the first hole. If this doesn't get removed, the interconnect quality can be seriously compromised. It's doubtful the cross sections looked at any of these holes in the correct orientation to see if smear was present. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Ryan Grant Sent: Tuesday, April 26, 2005 8:24 AM To: [log in to unmask] Subject: [TN] Oval via holes Hi Technetters, Our AQL department discovered some boards that they thought might be annular ring violations. Although they are admittedly ugly, the drilled hole did not break out of the annular ring so they are in spec. However, I noticed the drilled hole is oval shaped. It appears a drill bit may have broken and the panel was "re-drilled" to ensure all holes are there. Apparently, by random chance, some via holes were not drilled in the exact same location, causing an oval hole. In one hole, the second drill is offset from the first by 3/4ths the diameter of the first drill. Now I'm not sure what to make of it. What are your opinions? A little weird looking but just fine? Thanks, Ryan Grant --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------