Since board edges are routed AFTER drilling, it doesn't matter where you put the holes. Unplated holes do not affect the router bit. We have holes along the board edge on EVERY design Plated holes are a different story, but many vendors have no trouble creating "half-holes", which makes the edge of the board look like a castellated component. There are some extra process steps to keep the plated barrel from ripping out, but it is done all the time. Best Wishes, Jack -----Original Message----- From: Frank A Bergmeister [mailto:[log in to unmask]] Sent: Friday, February 20, 2004 12:15 PM To: [log in to unmask] Subject: [DC] drill hole to board edge ... Can anyone quote the spec for how close a nonplated thru hole can get to the board edge. I know the rule of thumb, but I need to see something in writing. Thanks --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 847-509-9700 ext.5315 ---------------------------------------------------------------------------------