That's not a good pass/fail gate. You can avoid breakout while being off on layer-layer by more than .005. What you achieve as an annular ring is directly related to the board design (pad to drill ratio) and it's not necessarily related to layer-layer registration. On 15 Jun 2005 at 16:04, Peter Lee wrote: Technet, I am looking for an acceptance criteria on PCB layer-to-layer registration. The pcb is 4 layer and 8x4". I was informed by our PCB vendor that they can conform to +/-0.005" and the pass/fail gate is no annular ring breakout. Can someone please confirm? Rgds, Peter --------------------------------------------------- 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 ----------------------------------------------------- -- Thanks, Eddie Rocha South Bay Circuits (480) 940-3125 x122 --------------------------------------------------- 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 -----------------------------------------------------