Layer to layer misregistration allowance depends on the design... The old mil spec use to call for 0.0140". But depending on im,pedance control, pad and hole sizes... It can vary... a lot! Alain Savard CAE Montreal -----Original Message----- From: Lam, Patrick [mailto:[log in to unmask]] Sent: March 12, 2001 1:01 PM To: [log in to unmask] Subject: [TN] Layer to Layer registration Can someone tell me: What is the maximum layer to layer mis-registration allowance for a 6-layer PCB? I have been specifying 0.0015", is asked to change to 0.003" by a new supplier. I forgot where I got that 0.0015. Please help! Patrick Lam Phone:(604)293.4392 ---------------------------------------------------------------------------- ----- Technet 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 Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet 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 Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------