correct, if 20% or more of the trace is missing, for whatever reason, i would consider it a reject. definitely communicate back to your vendor on this issue (i'm sure you will), especially is its repeating itself panel after panel. sounds like contamination or a flaw in the artwork.. -----Original Message----- From: Stephen R. Gregory [mailto:[log in to unmask]] Sent: Tuesday, March 14, 2000 10:52 AM To: [log in to unmask] Subject: [TN] Etched "Notches" or "Nicks" in copper traces Hi ya'll! I gotta board here that has a problem with the traces, it looks something like this: Nick in the Trace | V ___ ________________ ___,/ \ \_/ | <-------This is supposed to be a via.. ______________________, | \___/ (I hope my "ascii cad" conveys what I'm trying to show) Reading the IPC-A-600F at 2.10.1.1 Conductor width it says for class 2 and 3 it is acceptable when; "Any combination of isolated edge roughness, nicks, pin holes, and scratches exposing the base material that reduces the conductor width by 20% of the minimum value or less." So I'm reading this correctly, if the nick reduces the trace width by more than 20% of the overall trace width, it is a reject...right? This "nick" seems to have been etched like this...it's at the same place on the same board that's in a 4-up panel. The other 3-boards in the panel don't have this "nick". Booger on the artwork or something huh? Just want to be sure... -Steve Gregory- ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - 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 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################