Sounds as if it may be that someone has no face mask on when coughing (serious). I had this happen once in a former life. Took a week to track it down. Brian Franklin D Asbell wrote: > > Happy Holidays people... hope things are going well for everyone... > > I have some questions regarding lifted resist problems, our Process > Engineer is quite convinced we have a resist lifting problem due to the > double-treat and drum-treat laminates we purchase. > > What we have been seeing are very isolated areas of resist lifting after > developing, areas down space lengths around 50 75 mils long. I have not > seen any total separation from the copper but I have seen lifted edges, > again, in very isolated areas, typically not more than 1 instance per > panel, and then only on appr 10% - 15% of the total panel lot. > > We identify this at AOI prior to etch. > > I don't have the camera here or i'd snap a few pics for you, even then I > don't think it'd turn out well as they are very small areas. > > Anyway, I find it hard to believe contaminates on foil, responsible for > lifting resist can occur in such minute areas and so infrequent > throughout the lot. > > Any assistance would be appreciated, thanks > > Franklin D Asbell > Network Circuits > Irving, Texas ~tucking the Cowboys banner down under the desk, out of > sight, grin~ > > --------------------------------------------------------------------------------- > 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 ---------------------------------------------------------------------------------