Dear Josh: I would recommend contacting OXFORD V.U.E, INC. at 626-256-6557. They have lots of good data regarding etching speed, undercut, and control methods. Regards, Ted Stern [log in to unmask] wrote: > > I'm new at cupric etching. What are the parameters for the average innerlayer > etch line? What controls should I be monitoring, for example, normality, > copper content, etc? What ranges will provide me the best process in terms of > etch line quality (minimum copper foot with best possible line width > uniformity and etch speed)? I know equipment has a lot to do with the > results; we can't change equipment, so I'm looking to improve quality with > chemistry. > > Thanks. > > ################################################################ > TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. > For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 > ################################################################ ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################