Hi Josh, Why can't you make changes to the equipment? We have found that how the etcher is "setup" can cause significant variations in conductor widths. Parameters such as spray pressures, nozzle type, nozzle orientation, oscillation rate, and roller configuration affect the uniformity of the finished conductor widths. Please feel free to contact me if you have any questions. Tim Estes Conductor Analysis Technologies Inc. Phone: 505-294-6936 Fax: 505-294-6596 Email: [log in to unmask] Web: http://biz.swcp.com/cat -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of [log in to unmask] Sent: Thursday, November 05, 1998 10:34 PM To: [log in to unmask] Subject: [TN] FAB: Cupric Chloride etching 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 ################################################################