Hi Susan, I'll take a stab at your question strictly from a "user's" point of view. Typically there are quite a few assumptions that are made in any attempt to use a no-clean flux and/or establish a no-clean process. The assumptions that I am referring to are related to the integrity of the test(s) methodology(ies), the integrity of the PCB fabricator, the integrity of the flux manufacturer, the integrity of the testing/qualification facility (such as yourself), and the integrity of the user (such as myself). All of these together form an equation that hopefully provides adequate checks and balances. Without getting into a lot of semantics, I'll state that I would heavily rely upon your prognosis (you have a lot of experience, more data points and see a large population of chemistry combinations) in determining the cause, source, and possible remedy if my samples provided high levels of any halide or other corrosive residue. In closing, I will state that as a potential user of no-clean chemistries, understand your process as much as possible and choose your analytical methods wisely. In this case choose your sources wisely and rely upon those sources with confidence. But remember, if one integrity isn't there, be sure you're able to not only detect it but fix it. To answer your question directly, I would hope that I had done my homework and put the brunt of the burden on you! Steve Sauer Sr. Mfg. Engineer Xetron Corporation [log in to unmask] ---------- From: [log in to unmask][SMTP:[log in to unmask]] Sent: Monday, October 12, 1998 3:48 PM To: [log in to unmask] Subject: Re: [TN] Ionic Contamination due to No-Clean Fluxes Just a question for the group regarding bromide ions found as a result of ionic cleanliness testing. How do you know if the Br come from a fusing fluid or some other process chemical OR was the extraction process used too agressive and broke down the flame retardent compound in the resin system????? Susan Mansilla Robisan Lab ################################################################ 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 ################################################################