I have three questions I hope someone can help me with: 1) We have a vendor that uses "city water" directly into their SMT PCA washer. I believe DI water is industry standard. Does anyone know if it is documented anywhere? Spec? 2) We had an issue where there was Chlorine contamination and gold dendrites found inside some standard gull-wing 6 pin SMT ICs. This issue seems to be batch related. The chip manufacturer claims that chlorine is never used in their process. Should the SMT process expect to handle the possibility that the wash solution may get into a part? The PCA vendor uses unfiltered "city water", with no cleaner, in the wash process and does a ROSE test on one board of each lot. Since the ROSE test passes, the PCA vendor is blaming the part manufacturer for having "leaky" parts, since the thinking is the wash is getting into the part and trapped. 3) One issue I have is the water pressure in the wash is 80-100 psi. I think this is too strong, and should be half of that? You want to flood the board with water, not hit the board and bounce off? Thank you in advance. Best Regards, Michael Forrester Sr. Product Engineer ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------