Technetters: A question for all pcb fab experts. Having a disagreement in house on the importance of a D.I. rinse (compared to a fresh water rinse) after chem. clean for inner layer cores prior to resist application. How important is a D.I. rinse or rinses. Your input is very much appreciated. Thanks Frank Conti Quality Process Tech. Triangle Circuits of Pgh. Phone: 412.828.5322 ext 627 E-Mail: [log in to unmask] --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------