We have some boards that are coming from the assembly house that are failing test. We suspect that there is residue from the flux still on the board. I believe my assembly house uses a cleanable no-clean solder. These are high voltage boards. I am very ignorant in this area and this is all of the information my boss is telling me. These boards used to be built in house and worked. They started failing after outsourcing our assemblies. Can someone give me some information and or links so I can educate myself on this subject. My boss wants me to come up with a cleaning specification for our printed circuit assemblies. I do not even know enough to ask questions. Any help will be greatly appreciated. Thanks, Todd Schwarzkopf, C.I.D. PCB Designer PerkinElmer Instruments 801 S. Illinois Ave. Oak Ridge, TN 37831-0895 [log in to unmask] Voice: (865) 481-2427 Fax: (865) 481-2438 --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------