Hi folks, I'm investigating the feasibility of implementing SPC on cleaning operations and was wondering what the rest of you are doing, if anything. What types of SPC activities, if any, are you doing on your cleaning operations? Have any of you tried SPC on cleaning operations? If so, what kind of results did you have? Did you find it worth while? What measurements would be useful for monitoring process drift so that you can correct the process before it starts producing less than clean boards? For SPC activities, we've kicked around the possibility of monitoring board cleanliness at the end of the cleaning operation, measuring solvent/fluid quality, monitoring various machine parameters. We have two major pieces of cleaning equipment used to clean RMA flux from CCAs - a co-solvent vapor degreaser, and a semi-aqueous in-line cleaner. We currently do a cleanliness test (Omegameter or Ionograph) on each lot of boards. We also record various gage readings on the in-line cleaner on a daily basis. Thanks for any light you can shed on this issue. Kathie Lambert Process Engineer Northrop Grumman Baltimore, MD 410-765-9746 ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8d ############################################################## 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 web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################