I think that it is really important to remember that using IC testing will measure your process capability and is a tool to verify that your process is in control. IE that you are not adding any contaminants to your board. I disagree that the numbers CSL or IPC 610 has come up with mean anything though - if you tested a complete assembly and the chloride levels per cm squared were grossly higher than a published number this doesn't really mean that you suddenly have a problem. It means you have alot work left to do in order to determine if there is a problem. Three months down the road if the number is the same you can feel comfortable that your process hasn't changed. The biggest thing I feel about IC testing is that it is like a computer, it will only tell you what you tell it to. It is not a miracle test and will not solve your problems for you, apply common sense and engineering practice with a grain of salt ; ) --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------