When I read IPC Standards regarding conformal coating requirements for the different classes, all I can find is coating thickness on a board. I'm trying to work to class 3 standards for conformal coating and am meeting those thickness requirements, however, I have to wonder how it works on a BGA for example, where the coating thickness is sufficient but doesn't completely cover and encapsulate the component. In other words, there is a gap between the top of the BGA and the PCB. Any thoughts on this would be appreciated. Thanks, Mike Manwell --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------