good day all, Here is one from extreme left field: we coat one of our chips with a thermal spray process involving what is essentially a stream of molten ceramic material. The ceramic powder flows through a static dissipative tube and goes out the metal torch, where the flame heats it to molten state as it sprays. The molten spray is deposited on the chip package surface, which are mounted in a spinning aluminum wheel, which is grounded. Here is the question: Have any of you seen (or have) data that suggests that molten ceramic particles, flying through nitrogen-enriched air, generate static electricity, keeping in mind that the supply tube, the torch and the target are all grounded? Doug Pauls Rockwell --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------