Silicon Chips depend on the electric current moving in VERY controlled ways to function, and ANY impurity within the Silicon can destroy functionality. Chlorine gas can probably penetrate into the Silicon, and once there move quite easily, thereby totally screwing up the functioning of the chip. This problem of some atom, unknown, penetrating the chips, and fouling things up, is why the chemicals used in chips have to purer than anything we in circuit boards ever dreamed of. The most common problem is Sodium, and it is often joked about, but never too loudly, that you could shut a chip manufacturer down completely by walking in and just yelling the word "Sodium". Rudy Sedlak RD Chemical Company *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************