Charles is right. Quite often the fields from the discharge will disturb your device even if the discharge itself is safely routed away. Does discharge to the horizontal or vertical coupling planes cause problems? Regards, Rob Oglesbee Radian Research (765) 449-5505 This message, and any attachments to it, may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are notified that any use, dissemination, distribution, copying, or communication of this message is strictly prohibited. If you have received this message in error, please notify the sender immediately by return e-mail or call 765-449-5500 and delete the message and any attachments. Thank you. -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Grasso, Charles Sent: Friday, September 26, 2014 5:12 PM To: n.rameshhwde@xxxxxxxxx; si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: ESD failure - need advise Hello Ramesh - Your best bet is to prevent the discharge from occurring in the first place. Unless the addition of insulation barriers will affect your cooling, I suggest you either block the airgaps in the tool (i.e remove the holes) or add insulation over the board area that is affected. Best Regards Charles Grasso Compliance Engineer Echostar Communications (w) 303-706-5467 (c) 303-204-2974 (t) 3032042974@xxxxxxxxx (e) charles.grasso@xxxxxxxxxxxx (e2) chasgrasso@xxxxxxxxx ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu