There are many reasons and theories for why a lower voltage ESD discharge can upset a device while a higher voltage discharge does not. But, for whatever reason, this seems to be an accepted fact and is why many guys do ESD testing at low and high voltages.
Dave Cuthbert Micron Technology From: don_borow...@selinc.com [mailto:don_borow...@selinc.com] Sent: Tuesday, May 13, 2003 7:54 AM To: emc-p...@majordomo.ieee.org Subject: Re: ESD failure The other thing that can happen is that the discharge can take a different path. I have seen a technician succesfully discharge an ESD gun onto the connector pins of a sub-min D connector at low voltage, but only be able to hit the shell at higher voltage. Don Borowski Schweitzer Engineering Labs Pullman, WA "hansm" <hans.mellb...@baclcorp.com>@majordomo.ieee.org on 05/12/2003 06:17:32 PM Please respond to "hansm" <hans.mellb...@baclcorp.com> Sent by: owner-emc-p...@majordomo.ieee.org To: "Ravinder Ajmani" <ajm...@us.ibm.com>, <emc-p...@majordomo.ieee.org> cc: Subject: Re: ESD failure Both dV/dt and di/dt can have higher values at the lower voltages. This is one of the peculiar phenomenae of ESD. Hans Mellberg Engineering Manager This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
