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: [email protected] [mailto:[email protected]] Sent: Tuesday, May 13, 2003 7:54 AM To: [email protected] 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" <[email protected]>@majordomo.ieee.org on 05/12/2003 06:17:32 PM Please respond to "hansm" <[email protected]> Sent by: [email protected] To: "Ravinder Ajmani" <[email protected]>, <[email protected]> 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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
