Ravinder, I can attest to the 2kV ESD immunity of ICs because I have done such tests myself. I am now in the process of trying to raise the ESD immunity level to 4kV on one particular pin.
Have you - or anyone else on this group - had any experience working with small surface mount varistors (EIA 0603 or 0805 size) specifically for ESD protection. I have only ever worked with large disc varistors primarily for surge protection (EN61000-4-5) and therefore a little sceptical about the effectiveness of an 0603 device at 4kV although I imagine they should be able to deal with ESD (EN 61000-4-2). Any advice? Regards - Chris -----Original Message----- From: Ravinder Ajmani [SMTP:[email protected]] Sent: Monday, October 01, 2001 7:45 PM To: EMC-PSTC Subject: Re: Component ESD Immunity Testing I have been asked on several occasions to test some particular IC on the card, whenever there have been instances of IC failures during product manufacturing/testing. Most ICs are built to withstand an ESD event of 2 kV, and I have found this to be true in my tests. If IC happens to be OK then I try to improve the card design to reduce/eliminate the product failures. Regards, Ravinder PCB Development and Design Department IBM Corporation Email: [email protected] *************************************************************************** Always do right. This will gratify some people and astonish the rest. ..... Mark Twain [email protected] (Patrick Lawler) To: EMC-PSTC <[email protected]> Sent by: cc: owner-emc-pstc@majordom Subject: Re: Component ESD Immunity Testing o.ieee.org 10/01/2001 08:27 AM Please respond to plawler We have an engineer who did ESD testing once on the pins of ICs buried in a power supply assembly. The unit passed, and he thought it was a great way to show product robustness. However, when I asked him if he would redesign power supplies that failed his special test, he replied he wouldn't. Would _you_ redesign your system if it failed? ---- Patrick Lawler [email protected] On Mon, 1 Oct 2001 08:02:10 -0600 , "Aschenberg, Mat" <[email protected]> wrote: >Since all of you have your ESD hats on..... > >Are there standards for testing of components on a pwb? There is some >concern here that we should be testing individual components on the pwb. > >Thanks for your help. >Mat Aschenberg ------------------------------------------- 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: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. ------------------------------------------- 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: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. _____________________________________________________________________ This message has been checked for all known viruses by Star Internet delivered through the MessageLabs Virus Scanning Service. For further information visit http://www.star.net.uk/stats.asp or alternatively call Star Internet for details on the Virus Scanning Service. _____________________________________________________________________ This message has been checked for all known viruses by Star Internet delivered through the MessageLabs Virus Scanning Service. For further information visit http://www.star.net.uk/stats.asp or alternatively call Star Internet for details on the Virus Scanning Service. ------------------------------------------- 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: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
