Dear Sir,
Right now we don’t have any tool to detect or correctly evaluate CDM. In other point of view, we can’t also “prove” that there is no CDM failures.
ANSI/ESD S20.20-2021 say that lower limit of 10^6 ohm should be considered if there is a concern of CDM.
Could you please suggest and advice here? Thanks a lot in advance.
Hi Sarban,
Out of curiosity what are you checking under CDM and how are you stressing it?
Regards
Cao
CDM events are considered metal to metal contacts. That is why the discharge is very fast and can generate a large current. Using a mat that is greater than 1x10*6 will dissipate some of the energy in the mat and reduce the current that can be generated.