What's the characteristic for signal HBM, CDM, MM model?

Hi folks,

Hope everything goes well!

As we have to qualify the HBM/MM/CDM sensitivity levels for device(ICs) by using equipments which simulate real world discharging situation following ANSI/ESDA/JEDEC standards and each standard have instruction to use bandwidth 1G or 6G oscilloscope to measure signal, I wonder that what’s the characteristic of discharge signal of HBM, CDM, MM ? Have approximate value?

Characteristic includes: rise time, bandwidth, total discharging time and so on.

To my understanding, before we choose a meter to catch signal, we have to know signal’s nature.

Keep healthy and safe!
Thank you!

Bruce

One thing to mention is that MM is no longer required for module qualification. That standard practice has not been update for a while and is for reference only. HBM or CDM standards have the scope requirements and the required measurements to verify the waveform. They also include the test setup for verification. Is there something specific that is needed outside the standards?

Hi John,

Thank you for prompt reply. Great to recieve your feedback!

Back to basic, I wonder that why ANSI/ESDA/JEDEC standard decide to apply 1G or 6G bandwidth oscilloscope(CDM for example).

If 1G bandwidth OSC can be able to catch CDM discharge signal properly, why need 6G bandwidth OSC?
Is 6G bandwidth OSC enough to catch CDM event?

Keep healthy and safe!

Bruce

Bruce,

The quick answer, 6 Gig might not be fast enough to capture a CDM event. The reason for 6 Gig and 1 Gig is cost. When the standard was first written, the cost of equipment was very high. The decision was what could be done with to ensure repeatability and reproducibility at a reasonable cost.

More of a practical decision.

Hi John,

Thanks for your reply. In your opinion, how much OSC bandwidth(and sample rate, rise time) could capture CDM event properly?

As always, appreciate your feedback !

Bruce

Bruce,

To tell you the truth, I’m not sure. I don’t think that anyone knows how fast the CDM waveform really is. I will see if I can find out the answer and post it later. I would also encourage you to attend the CDM and HBM virtual committee meetings. The schedule for the meetings is on the ESDA website. They are all virtual and open to anyone.
John

Hi John,

Aslo HBM waveform OSC needed.

Thank you for kind reminder. I will consider to join virtual meeting! It’s really a great chance to know more knowledge.

Bruce

Please refer to the standard for the OSC requirements. They are downloadable from ESDA.ORG.

Hi John,

Thank you for updating new version S20.20 status yesterday. Learn a lot!

Bruce