Even for GGMOS or any other structure both of these cases are equal.
Suppose you are inside of black box that has two wires from outside. And you noticed trough these wires somebody outside apllies 5V pulses. Can you recognize they are negative or positive. So the device will response to the voltage difference only. But difference the same for both cases.
Hi Fom,
For my ESD test, I found when I exert the negative ZAP from pin1 to pin2, I found the pin2 failed. But when exert the positive ZAP from pin2 to pin1, it is OK.
How many devices did test?