CDM, MM, HBM ESD for different test mode,

CDM: Charged Device Model, it is to point to the Device itself because of the charge accumulation, rapid discharge, cause the Device is damaged,

MM: the Machine Model, a charged conductor on the electrostatic discharge device, small resistance, large current, high energy,

HBM: the Human Body Model, charged the operator contact device pins, through a discharge device, causing damage to the device, the resistance is big, small current, releasing energy is low,