Limits of Discharge parameters in Short-gap Human-metal ESD at Special Charge Voltage

Discharge parameters, affected by electrode approach speed, appear their limits for charge voltage V_c =800 V in electrostatic discharge through a handheld-approaching-small rod from charged human body, which reveal the transition to avalanche from surface emission in short-gap ESD. Discharge process is dominated by avalanche phase for V_c = 800 V, which produce discharge current with blunt peak. Discharge parameters extreme values, analyzed with electric circuit theory, are results from mutual action of distributive capacitance and channel resistance across the gap during approach of the electrodes. Mutual action of distributive capacitance and non-linear channel resistance is the dominative cause for the existence of extreme values at special charge voltage V_c = 800 V. Circuit theory has been employed to elucidate the threshold phenomenon.