Experimental Research On Influencing Factors Of Ultra-low Human Static Electricity Starting Voltage

The problem of static electricity has always been a problem that cannot be ignored in the industrial field(especially in the field of semiconductors).With the continuous upgrading of China's electronics industry,electronic components will become smaller and more precise,and its electrostatic sensitivity is constantly increasing,and static electricity.The proportion of ultrasensitive components is also increasing.Therefore,China must establish its own protection standards and certification systems in the field of electrostatic super-sensitivity.This requires not only in-depth research on the principle of electrostatic charging,but also the support of a large number of experiments and data.Therefore,this article starts with the principle of the electrification process of the Human Body Model(HBM),and finds that the electrostatic charging of the human body is the result of the dynamic balance of the two processes of electrostatic charge accumulation and dissipation.If the human body continuously conducts electrification actions(such as continuous walking),the amount of static charge carried by the human body will approach saturation.At this time,the electrostatic voltage of the human body is related to the human body electrification rate and the human body 's resistance to earth leakage.The accumulation process of human body static electricity and the leakage resistance of human body affect the dissipation process of human body static electricity.Then analyze some factors that affect the human body's electrification rate and human body's leakage resistance when walking,and list these factors as experimental parameters,and refer to the six-walk walking mode specified in the current standard to start the experiment.The experiment found that the walking voltage of the human body is roughly proportional to the resistance of the human body to the ground,and its proportional coefficient is the average electrification rate of the human body during continuous walking;the walking voltage of the human body and the resistance value of the human body to the ground will increase with the ambient temperature and relative humidity.The decrease,and the decrease trend is better,showing an exponential function relationship;but the relative humidity will hardly affect the electrification rate when the human body is walking,and the increase in the ambient temperature will increase the electrification rate of the human body.In order to control the electrification of the human body in the electrostatic protection zone,other electrification actions of scientific research staff in the electrostatic protection zone were also analyzed,such as random walking,separation of the coat from the seat,lifting of feet and taking off the coat,etc.;Taking the human walking voltage as a random variable,extrapolate it from the perspective of probability statistics to estimate the maximum starting voltage that the human body may reach during long-term walking.Finally,based on the above two points,the existing electrostatic protection area is evaluated and suggested.