How to measure and evaluate the electrostatic characteristics of ion wind guns
With the emergence of ion wind guns and antistatic materials, ion wind guns play an important role in the generation of static electricity in the electronics industry. How to measure and evaluate the electrostatic characteristics of ion wind guns?
The evaluation of the electrostatic performance of the ion wind gun can be roughly attributed to the two aspects of the amount of electricity generated and the speed of charge leakage. The difference in the charge generation process determines the difference in the way it is attenuated. Usually in the process of prevention, the note involves the frictional charging process, which is related to the deeper energy level trap inside the material; however, the reproducibility of the frictional charge mitigation process is poor, so it has to adopt a reproducible corona charging the way. In addition, when judging these measured values, it is necessary to ascertain what kind of pre-treatment the sample has undergone, whether the use in the field is in a coordinated state with the above characteristic experiment, and the like.
It is worth noting that the charged components of the ion wind gun are not static. The results measured in the laboratory are not always consistent with what happens at the scene. Under actual environmental conditions, how the behavior of static electricity will occur and proceed must be judged and considered according to the site conditions. This is also essential when investigating the electrostatic properties of materials.
Among the materials used in the electronics industry, it is important to evaluate their resistance characteristics. At present, in the electrostatic measurement, the method used is similar to the method of measuring resistance generally. However, since the current flowing through the sample is small, it is necessary to select the measuring electrode for different purposes.
When the ion wind gun is being measured, current will flow through the internal counter surface of the sample. Therefore, the generally measured results are divided into surface resistance and bulk resistance. The so-called body resistance is the voltage applied by the two electrodes divided by the current value flowing through the inside of the sample. The surface resistance should be the voltage divided by the current flowing through the surface of the sample. The methods of measurement are voltage-current meter method; comparison method, bridge method, and the like.