The Test Method And Performance Parameter Of A New Type Of Film-like ESD Suppressor

With the development of electronic technology, the problem of Electrostatic Discharge(ESD) has become increasingly prominent. The integrated development of electronic products increases their sensitivity, which makes electrostatic protective design harder. Currently using ESD protection devices is one of the most direct and effective solution, helping to improve system immunity. In order to test the performance of a new type of film-like ESD suppressor, this article does a series of research work as for the basic principle, test method, result discussion and result comparison, mainly divided into the following two parts:(1) Study on test methods of ESD protection performance. The human-body metal model(HMM) system and transmission line pulse(TLP) system are built. And further research is running by experiment. HMM system can simulate real electrostatic discharge phenomenon and provide transient test. A series of detailed protective parameters will be obtained in one pulse test. The HMM system is easy to operate, but lack of accuracy. The discharge voltage in the HMM system has a certain effect on the clamping voltage, peak voltage, and dissipated power, but is not related to the key parameters, such as response time, turn-on resistance, and the holding point. TLP system provides temporary stabilization test. Using calculated current instead of measured current will reduce the number of test equipments, and improve the system accuracy. TLP system obtains more comprehensive parameters, but is different from the real discharge phenomenon.In order to analyze the correlation between the two systems, test the same device in the two systems. The results show that the two systems have good consistency and they can be replaced for each other for the device that responses quickly, but there are certain differences for the slow-response device whose transient characters are different from temporary stabilized one.(2) The performance analysis of a new type of film-like ESD suppressor. The suppressor combines polymer with conductive material with nanotechnology. The tunnel effect inside makes it show different electric conductivities with different voltage, so that it can provide ESD protection. Test board is designed. Its protective performance parameters are measured and compared with TVS diodes and varistors. The new ESD suppressor has high insulation resistance and low parasitic capacitance, showing good transparency. It is placed between ground and signal layer directly, avoiding the use of a large number of ESD protection devices. This suppressor does not take up on the board area and is good for product integration and saves cost. Compared with TVS diode and varistor, the suppressor has a poorer stability, higher trigger voltage and wider ESD protection design window, the ESD protective performance remains to be improved.