Analysis of Tracking Phenomenon by DC in PCB and Attempt to Carbonization Delay Using Oxide Generated from Anode

초록

In the mobility industry, the proportion of electronic systems is increasing to improve eco-friendliness, safety and convenience, and fuel efficiency. A printed circuit board (PCB) is an important element for ensuring the performance of electronic systems, and when it is used in the mobility industry, high reliability is required compared to the environment. Therefore, the purpose of this study is to increase the reliability of the PCB by increasing the resistance of the PCB to tracking, which often occurs when used in harsh environments. The characteristics of the tracking phenomenon were investigated for a PCB with a DC current flow, and based on the results, a V-guard was built to strengthen the tracking resistance of the PCB and its performance and role were verified by experiments. Consequently, it was confirmed that the tracking resistance of the PCB was improved by up to 600% or more depending on the electrode distance. The V-Guard reduced the occurrence of discharge by staying more precipitate which impedes the current flow between the two electrodes. In addition, it was shown that the V-guard improves the resistance to tracking as a method of delaying the occurrence of carbonization due to discharge by holding the electrolyte at the tip of the electrode. The above results show that it is possible to develop an electronic board with improved resistance to the tracking phenomenon using a V-guard. This study has the great advantage of improving the resistance to tracking phenomena for PCBs used in harsh environments with a lot of moisture or dust by a completely different method other than the currently used coating.

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