At this point, the polymer absorbed oxygen and generated insulating materials, which isolated the defective portion from the remainder of the capacitor. Despite the loss of some effective capacitance, the self-healing process had a negligible impact on the overall performance, while substantially reducing the LC [40, 41].
Capacitors made of metallized polypropylene films suffer partial discharges, called self-healing, due to weak electrical defects. Those defects are destroyed by an electrical arc that extinguishes when enough metal of the electrodes is vapourized around this point.
Therefore, there is a growing need for high-performance capacitors with low ESR . Tantalum electrolytic capacitors (TECs) have gained popularity due to their exceptional electrical performance, reliability, and high capacitance density .
This method has the advantages of low cost, simple fabrication, and high performance, and has the potential to be applied in the large-scale production of integrated thin-film capacitors in the future. The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
The effect of electroplating conditions on the electrical properties of the tantalum electrolytic capacitors (TECs) was comprehensively studied. The results demonstrated that incorporating a copper metal layer into the structure of the capacitors significantly reduced the ESR of TECs.
Moreover, the Dissipation Factor (DF) of the capacitor was also enhanced. The utilization of a conductive polymer as the cathode layer provided the capacitors with self-healing characteristics that significantly decreased the leakage current (LC) in the capacitor.