Tantalum Electrolytic Capacitor With A New Polymer Electrode Material

By examining the new generation condutive polymer material 3,4—polyethylene dioxythiophene (PEDT), this paper investigated the EDT monomer synthetic path and the optimum filming conditions of the compound PEDT. Based on this research, I also discussed the manufacturing processes and the related principles of the solid tantalum capacitors, when replacing the conventional inorganic material MnO2 with the PEDT as the negative pole. (1) Two EDT monomer synthetic paths have been investigated. (2) Using the method of depositing the PEDT film on the glass base, the affect of processing and environmental conditions --such as the polymerizing temperature, the state of the polymer material, the polymerization correctives, the drying temperature, and the amount of the solution etc. -- to the PEDT material's electroconductivity has also been examined in this paper. (3) By exploring the filming processes of the PEDT negative pole, this paper, creatively using the vacuum single step method, has found a comparatively suitable processing condition. In conclusion, based on the application of the PEDT material on the solid tantalum capacitors, this paper has investigated their related principles and varieties of processing conditions. This has provided an essential work for the further research on the organic tantalum capacitors and its manufacturing.