| dc.description.abstract | Aluminum electrolyte capacitors with conducting polymer as a solid electrolyte has the advantages of high frequency characteristic, high thermal stability, long life-time, and miniaturizeable potentials. However, due to the poor adhesion between electrolyte and substrate, the so-call interface loss occurs. Moreover, the relatively low conductivity of the conducting polymer cause the higher internal resistance, affects the performance of the capacitor. In this study, we propose four methods to solve these problems. They are: (1) Modified the dielectric layer with organic compound to improve the adhesion between polymer and dielectric layer; (2) Adding organic solvent to decrease the rate of polymerization. Therefore, the denser polymer film was formed, the resistance of the capacitor will be reduced; (3) Choosing proper doping acid to increase the conductivity of polyaniline, reduce the resistance of the capacitor; (4) Using multiple-step polymerization/deposition procedure to increase the coverage of the polyaniline films, increasing the capacitance of the capacitor. The results showed that the modification of dielectric layer with organic carboxylic acid or organic phosphobic acid can improve the adhesion between polymer electrolyte and dielectric layer, decreasing the internal resistance and DF value of the capacitor. Adding small amount of organic solvent (alcohol) during the polymerization/deposition process can also decrease the DF value of the capacitor. Furthermore, using multiple-step polymerization/deposition procedure can improve the coverage of the polyaniline films therefore, increase the capacity significantly. | en_US |