Dozens of decoupling capacitors in combinations that included aluminum electrolytic capacitors used at 100 kHz or less, tantalum capacitors in the 100 kHz to 10 MHz band, and ceramic capacitors corresponding to 100 MHz to 1 GHz or more were finally used to suppress noise. In contrast, one type of Proadlizer can cover a frequency area of dozens of KHz to 1 GHz that used to be covered by several types of decoupling capacitors. As well as featuring a lower impedance of the total frequency area than the conventional synthesized capacitor, it has a very flat characteristic. Due to these superior features, the Proadlizer is able to provide an even more stable power line. This allows several Proadlizers to replace dozens of capacitors. In other words, the Proadlizer not only realizes compactness and flexibility but also reduces the board mounting load and contributes to enhanced reliability. The Proadlizer is composed of the same material as the conductive polymer tantalum capacitor "NeoCapacitor," which reduces internal resistance using a polymer. However, the Proadlizer has a unique shape that is similar to the structure of a filter to which three or four terminals are attached to a sheet-type electrode. This structure is the secret to the superior characteristic, producing an effect equivalent to that of many fine capacitors being arranged along a power line. In other words, electric charges stored close to the CPU are used for high-speed power supply and those stored gradually farther away are used when low-speed, large-volume power supply is required. The concept of this device structure previously existed for ceramic-based, anti-noise components of 1 GHz or higher, but not for large-capacity electrolytic capacitors of from 100 to 200μF. This was due to the common belief that large-capacity capacitors were slow and applicable only in specific fields. The use of this structure marked a drastic change, one that only NEC TOKIN, with its long-term experience in anti-noise measures and solid electrolytic capacitor technologies, could make.