PRINTED BOARD WITH BUILT-IN CAPACITOR

摘要

According to the invention, a pair of electrodes (24, 25) each having numerous carbon nanotubes on one side are disposed in a case (21) in such a way that the carbon nanotubes (22) on one electrode (24) are opposed to the carbon nanotubes (23) on the other electrode (25) with a separator (26) interposed therebetween. The case (21) is filled with electrolyte, and the carbon nanotubes (22, 23) are impregnated with it. The electric double layer capacitor exhibits a capacitance of 3 mF/cm<2>. The electric double layer capacitor is incorporated in each of many through holes made in an insulating plate frame and arranged in a predetermined pattern. Therefore, these electric double layer capacitors can be connected near a high-speed operating element to a capacitor with a required capacitance. As a result, no special space for installing a capacitor is needed, and no long connection wiring between high-speed operation elements is needed.