Electric dual layer capacitor and manufacture thereof

PURPOSE: To obtain an ultrathin film electric dual layer capacitor by a method wherein two active carbon thick film patterns are formed at an interval on an insulating substrate so as to be immersed in a sealed electrolyte for filling the role of a pair of polarization electrodes. CONSTITUTION: An alumina made insulating substrate 1 in specific thickness is coated with an Au conductive paste after specific pattern and then heat- treated to be formed into a conductive layer 2. Next, phenol base active carbon particles, phenol base resin particles and specific amount of methyl cellosolve are mixed with one another in a pasty state. Next, this conductive layer 2 excluding the protrusions is coated with the pasty mixture after the same pattern to be thermoset and then heat-treated to be formed into active carbon thick films 3. Next, the whole body is held by a plastic film 4 and then the three ways excluding the side having a terminal plates leading out part are heat-treated so that sulfuric acid water solution may be poured from the unsealed part to be left in vacuum state for impregnating the inside of the active carbon thick films 3 with an electrolyte. Finally, the unsealed part is to be heat-sealed. COPYRIGHT: (C)1993,JPO&Japio