A process for computer-assisted teaching, which is also known as computer-aided-instruction and computer-based-training is disclosed. In the capacitor, a center axis of a threaded portion provided in a terminal block on the sealing plate is constituted to be parallel to a planar portion of the sealing plate. The stimulation may include vibrations, heating, cooling, expanding, or contracting of the device as necessary. The side from which the metal layer is removed is alternated with every metal layer that is deposited.