An electrical double layer capacitor is provided which is capable of ensuring its reliability and providing increased energy density per unit volume of a capacitor. Each hole has at least one open end terminating at the light emitting surface or the bottom surface. Another embodiment of a needle comb reticle pattern includes a box-in-box feature flanked on two adjacent sides by needle combs with tapered flat-tipped needles and flanked on the other two adjacent sides by reference bars. The blind is installed inside the air tight chamber formed by two sheets of glass. The verify operation applies the verify voltage to the selected wordline at least two different times to divide the selected memory cells into at least three regions corresponding to different threshold voltage ranges.