A method for producing a capacitor comprises providing a raw structure having a substrate and at least one dielectric layer, wherein a first area and a second area of the substrate are separated by an isolating layer. By varying a position interval of data pointers according to a data rate, an error probability due to a noise can be reduced and a speech quality can be improved. At the time of the above-described printing, even if the printing condition is set for the image data, the designation of the above-described printing mode allows the printing condition suitable for scanning the printing material to be set. Advantageously, a constant gate voltage value is concurrently applied to the gate terminals of said cells, such that the cell programming time is unrelated to the threshold level sought.