A dry etching step during the manufacturing of a substrate for a liquid crystal display device is improved by placing the substrate at a predetermined distance away from the lower electrode to prevent damage of the substrate due to electrostatic formed therebetween. The method includes estimating, based on the parsing, a size aspect that the content will have when presented in the graphical user interface. The active layer switches from the low-impedance state to the high-impedance state when an amplitude of an erasing signal having opposite polarity with respect to the writing signal exceeds an erasing threshold level, to enable erasing information from the memory cell.