Abstract
The current–voltage (I–V) characteristics of a metal-insulator-metal type thin-film diode (TFD) could not be simply described by the Poole-Frenkel equation using the apparent thickness of the oxide film. If the effective thicknesses of the oxide film for the determination of terms α and β in the equation are appropriately estimated, the I–V characteristics of the TFD element can be explained by the Poole-Frenkel equation. It was found that the optimum design parameters could easily be estimated by this new formula for a liquid-crystal display with the TFD element.