FIGS. 5A and 5B are a plan view and a sectional view of an LCD pixel TFT or an OELD addressing TFT including a polycrystalline silicon active layer crystallized by MILC, which is connected to a storage capacitor simultaneously formed with the TFT. FIGS. 5A and 5B show a thin film transistor in the left-hand side and a capacitor structure in the right-hand side.