0005 Generally, a unit cell area of a conventional semi conductor memory device may be
reduced to facilitate an increase in a storage capacity of the semiconductor memory device.
A reduction of the unit cell area of the semiconductor memory device may decrease a
capacitance of a cell capaci tor. Due to the decrease in capacitance of the cell capacitor,
electric charges stored in the cell capacitor may likewise be reduced. Thus, cell
characteristics of the semiconductor memory device may be affected by a manufacturing …