A memory device that is comprised of a dynamic random access memory (DRAM) capacitor
and a nitride read only memory (NROM) transistor. The memory device provides multiple
modes of operation including a DRAM mode using the capacitor and a non-volatile
random access memory mode using the NROM transistor. The device is comprised of
two source/drain regions between which a gate insulator layer is formed. A control
gate, coupled to a word line, is formed on top of the gate insulator. The DRAM
capacitor is coupled to one of the source/drain regions while the second source/drain
region is coupled to a bit line that is eventually coupled to a sense amplifier
for reading the state or states of the memory device.