Amorphous silicon based TFT and MIS nonvolatile memories
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The amorphous silicon (a-Si:H) TFT and MIS capacitor, which include an a-Si:H layer embedded in the silicon nitride gate dielectric layer, have been prepared and characterized for memory functions. Large shifts of the threshold voltage and flat band voltage were detected in the current-voltage and capacitance-voltage hysteresis measurements. The embedded a-Si:H film functioned as a charge retention medium that stores and releases injected carriers. The device's memory capacity varied with the thickness of the embedded a-Si:H layer and the sweep voltage. These low-cost memory devices can be used in many low-temperature prepared circuits. 2007 Materials Research Society.
AMORPHOUS AND POLYCRYSTALLINE THIN-FILM SILICON SCIENCE AND TECHNOLOGY 2007
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Kuo, Yue||Nominanda, Helinda