Abstract
Operation characteristics in a polycrystalline silicon (poly-Si) nanowire (NW) charge-trapping (CT) flash memory device are studied with SiGe buried channel for the first time. Compared with the flash device with a general poly-Si NW channel, the device with SiGe buried channel shows improved programming and erasing speeds since the enhanced electric field in tunneling layer is enhanced by SiGe buried layer. The endurance characteristics are also improved by the SiGe buried channel while retention performances are retained. The SiGe buried channel is promising to CT flash device for 3D nonvolatile memory applications.
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