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This paper proposes a novel vertical MOSFET with the middle partial insulation and block oxide (bMPI) structure for 1T-DRAM application. The bMPI 1T-DRAM can increase the pseudo-neutral region due to the bMPI under the vertical channel and its device sensing current window is improved about 95% when compared to the planer bMPI 1T-DRAM. Because of the double gate structure, the proposed device has...
We have observed new charge trapping phenomena in sub-80-nm DRAM recessed- channel-array-transistor (RCAT) after Fowler-Nordheim (FN) stress. Gate stack process strongly affected the charge trapping and the trap generating in oxide bulk and interface of RCAT. According to the trapped charges and/or the generated traps after FN stress, the data retention time and writing capabilities of DRAM were dramatically...
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