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ReRAM has been researched as a promising candidate for diverse NVM application [1]. Still switching mechanism and classification are not clear, there are simply two kinds of switching polarity: unipolar and bipolar. Considering distribution, operation margin and so on, bipolar switching looks much attractive than unipolar. Along with a selective device, polarity of switching could make the architecture...
RTS (random telegraph signal)-like fluctuation in Gate Induced Drain Leakage (GIDL) current of Saddle-Fin (S-Fin) type DRAM cell transistor was investigated for the first time. Furthermore, two types of fluctuation which have apparently different ??high (average time duration of high leakage state) to ??low (average time duration of low leakage state) ratio were investigated, and it was found that...
44 nm feature sized 8F2 1Gb DRAM is fully integrated and functioned for the first time with the smallest cell size of 0.015 um2. A novel cell-transistor structure and new DRAM process technologies are developed. In order to control the threshold voltage uniformity and body-bias sensitivity of saddle-fin cell-transistor, the channel doping profile and saddle-fin geometric dependency were analytically...
We have experimentally analyzed the leakage mechanism and device degradations caused by the F-N and hot carrier stresses for the recently developed DRAM cell transistors having deeply recessed channels. We have found the important difference of the leakage mechanism between S-Fin and RCAT, which have each structural benefit in the characteristics of leakage current, so we can suggest the guide lines...
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