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This paper presents a method to salvage malfunctioned bits in a FinFET SRAM array caused by random threshold voltage (Vt) variation. The Vt of pass gates (PGs) is gradually lowered during the read process from the initial high value until the stored data is detected by the sense amplifier. As a result, the best Vt is automatically chosen for each cell and malfunctioned bits of both those too fast...
PVD-TiN gate FinFET SRAM half-cells with different β-ratios and fin-height controlled transistors have successfully been fabricated using orientation-dependent wet etching and selective recess RIE. It was found that read static noise margin (SNM) increases significantly by controlling β from 1 to 2. With further increasing β, read SNM increases slightly. On the other hand, write margin shows weak...
FinFET is considered as the most likely candidate to substitute bulk CMOS technology. FinFET-based design, however, requires special attention due to its exclusive properties such as width quantization and electrical confinement (quantum-mechanical effect) even in subthreshold regime. Considering these exclusive properties of FinFETs, the sources of process variations and their effects on FinFET-based...
TiN gate FinFET SRAM half-cells with different ??-ratios from 1-3 have successfully been fabricated by using the orientation dependent wet etching and conventional reactive sputtering, for the first time. It is experimentally found that static noise margin (SNM)at read condition increases with increasing ??-ratio due to the strength of pull-down transistor. To overcome SRAM cell size increment with...
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