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Strain engineering has been in the heart of CMOS technology for over a decade. However, the effectiveness of conventional strain elements, such as stress liners, embedded S/D stressors, and stress memorization, is significantly reduced when device gate pitch is scaled below 100 nm as needed for 14nm node and beyond. Substrate strain engineering, where the channel itself is formed out of a strained...
The effects of high-level uniaxial tensile strain on the performance of gate-all-around (GAA) Si n-MOSFETs are investigated for nanowire (NW) diameters down to 8 nm. Suspended strained-Si NWs with ~2-GPa uniaxial tension were realized by nanopatterning-induced unilateral relaxation of ultrathin-body 30% strained-Si-directly-on-insulator substrates. Based on these NWs, GAA strained-Si n-MOSFETs were...
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