Electron Transport Properties of Ultrathin-body and Tri-gate SOI nMOSFETs with Biaxial and Uniaxial Strain

Electron transport properties in biaxially strained UTB MOSFETs and uniaxially strained tri-gate MOSFETs are experimentally investigated. It is found that the strain is still effective even in UTB regime and the mobility enhancement of 1.4 against control thick (20 nm) SOI is preserved in devices with T
_Soi
= 2.4 nm. We also demonstrate 2.0x mobility enhancement in tri-gate nMOSFETs with uniaxial <110> tensile strain that is favored not only on (100) but also on (110) sidewall