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For the first time, internal spacers have been introduced in multichannel CMOSFET (MCFET) structures, featuring a decrease of the intrinsic CV/I delay by 39%. The process steps introduced for this new MCFET technological option are studied and optimized in order to achieve excellent ION/IOFF characteristics (NMOS: 2.33 mA/mum at 27 pA/mum and PMOS: 1.52 mA/mum at 38 pA/mum). A gate capacitance C gg reduction of 32% is measured, thanks to S-parameter extraction. Moreover, a significant improvement of the analogical figure of merit is measured compared with optimized fully depleted silicon-on-insulator planar reference; the voltage gain A VI( = gm/g ds) is improved by 92%.
Date of Publication: Feb. 2009