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We report the first demonstration of 3D ICs formed by the direct bonding of NFET and PFET prepared on separate layers. Hybrid bonding of Au/SiO2 at a low temperature of 200 °C allows direct connection of NFETs and PFETs after completion of the FET process without area penalty. We have demonstrated successful operation of a 3D CMOS inverter bonded through 3-μm-diameter Au electrodes and a ring oscillator...
We report TaCx/HfSiON gate stack CMOS device with simplified gate 1st process from the viewpoints of fixed charge generation and its impact on the device performance. Moderate Metal Gate / High-K dielectric (MG/HK) interface reaction is found to be a dominant factor to improve device performance. By optimizing TaCx composition, fixed charge free TaCx/HfSiON device is successfully fabricated. Also,...
Low temperature device operation at 240 - 300 K temperature range is a promising approach to extend the device technology. The guideline of device design for cooling CMOS and the optimum operation temperature considering total power consumption is discussed for the first time. Also, the compatibility of cooling CMOS with advanced high-k gate dielectrics and embedded SiGe S/D technique are clarified
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