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For the first time we report extremely thin SOI (ETSOI) CMOS with 22 nm gate length (LG) and sub-100 nm contacted gate pitch for system-on-chip (SoC) applications. Multi-Vt transistors are demonstrated with competitive drive currents (NFET/PFET) of 1150/1050 µA/µm at Ioff = 100 nA/µm for high performance (HP) and 920/880 µA/µm at Ioff = 1 nA/µm for low power (LP), respectively, at VDD = 1 V. High...
We demonstrate the smallest FinFET SRAM cell size of 0.063 μm2 reported to date using optical lithography. The cell is fabricated with contacted gate pitch (CPP) scaled to 80 nm and fin pitch scaled to 40 nm for the first time using a state-of-the-art 300 mm tool set. A unique patterning scheme featuring double-expose, double-etch (DE2) sidewall image transfer (SIT) process is used for fin formation...
FinFET integration challenges and solutions are discussed for the 22 nm node and beyond. Fin dimension scaling is presented and the importance of the sidewall image transfer (SIT) technique is addressed. Diamond-shaped epi growth for the raised source-drain (RSD) is proposed to improve parasitic resistance (Rpara) degraded by 3-D structure with thin Si-body. The issue of Vt -mismatch is discussed...
We present a new ETSOI CMOS integration scheme. The new process flow incorporates all benefits from our previous unipolar work. Only a single mask level is required to form raised source/drain (RSD) and extensions for both NFET and PFET. Another new feature of this work is the incorporation of two strain techniques to boost performance, (1) Si:C RSD for NFET and SiGe RSD for PFET, and (2) enhanced...
We demonstrate 22 nm node technology compatible, fully functional 0.1 mum2 6T-SRAM cell using high-NA immersion lithography and state-of-the-art 300 mm tooling. The cell exhibits a static noise margin (SNM) of 220 mV at Vdd=0.9 V. We also present a 0.09 mum2 cell with SNM of 160 mV at Vdd=0.9 V demonstrating the scalability of the design with the same layout. This is the world's smallest 6T-SRAM cell...
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