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This work introduces an analytical approach to model the random threshold voltage (Vth) fluctuations in emerging high-k/metal-gate devices caused by the dependency of metal work-function (WF) on its grain orientations. It is shown that such variations can be modeled by a multi-nomial distribution where the key parameters of its probability distribution function (pdf) can be calculated in terms of...
The logic gate threshold voltage controllable single metal gate FinFET CMOS inverter constructed by the 3T-PMOS and 4T-NMOS have successfully been fabricated. The accurate current matching and the logic gate threshold voltage tuning by Vg2 in the 4T-NMOS have been demonstrated. A higher WF metal would be more suitable for the proposed FinFET CMOS.
We propose a flexible-pass-gate (Flex-PG) FinFET SRAM to enhance both the read and write noise margins. The flip-flop in the Flex-PG SRAM cell consists of usual FinFETs while its pass gates consist of Vth-controllable four-terminal (4T) FinFETs with independent double-gates. We experimentally demonstrate that the proposed Flex-PG SRAM increases both the read and write margins by controlling the Vth...
Dual metal gate CMOS FinFETs have been integrated successfully by the Ta/Mo interdiffusion technology. For the first time, low-Vt CMOS FinFETs representing on-current enhancement and high-Vt CMOS FinFETs reducing stand-by power dramatically, namely multi-Vt CMOS FinFETs, are demonstrated by selecting Ta/Mo gates for n or pMOS FinFETs with non-doped fin channels. The dual metal gate FinFET SRAM with...
An independent-gate four-terminal FinFET SRAM have been successfully fabricated for drastic leakage current reduction. The new SRAM is consisted of a four-terminal (4T-) FinFET which has a flexible Vth controllability. The 4T-FinFET with a TiN metal gate is fabricated by a newly developed gate separation etching process. By appropriately controlling the Vth of the 4T-FinFET, we have successfully demonstrated...
In this paper, Ta/Mo interdiffusion dual metal-gate technology, which has an advantage in realizing dual gate work functions without etching of metals from the gate dielectrics, has been introduced for a FinFET. Gate-first fabrication of the FinFET was successfully implemented by optimizing the deposition and patterning of the Mo and Ta/Mo metal gates on the ultra- thin fin channels. The Ta/Mo-gated...
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