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This paper, for the first time, shows that the work-function variation (WFV) in emerging metal-gate devices results in significant fluctuation in the gate-oxide electric field, and hence fluctuation in bias temperature instability (BTI) characteristics (both NBTI and PBTI). We modify the existing NBTI and PBTI models in order to accurately characterize the BTI characteristics of the metal-gate devices...
SRAM cells with Vth-controllable independent double-gate (IDG) FinFETs have been successfully fabricated. The performance of the fabricated SRAM cell with various circuit topologies has been investigated comprehensively. Both a reduction of leakage current and an enhancement of read and write noise margins have been successfully demonstrated by introducing the IDG FinFETs into the SRAM cells.
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...
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