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We introduce an innovative dual-depth shallow trench isolation (dual STI) scheme for Ultra Thin Body and BOX (UTBB) FDSOI architecture. Since in the dual STI configuration wells are isolated from one another by the deepest trenches, this architecture enables a full use of the back bias while staying compatible with both standard bulk design and conventional SOI substrates. We demonstrate in 20nm ground...
Planar fully depleted (FD) devices with thin Buried Oxide (BOX) offer the unique ability to incorporate effective back biasing which is a key enabler to build a versatile multi-Vt technology. From a dynamic standpoint, forward back bias lowers Vt and thus boost device performance, whereas reverse back bias increases Vt and thus decreases leakage [1]. From a static point of view the back gate allows...
FinFET devices achieving N/P Ion values of 1250/950 uA/um at 100nA/um at 1V, 1300/1000 uA/um with self-heating correction, are demonstrated, using a dual work function gate-first process flow at 100 nm gate pitch and 40 nm fin pitch. Ring-oscillator (RO, FO=3) functionality has been demonstrated, showing excellent Vdd scalability. We have also demonstrated logic scan chain functionality and yield...
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...
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