07-06-2018 дата публикации
Номер: US20180156749A1
Принадлежит:
Embodiments of the invention determine intrinsic parameters of stacked nanowires/nanosheets GAA MOSFETs comprising Nnanowires and/or nanosheets, each nanowire/nanosheet being surrounded in an oxide layer, the oxide layers being embedded in a common gate, wherein the method comprises the following steps: 1. A computer implemented method for determining at least one intrinsic parameter of a stacked nanowires/nanosheets gate-all-around (GAA) metal oxide semiconductor field effect transistor (MOSFET) comprising Nnanowires and/or nanosheets , each nanowire/nanosheet being surrounded in an oxide layer , the oxide layers being embedded in a common gate , wherein the method comprises the following steps: [{'sub': 'w', 'the number of stacked nanowires/nanosheets N,'}, {'sub': w,i', 'w, 'the width W, of the nanowire/nanosheet number i, i being an integer from 1 to N,'}, {'sub': w,i', 'w, 'the thickness of the nanowire/nanosheet H, number i, i being an integer from 1 to N,'}, {'sub': w,i', 'w', 'w,i, 'the corner radius Rof the nanowire/nanosheet number i, i being an integer from 1 to N, R;'}], 'measuring by at least one imaging method the following geometrical parameters of the MOSFET{'sub': T', 'T', 'B, 'calculating, using a physical processor and the measured geometrical parameters, a surface potential x normalized by a thermal voltage ϕgiven by ϕ=kT/q;'}measuring electrically the total gate capacitance for a plurality of gate voltages;determining, using the measured total gate capacitance and the calculated normalized surface potential, the at least one intrinsic parameter of the stacked nanowires/nanosheets MOSFET.3. A computer implemented method according to claim 2 , further comprising a step of determining claim 2 , using a physical processor claim 2 , constants Band Δaccording to geometry parameters of the stacked nanowires/nanosheets GAA MOSFET and process parameters claim 2 , wherein the step of determining constants Band Δcomprises a step of:{'sub': 'effnw,i', ' ...
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