Abstract:
In this work we have proposed and simulated a novel GAA FinFET with a hollow fin that could be used for sensing proteins and other biological molecules that show high val...Show MoreMetadata
Abstract:
In this work we have proposed and simulated a novel GAA FinFET with a hollow fin that could be used for sensing proteins and other biological molecules that show high values of dielectric constant (k) compared to free space. This device may also be used to detect biological as well bio-chemical processes that involve structural changes in the biomolecules that may alter its dielectric properties. This can be used in the detection of various cancers cell line proteins that have dielectric constants in the range of 40 to 80 as solutions in water. The principle of the device is based on the variation of the various device parameters associated with the device such as threshold voltage (Vth), ON-State Drain current (Ids), Voltage gain (gm/gd), switching ratio (Ion/Ioff) and sensitivity in the presence of a protein due to its dielectric properties. The variation of the dielectric constant is done from 1 to 80 in steps of 20. It is seen from the results of the simulation that the device shows a deviation in the threshold voltage (Vth) of 0.371 V when k=80. The device also shows an average value of 4 x 10-3V for average Vth shift (ΔVth/Δk). The ON-State Drain current of the device also increases from 2.85 x 10-7A to 1.6 x 10-5A at k=80. The switching ratio of the device also decreases from 1.95 x 104 at k=1 to 0.71 x 103 at k=80 as the value of k increases. The sensitivity of the device calculated as “S=Ion(k>1)/Ion(k=1)” also increases from 6.3 at k=20 to56 at k=80. The average sensitivity defined as (S/k), increases from 0.315 at k=20 to 0.7 at k=80.
Published in: 2020 9th International Conference on Modern Circuits and Systems Technologies (MOCAST)
Date of Conference: 07-09 September 2020
Date Added to IEEE Xplore: 18 September 2020
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