Carbon Nanotube Network Transistor for a Physical Unclonable Functions-based Security Device

Lee, Yong-Woo; Yoon, Jinsu; Kim, Hyojin; Park, Geon-Hwi; Kim, Dae Hwan; Kim, Dong Myong; Kang, Min-Ho; Choi, Sung-Jin

doi:10.1109/nano46743.2019.8993890

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…During the CNT solution deposition process, CNTs are randomly interconnected with each other to form a network, such that the unique distribution of CNTs within the network is unpredictable and cannot be reproduced identically. A previous study fabricated a PUF device based on solution-processed CNT network TFTs 31 . This demonstrates that the CNT network itself can be the secret key for high-level hardware security using a simple process with high CMOS compatibility and a small footprint area.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a randomly percolated CNT network for an improved analog physical unclonable function

Yang,

Lee,

et al. 2023

Preprint

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As the Internet of Things (IoT) continues to expand, research on an alternative encryption technology, the physically unclonable function (PUF), is increasing. Carbon nanotube (CNT) network-based PUFs have the great advantage of having a very simple process and being compatible with CMOSs, but since the randomness varies greatly depending on the process conditions, it is necessary to investigate various process parameters to have excellent PUF performance. For this purpose, we implemented a random CNT network using simulation and constructed an analog PUF with resistance values as data through numerous iterations. At this time, new evaluation methods were presented to compare the performance of the analog PUF, and the optimal point of PUF performance was identified by comparing the performance according to two process parameters, CNT density and metallic CNT ratio. Our study can serve as a guide for producing an optimized CNT PUF in the future after the CNT solution and processing method are clarified. This will be a PUF with a small footprint area, high CMOS compatibility, and superior security compared to a digital PUF.

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Section: Introductionmentioning

confidence: 99%

Simulation of a randomly percolated CNT network for an improved analog physical unclonable function

Yang,

Lee,

et al. 2023

Preprint

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“…Indeed, for mass-production commercialization studies, the electrical performance of CNT network transistors manufactured on wafers with a size of at least 8 inches should be evaluated. Of course, CNT-based transistors fabricated on 8-inch wafers have been reported previously [19][20][21], but the stability and uniformity issues associated with 8-inch wafer-scale processes have remained challenging.…”

Section: Introductionmentioning

confidence: 99%

Wafer-scale carbon nanotube network transistors

et al. 2020

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Highly purified, preseparated semiconducting carbon nanotubes (CNTs) hold great potential for high-performance CNT network transistors due to their high electrical conductivity, high mechanical strength, and room-temperature processing compatibility. In this paper, we report our recent progress on CNT network transistors integrated on an 8-inch wafer. We observe that the key device performance parameters of CNT network transistors at various locations on an 8-inch wafer are highly uniform and that the device yield is impressive. Therefore, this work validates a promising path toward mass production and will make a significant contribution to the future field of wafer-scale CNT electronics.

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Simulation of a randomly percolated CNT network for an improved analog physical unclonable function

Yang,

Lee,

et al. 2024

Sci Rep

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Carbon nanotube networks (CNTs)-based devices are well suited for the physically unclonable function (PUF) due to the inherent randomness of the CNT network, but CNT networks can vary significantly during manufacturing due to various controllable process conditions, which have a significant impact on PUF performance. Therefore, optimization of process conditions is essential to have a PUF with excellent performance. However, because it is time-consuming and costly to fabricate directly under various conditions, we implement randomly formed CNT network using simulation and confirm the variable correlation of the CNT network optimized for PUF performance. At the same time, by implementing an analog PUF through simulation, we present a 2D patterned PUF that has excellent security and can compensate for error occurrence problems. To evaluate the performance of analog PUF, a new evaluation method different from the existing digital PUF is proposed, and the PUF performance is compared according to two process variables, CNT density and metallic CNT ratio, and the correlation with PUF performance is confirmed. This study can serve as a basis for research to produce optimized CNT PUF by applying simulation according to the needs of the process of forming a CNT network.

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Carbon Nanotube Network Transistor for a Physical Unclonable Functions-based Security Device

Cited by 6 publications

References 10 publications

Simulation of a randomly percolated CNT network for an improved analog physical unclonable function

Simulation of a randomly percolated CNT network for an improved analog physical unclonable function

Wafer-scale carbon nanotube network transistors

Simulation of a randomly percolated CNT network for an improved analog physical unclonable function

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