Hybrid architecture based on two-dimensional memristor crossbar array and CMOS integrated circuit for edge computing – SemiEngineering

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Design of a hybrid edge computing system utilizing emerging 2D materials along with existing CMOS technology.

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Abstract
“The fabrication of integrated circuits (ICs) employing two-dimensional (2D) materials is a major goal of semiconductor industry for the next decade, as it may allow the extension of the Moore’s law, aids in in-memory computing and enables the fabrication of advanced devices beyond conventional complementary metal-oxide-semiconductor (CMOS) technology. However, most circuital demonstrations so far utilizing 2D materials employ methods such as mechanical exfoliation that are not up-scalable for wafer-level fabrication, and their application could achieve only simple functionalities such as logic gates. Here, we present the fabrication of a crossbar array of memristors using multilayer hexagonal boron nitride (h-BN) as dielectric, that exhibit analog bipolar resistive switching in >96% of devices, which is ideal for the implementation of multi-state memory element in most of the neural networks, edge computing and machine learning applications. Instead of only using this memristive crossbar array to solve a simple logical problem, here we go a step beyond and present the combination of this h-BN crossbar array with CMOS circuitry to implement extreme learning machine (ELM) algorithm. The CMOS circuit is used to design the encoder unit, and a h-BN crossbar array of 2D hexagonal boron nitride (h-BN) based memristors is used to implement the decoder functionality. The proposed hybrid architecture is demonstrated for complex audio, image, and other non-linear classification tasks on real-time datasets.”

Find the open access technical paper here. Published Jan 2022.

Kumar, P., Zhu, K., Gao, X. et al. Hybrid architecture based on two-dimensional memristor crossbar array and CMOS integrated circuit for edge computing. npj 2D Mater Appl 6, 8 (2022). https://doi.org/10.1038/s41699-021-00284-3

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