Hardware security
Semiconductors are used everywhere, from consumer electronics to industrial products and critical infrastructure. They are essential for a comfortable and convenient society. However, the proliferation of counterfeit semiconductor products and information leaks from IoT devices has been of great concern in recent years. For secure and safe IoT/CPS (Cyber-Physical Systems), it is crucial that semiconductor products are genuine and that data security is guaranteed. To realize secure and safe IoT/CPS, we are conducting research and development on Physically Unclonable Functions (PUFs). PUFs utilize the inherent “variability” in semiconductors to authenticate individual IC chips and generate cryptographic keys for data protection. This technology effectively prevents device replication and counterfeiting, and it can be implemented at a low cost.
Emphasized optimal design of sensors and circuits
Analog mixed-signal integrated circuits for MEMS sensors include various essential components such as low-noise amplifiers, AD converters, and digital circuits. In this study, after modeling sensor device as an equivalent circuit, its appropriate circuit architecture will be created to satisfy given specifications and/or target cost. We also adopt digitally-assisted techniques to enhance its performance and functionalities. This sensor circuit co-optimization scheme can be applicable to other devices such as actuators and energy harvesting as well.
Edge AI chip design
AI (deep-learning) tasks are usually processed in data centers because of the huge amount of computation. However, it is expected that AI tasks are processed at user side, due to large power and latency in communication between users and data centers and security concerns. In user side (edge) devices, the power allowed for AI tasks is often limited. Therefore, circuits dedicated to process AI tasks efficiently, called “edge AI chips,” are required. We are conducting research and development of ultra-efficient AI chips.
Digital circuit by printing device
Flexible printing devices have the characteristics of being inexpensive due to printing technology, flexible enough to be mounted on curved surfaces, and capable of mounting large-area sensors and circuit elements, and are expected to have the potential to greatly change the degree of freedom in the form of computers. I am. In order to realize a device in which many circuit elements are printed on a single flexible film, we are aiming to realize a digital circuit using a printed device.
