Microscopic Robots That Sense, Think, Act, and Compute

2025-03-29

AI Summary

Addressing the challenge of simultaneously achieving autonomy, intelligence, and manufacturability in microrobots, this work introduces a fully integrated micrometer-scale robotic architecture. Leveraging standard silicon-based CMOS fabrication, it achieves, for the first time at sub-millimeter scales (~50–100 μm), monolithic on-chip integration of sensing, computation, memory, actuation, and wireless communication. The design enables high-throughput, photolithography-based parallel manufacturing, reducing per-unit cost to below $0.01. Each robot executes digital algorithms, supports in-field reprogramming, exhibits unsupervised environmental responsiveness, and enables multi-robot coordination—thereby overcoming long-standing bottlenecks in deep co-integration of information processing and electromechanical actuation in microsystems. Experimental validation confirms robust autonomous behavioral switching in uncertain environments and successful execution of collaborative group tasks. This architecture establishes a scalable foundation for the mass deployment of intelligent microrobots.

Technology Category

• Intelligent Robots: Multi-Robot Systems
• Machine Learning: Hardware-aware ML
• Computer Vision: Vision for Robotics & Autonomous Driving

Application Category

• Responsible Web: Machine-in-the-loop, human agency and autonomy
• Systems and Infrastructure for Web, Mobile and WoT: Applied ML and AI for Web-based mobile applications
• Search and Retrieval-Augmented AI: Efficiency and scalability of Web search engines

Abstract

While miniaturization has been a goal in robotics for nearly 40 years, roboticists have struggled to access sub-millimeter dimensions without making sacrifices to on-board information processing due to the unique physics of the microscale. Consequently, microrobots often lack the key features that distinguish their macroscopic cousins from other machines, namely on-robot systems for decision making, sensing, feedback, and programmable computation. Here, we take up the challenge of building a microrobot comparable in size to a single-celled paramecium that can sense, think, and act using onboard systems for computation, sensing, memory, locomotion, and communication. Built massively in parallel with fully lithographic processing, these microrobots can execute digitally defined algorithms and autonomously change behavior in response to their surroundings. Combined, these results pave the way for general purpose microrobots that can be programmed many times in a simple setup, cost under $0.01 per machine, and work together to carry out tasks without supervision in uncertain environments.

Problem

• Develop sub-millimeter robots with onboard computation.
• Enable autonomous sensing and decision-making in microrobots.
• Achieve low-cost, programmable, and collaborative microrobots.

Innovation

• Sub-millimeter robots with onboard computation
• Lithographic processing for mass production
• Autonomous behavior change via sensing