New technique uses 3D printing to fab three-dimensional chip circuits

Application of the CHARM3D technique to design and fabricate a 3D circuit for a wearable battery-free temperature sensor system, as shown here being worn on a human hand. This demonstrates the great potential of the innovative CHARM3D technique in enabling a wide range of applications in healthcare.

The use of 3D circuitry is key in continuing to miniaturize electronics, but it’s been subject to serious drawbacks. The requirement for support materials and external pressure limits how small manufacturers can go, but one research team might have an answer. The engineers have developed a way to build free-standing, self-healing metallic structures without those needs.

Led by Associate Professor Benjamin Tee, the research team from the National University of Singapore (NUS) recently published its findings. Calling its technology CHARM3D, the team demonstrated how it can use 3D metal printing technology to fabricate a wide range of compact electronics, including wearable sensors, wireless communication systems, and electromagnetic metamaterials.