New technique uses 3D printing to fab three-dimensional chip circuits
Technology can print free-standing metal structures without any support material
Researchers from the National University of Singapore have developed a way to build free-standing, self-healing metallic structures without support materials. This technology, called CHARM3D, uses 3D metal printing and direct ink writing (DIW) to fabricate compact electronics.
CHARM3D allows for the development of vital sign monitoring devices that are completely non-contact. The patient just positions themselves near the sensor, which can detect breathing and other vital signs without ever touching the patient’s skin.
The method uses a special metal called Field’s metal, which has a low melting point and solidifies rapidly. This makes it an excellent material for direct ink writing three-dimensional circuits. CHARM3D uses it to fabricate highly complex free-standing 3D structures like vertical letters, cubic frameworks, and scalable helixes.
The technology also has self-healing properties. If a circuit is broken, the mere application of a heat gun can repair it in seconds. The engineers have already used CHARM3D to fabricate a range of compact electronics, including wearable sensors, wireless communication systems, and electromagnetic metamaterials.
Potential applications include more accurate medical imaging, such as microwave breast cancer imaging to detect tumors earlier. It also holds promise in advanced security applications, such as screening for hidden devices or contraband.
Source: https://www.tomshardware.com/3d-printing/new-technique-uses-3d-printing-to-fab-three-dimensional-circuits