Biodegradable heat-resistant flame-retardant circuit boards

A biodegradable printed circuit board is a functional electronics substrate designed to replace conventional FR-4 (glass–epoxy) boards with bio-based, degradable or compostable materials, while still supporting copper traces, component assembly, and reliable electrical performance. It matters because today’s PCBs are a major contributor to e-waste: they are difficult to recycle, contain persistent polymers, and often require energy-intensive separation processes. A biodegradable PCB platform can reduce end-of-life burden and enable simpler recovery pathways (for example, material separation and benign degradation of the substrate).

How it works: we have synthesized a bio-based resin (patented) and engineered a polymer composite that meets key PCB requirements: dimensional stability, heat resistance during assembly, flame retardancy, moisture resistance, mechanical integrity, and dielectric performance.

Proof to date: we have established a lab-scale workflow, also designed and processed bio-based polymer/composite substrates and screened candidates using materials characterization and performance testing relevant to PCB service conditions. The project is progressing through iterative formulation–processing–testing loops to converge on substrates with stable properties and manufacturability.

Next steps: finalize substrate formulations and laminate processing windows; validate thermal cycling, solder/reflow survivability, moisture uptake, and dielectric behavior; fabricate demonstrator boards; and align qualification with relevant industry expectations (IPC-style performance metrics) prior to pilot-scale manufacturing and partner evaluation.