AM and Conductive Polymers: Next-Gen Aerospace Electronics

Multi-material 3D printing of PEEK and PEKK enables the consolidation of structural aerospace parts with embedded sensors and high-frequency antennas.

Additive manufacturing (AM), widely known as 3D printing, is transforming how electronics are fabricated and designed for aerospace systems.

Engineers and researchers can leverage design and integration freedoms not typically available in traditional circuitry.  Instead of fabricating circuits separately on rigid boards, installing them into components and assemblies, there is another option for the fabrication and manufacturing of electronics and circuitry.

You can also read: Additive Manufacturing of Conductive Electronics.

Designers and manufacturers can leverage electrical functionality directly into or onto polymer components by additive manufacturing.

Additive Manufacturing Circuitry

AM builds parts layer by layer from digital models. In electronics, this enables embedded antennas, sensors, and electromagnetic control features within plastics. By leveraging the layer by layer fabrication, engineers can tailor geometry, material placement, and function simultaneously.

Plastics play a pivotal role as they offer low density, design freedom, and compatibility with multi-material printing. Unlike traditional metal circuitry which requires soldering, design flexibility and components consolidation are leveraged.

Extrusion-based approaches, like fused deposition modeling (FDM), fused filament fabrication (FFF), and direct ink writing (DIW), deposit thermoplastics or functional inks through a nozzle. These systems can readily combine structural polymers with conductive tracks in a single build.

Laser-assisted technologies such as stereolithography (SLA) and digital light processing (DLP) cure photopolymers with specific wavelengths of light. These methods deliver high resolution and smooth surfaces, which benefit fine conductive features and radio frequency structures.

Together, these AM methods enable polymer circuitry that can reduce assembly steps, wiring complexity, and overall system mass.

Transforming Polymers into Electronics

Extrusion-Based AM Materials 

In extrusion systems, engineers can select high-performance polymer backbones that balance mechanical strength, thermal stability, and chemical resistance. These polymers may be modified for electrical functionality while still serving as structural materials. The leaders for electronics printing are PEEK (polyether ether ketone) and PEKK (polyether ketone ketone). Both withstand high temperatures, aggressive chemicals, and mechanical loads typical of aerospace environments. When blended with conductive phases, they support static dissipation or electromagnetic interference (EMI) control without sacrificing structural integrity.

Engineers also can also use intrinsically conductive polymer systems, where the polymer backbone itself transports charge. These differ from plastics filled with conductive components. PEDOT:PSS (poly(3,4-ethylenedioxythiophene): polystyrene sulfonate) is a common, intrinsically conductive polymer. PEDOTs conjugated backbone enables electron transfer, while PSS improves solubility and printability. Together this thermoplastic mixture supports flexible sensors, and low-power circuits, particularly where mechanical compliance matters.

Many practical materials are polymer composites with conductive fillers. For example, polyetherimide (PEI) serves as a high-temperature, flame-resistant matrix for carbon-based fillers, forming conductive networks for EMI shielding.

Laser-Assisted AM Materials

SLA and DLP processes increasingly use photoreactive polymer–metal resin systems to form conductive features after printing. Two main approaches dominate:

• Resins containing metal catalysts (such as palladium nanoparticles) that activate electroless plating on selected surfaces.
• Resins loaded with metal ions (such as nickel, silver, or copper) that can be chemically reduced after printing to create continuous metallic films within the polymer matrix.

These strategies combine polymer design freedom with metal-like conductivity where needed. Generally, commercial off the shelf acrylate-based resins are reformulated by addition of conductive components to meet compatibility of the resin and conductive species. Though, research groups at Arizona State University and  Central University of Technology, Bloemfontein, South Africa are investigating more intricate multi-material resin systems to enhance printable electronics and fabrication techniques.

Aerospace Electronics Use Cases

Aerospace programs already explore AM electronics for advanced radio frequency and sensing systems. Companies such as Nano Dimension, in collaboration with defense and aerospace partners like Hensoldt, demonstrate additively manufactured radio frequency structures and antennas for compact platforms.

AM enables custom, hard-to-machine geometries that reduce size, weight, and power. Engineers and researchers can embed conductors inside load-bearing structures or print circuitry on non-planar, conformal surfaces such as curved housings and aerodynamic skins.

These capabilities particularly benefit high-frequency communication systems, where antenna shape, integration, and weight directly affect performance.

The Path Forward

Smaller electronic platforms like unmanned aerial vehicle payloads and distributed sensors will likely adopt these technologies first. Their size, weight and power constraints and rapid development cycles take advantage of AMs rapid fabrication.

The long-term vision goes further with fully assembled structural components that also serve as electronic systems. By merging structure and circuitry, engineers can reduce part counts, eliminate wiring harnesses, and enhance reliability using polymer-based electronics. This will while unlock new performance advantages for next-generation aerospace platforms.