Conductive metal coating on PEEK polymer substrate created by low-pressure cold spray (LPCS) metallization process for structural electronics applications
We have developed a novel powder system and a low-pressure cold spray (LPCS) process enabling the direct deposition of electrically conductive metallic coatings onto engineering polymers, including high-performance materials such as PEEK.
The process forms a dense, adherent and electrically functional metal layer directly on polymer substrates without the use of electroplating, conductive adhesives, or intermediate bonding layers. This enables a new class of structurally integrated conductive materials, where electrical functionality is embedded directly into load-bearing plastic components.
Initial experimental validation has demonstrated:
- Stable electrical conductivity suitable for power transmission applications (up to 16 A in preliminary tests)
- Strong adhesion of metallic layers to polymer substrates under mechanical loading
- Resistance to delamination under static mechanical stress, including load tests up to 10 kg
- Direct solderability of the deposited metallic layer, enabling conventional electronic interconnection
The process operates within a controlled LPCS parameter window, where gas pressure, temperature, stand-off distance, and engineered powder composition are critical to achieving repeatable coating formation and stable performance.
This approach differs from conventional polymer metallization techniques by enabling functional, load-resistant metallic layers rather than purely decorative or low-performance conductive coatings.
Application potential includes:
- structural electronics and conductive polymer systems
- replacement of internal wiring harnesses with embedded conductive pathways
- lightweight electronic integration in mechanical housings
- RF structures and antenna systems on polymer substrates
- robotics, UAV systems, and advanced industrial electronics
The technology is currently under continued development, including detailed characterization of adhesion mechanisms, microstructure, electrical performance, thermal stability, and long-term reliability. Independent validation and industrial collaboration are actively being pursued.
This development represents a step toward fully functional electronic integration in engineering polymers, enabling new design architectures where mechanical and electrical functions are combined within a single material system.
Electrically conductive metallic layer directly applied to high-performance PEEK polymer substrate.
Direct soldering of copper wire onto LPCS-deposited conductive polymer coating.
Conductive coating maintains integrity under static mechanical load testing.