High-concentration gold nanopaste enables 5 μm linewidth conductive structures for advanced sensor manufacturing
The challenge: sensor miniaturization demands new manufacturing approaches
As sensors become smaller, smarter, and more integrated into modern electronic systems, conventional manufacturing methods face increasing limitations. Advanced sensing devices require conductive structures with micron-scale dimensions while maintaining excellent electrical performance and design flexibility.
Meeting these requirements is particularly challenging when manufacturing complex geometries on both rigid and flexible substrates. This is why additive, maskless fabrication technologies are attracting growing attention from researchers and industry alike.
Combining advanced materials with Ultra-Precise Dispensing
In our latest scientific publication, “High-Concentration Gold Nanoparticle Pastes for Advanced Deposition-Based Sensor Manufacturing,” XTPL demonstrates how the combination of a specially developed high-concentration gold nanopaste (Au90) and Ultra-Precise Dispensing technology enables the fabrication of highly conductive microstructures for advanced sensor applications.
Unlike conventional deposition methods, Ultra-Precise Dispensing delivers material exactly where it is needed, enabling precise, maskless manufacturing while minimising material waste.
Key results
The study demonstrates several significant achievements:
- Conductive gold structures printed with linewidths down to 5 μm
- Successful deposition on both rigid and flexible substrates
- High-concentration gold nanopaste containing over 90 wt.% gold nanoparticles
- Fabrication of complex fractal geometries that support sensor miniaturisation and high-density integration
- Development of a proof-of-concept temperature sensor with a continuous line length above 39 cm and a linewidth of 7 μm
The combination of advanced material engineering and ultra-precise deposition provides exceptional control over both geometry and conductivity, opening new possibilities for next-generation sensor design.
Why does it matter?
The demand for highly miniaturized sensors continues to grow across numerous industries, including:
- wearable electronics
- medical diagnostics
- environmental monitoring
- industrial sensing
- flexible electronics
As device complexity increases, manufacturers require fabrication technologies capable of producing intricate conductive structures without relying on conventional lithography for every application.
Ultra-Precise Dispensing offers a flexible additive approach that enables localized material deposition with micron-scale precision while supporting rapid prototyping and advanced manufacturing.
From scientific research to future applications
This publication highlights the value of combining innovative functional materials with high-resolution additive manufacturing technologies. The demonstrated capability to fabricate complex conductive gold structures may support the development of future sensor platforms where miniaturisation, conductivity, and design freedom are critical.
Rather than simply presenting another scientific result, this work illustrates how advances in materials science and deposition technology can expand the possibilities of next-generation electronics manufacturing.
Discover the science behind the results → https://www.mdpi.com/1424-8220/26/11/3507