Printed Planar Microcoils: new generation of miniaturized devices
Miniaturization continues to drive innovation across microelectronics, robotics, wearables, and advanced sensing technologies. As devices become smaller and more integrated, traditional manufacturing approaches often become a limiting factor.
Micro-coils are a good example.
Conventional micro-coil designs frequently require external jumpers and multiple assembly steps to create a complete electrical path. These additional structures increase complexity, consume valuable space, and limit how compact a final device can become.
Rethinking Microcoil Design
Using XTPL’s Ultra-Precise Dispensing technology, a planar microcoil was fabricated with a fully integrated internal return path.
Instead of relying on external connections, the return trace was embedded directly within the printed structure and separated by a micro-dielectric bridge. The result is a completely flat and monolithic architecture that eliminates the need for bulky jumpers.
This approach simplifies the design while enabling a significantly higher level of integration.
Key Technical Results
The printed microcoil demonstrates several important capabilities:
Integrated Return Path
A buried conductive trace was successfully incorporated into the structure, creating a complete electrical loop within a single compact design.
Ultra-Fine Conductive Structures
The coil was printed using 50 μm silver traces deposited with high precision and without shorts or line interruptions.
Efficient Operation
The device achieved a high force-to-power ratio while consuming only 0.52 W at 25 V, demonstrating the potential for efficient actuation in compact systems.
Why It Matters
As manufacturers continue to push device miniaturization, the ability to create functional magnetic components with fewer assembly steps becomes increasingly valuable.
Additive manufacturing approaches such as Ultra-Precise Dispensing make it possible to fabricate highly customized electromagnetic structures while maintaining precise geometry and reducing manufacturing complexity.
Potential Applications
Micro-Robotics and Actuation
Miniature coils can act as the driving force behind micro-actuators, micro-grippers, and next-generation surgical robotics.
Consumer Electronics and Wearables
Ultra-thin haptic feedback systems can be integrated into smart rings, smartwatches, VR gloves, and other wearable devices.
Optoelectronics
Compact magnetic actuators can support autofocus systems, optical alignment mechanisms, and advanced imaging devices.
Aerospace and Defense
Lightweight and highly integrated magnetic components may support space systems, micro-thrusters, and compact sensing platforms.
The Future of Printed Electromagnetic Structures
The presented microcoil illustrates how additive manufacturing can unlock new design possibilities for miniature electronic and electromechanical systems.
By combining ultra-fine conductive structures with three-dimensional functional integration, engineers can create components that are smaller, lighter, and easier to manufacture than traditional alternatives.