Thibaut Soulestin | Dominik Aeschbach | Henkel | Teca-Print: How can you replace expensive flexible circuits and print 5G antennas directly onto a smartphone's plastic frame?
00:08:07 - 00:10:30
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Summary of the clip:
How can you replace expensive flexible circuits and print 5G antennas directly onto a smartphone's plastic frame?
This clip details a high-volume manufacturing application: printing 5G antennas directly onto the polycarbonate frame of a smartphone. This additive approach replaces traditional copper flexible printed circuits (FPCs), creating a cheaper, more integrated, and potentially higher-performance solution by eliminating the need for separate polyimide substrates and complex assembly steps. The antenna is printed directly where it needs to be.
The success of this application hinges on the specialized silver ink. It must provide extremely high electrical conductivity for signal integrity while also passing rigorous consumer electronics reliability tests. The printed antenna must withstand thermal shock, humidity, and abrasion, ensuring it performs flawlessly throughout the device's lifetime and connects reliably to the main board.
A key technical challenge is connecting the externally printed antenna to the internal PCB. The solution involves a combination of pad printing a robust contact pad on the inside of the frame and using a silver-filled via ink. This conductive via, dispensed into a small hole in the frame, creates a reliable Z-axis interconnection between the inner and outer surfaces, completing the circuit from the antenna to the electronics.
In this short video, you can learn:
* The process of printing 5G antennas directly onto polycarbonate smartphone frames.
* The critical performance requirements for the conductive ink, including conductivity and reliability.
* An innovative method for creating a Z-axis connection through the frame using a via-fill ink.
📋 **Clip Abstract** Explore a real-world case study of using pad printing to manufacture 5G antennas directly on smartphone frames. This process eliminates the need for separate flexible circuits, requiring highly reliable conductive inks and a clever via-fill technique for interconnection.
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#Printed5GAntennas, #AdditiveElectronics, #ConductiveInk, #ViaFillInk, #PrintedElectronics, #3DElectronics
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00:05:21 - 00:07:15
Beyond the ink, what are the two other critical variables that determine success or failure in 3D printed electronics?
Beyond the ink, what are the two other critical variables that determine success or failure in 3D printed electronics?
The first key component is the cliché plate, which acts as the master image for the circuit. This plate is engraved with the desired pattern, and its quality is paramount. Any mistake, defect, or imperfection in the engraving will be directly transferred to the final printed part, so precision in the cliché is the foundation for a successful print.
The second critical element is the functional ink itself. While the ink formulation is crucial for electrical performance, the pad printing process allows for building up layer thickness. By printing the same pattern multiple times in rapid succession, you can increase the height of the conductive trace, thereby lowering resistance and achieving the target performance for the electronic application.
The third pillar of the process is the silicone pad, the soft, deformable medium that transfers the ink from the cliché to the object. The pad's geometry, hardness (Shore value), and material properties are carefully selected to conform perfectly to the shape of the 3D object. For printed electronics, special anti-static pads that ensure a clean and sharp transfer of the ink are essential for creating well-defined conductive lines.
In this short video, you can learn:
* The critical role of the engraved cliché plate as the master pattern.
* How to build layer thickness and conductivity by printing multiple layers.
* Why the silicone pad's shape and material are crucial for printing on complex 3D objects.
📋 **Clip Abstract** Discover the three key pillars of the pad printing process for electronics: the master cliché plate, the functional ink, and the conformable silicone transfer pad. Understanding how to optimize these three components is essential for successfully printing on complex 3D surfaces.
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#ClichéPlate, #FunctionalInk, #SiliconePad, #PadPrinting, #PrintedElectronics, #3DElectronics
00:10:53 - 00:13:10
Can you really pad print 50-micron conductive lines on a curved 3D object without defects?
Can you really pad print 50-micron conductive lines on a curved 3D object without defects?
Achieving fine-line printing with pad technology requires moving beyond standard cliché plates. Traditional clichés often use a grid or dot pattern within the engraved area to ensure a uniform ink film for large areas. However, this microscopic pattern gets transferred to the print, creating an uneven surface and compromising the integrity and conductivity of very fine electronic traces.
The solution lies in a custom-engineered cliché plate developed through a deep collaboration between ink and machine experts. By strategically removing the grid pattern *only* in the areas where fine lines are required (e.g., 50 microns), while keeping it for larger pads, the cliché can hold and transfer a clean, continuous line of ink without the artifacts caused by the grid.
This optimized cliché-and-ink system enables the printing of extremely fine and highly conductive lines directly onto 3D objects. This capability is a significant advantage over other methods like thermoforming a pre-printed 2D film, as such fine traces would likely crack or deform during the forming process. Pad printing allows for direct, high-resolution patterning on the final, complex 3D shape.
In this short video, you can learn:
* Why standard cliché plates with grid patterns are unsuitable for fine-line electronics.
* The innovative approach of creating custom clichés that remove the grid for fine features.
* How this method enables printing 50-micron lines on 3D objects, a feat difficult for other technologies.
📋 **Clip Abstract** Learn the secret to achieving high-resolution, 50-micron conductive traces on 3D surfaces using pad printing. This breakthrough requires a custom-engineered cliché plate that eliminates traditional grid patterns, enabling defect-free printing of fine lines.
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#PadPrinting, #CustomClichéPlates, #FineLineElectronics, #3DPrintedElectronics, #PrintedElectronics, #AdditiveElectronics