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Bulge-Free and Homogeneous Metal Line Jet Printing with StarJet Technology
Dániel Straubinger1, Peter Koltay2, Roland Zengerle1,3
1Hahn-Schickard, Georges-Koehler-Allee 103, D-79110 Freiburg, Germany.
Micromachines
|June 27, 2024
Summary
This study demonstrates StarJet metal jet-printing for creating precise, bulk metal lines on various substrates without post-processing. This cost-effective technology advances additively manufactured electronics and sensors.
Area of Science:
- Materials Science
- Additive Manufacturing
- Electronics Engineering
Background:
- Jet printing of metal lines is crucial for flexible electronics, sensors, and solar cells.
- Existing methods often require surface activation, heating, or post-processing.
Purpose of the Study:
- To investigate the non-contact printing of bulk solder lines using StarJet technology.
- To explore printing parameters and their effects on diverse substrates.
Main Methods:
- Experimental investigation of molten metal temperature, substrate temperature, standoff distance, and printing velocity.
- Utilized bulk metal instead of inks or pastes for cost-effectiveness and conductivity.
- Tested on polymer foils (PET) and rough 3D-printed substrates (PLA, TPU, PA-GF, PETG).
Main Results:
- Established robust printing parameters for uniform, bulge-free bulk metal lines.
- Successfully extended printing to various 3D-printed materials with high surface roughness.
- Achieved a high aspect ratio (approx. 16:1) wall structure by multi-layer printing.
Conclusions:
- StarJet metal jet-printing offers a cost-effective, versatile method for additively manufactured electronics.
- The technology eliminates the need for post-processing, simplifying fabrication.
- Further advancements in additively manufactured electronic devices are enabled by this technology.
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