研究目的
To evaluate the suitability of a novel aerosol-based printing system for generating microstrip lines in high-frequency applications, focusing on geometric and electrical characterization.
研究成果
The Nanojet system is capable of producing narrow circuit tracks with high contour accuracy and is suitable for MID applications. Multiple printing passes linearly increase line height without significantly affecting width. Conductivity achieved is about 25% of bulk silver, with good RF performance up to 67 GHz. Future work should address overspray reduction, reproducibility, and application to other RF components.
研究不足
The process exhibits overspray and inconsistencies in material output, potentially due to ink ageing or process instability. Achieved conductivity is lower than datasheet values, possibly due to ink dilution and thermal expansion issues. The study is limited to microstrip lines and may not generalize to other RF structures.
1：Experimental Design and Method Selection:
The study uses an aerosol-based digital printing process (Nanojet) to generate conductive microstrip lines on substrates. The methodology involves printing with varying parameters, sintering the samples, and characterizing them geometrically and electrically.
2：Sample Selection and Data Sources:
Samples are printed on Megtron-6 substrates using UTDots Ag40X nano-particle ink diluted with xylenes and terpineol.
3：List of Experimental Equipment and Materials:
Equipment includes a Nanojet printing unit, Neotech AMT 15XG3 system, laser-scanning microscope (Keyence), vector network analyzer (VNA), oven for sintering, and CAD/CAM software (Motion 3D). Materials include the ink and substrate.
4：Experimental Procedures and Operational Workflow:
Printing is done with controlled feed rates (0.8 to 5 mm/s) and repetitions (1 to 4 times). After printing, samples are sintered at 200°C for 60 minutes. Geometric analysis measures width and height with a laser microscope; electrical analysis uses VNA with multiline-deembedding to measure attenuation and phase velocity.
5：8 to 5 mm/s) and repetitions (1 to 4 times). After printing, samples are sintered at 200°C for 60 minutes. Geometric analysis measures width and height with a laser microscope; electrical analysis uses VNA with multiline-deembedding to measure attenuation and phase velocity. Data Analysis Methods:
5. Data Analysis Methods: Data is analyzed using statistical methods for mean values and standard deviations, and RF properties are derived from VNA measurements using transmission line theory.
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