NTUA at SPIE Photonics Europe 2024

From 7 to 11 April 2024, Prof. Ioanna Zergioti, from the National Technical University of Athens, participated in the SPIE Photonics Europe 2024, which took place in San Francisco, California (USA)

The conference was a cross-disciplinary event that highlighted compelling optics and photonics technologies: digital optics, optical imaging, sensing, metrology photonic glasses, and biophotonics are only a few of the areas that this event covered.

On the 9th of April, Prof. Ioanna Zergioti had the chance to present, the joint results of NTUA and Lionix on the “Laser Induced Forward Transfer of metallic interconnections for photonic applications”, achieved within MatEl. In this presentation, it was highlighted how the LIFT technology was utilized to efficiently print metallic patterns and solder materials on PIC chips, exploring various donor substrates and optimizing process parameters for quality transfer, enabling reproducible printing of electrodes for photodetectors and solder paste deposition for assembly applications.

Below you can find the abstract of the presentation:

Among different technologies dealing with additive manufacturing (AM), Laser Induced Forward Transfer (LIFT) is a sustainable and precise manufacturing technology, that shows high potential for industrial application. Here, we propose the use of LIFT to efficiently print metallic patterns and solder materials on PIC chips. This study explores two donor substrates for gold deposition: evaporated gold layers on glass and gold nanoparticle inks, and one donor substrate for solder paste deposition. Parameters like layer thickness, laser scanning speed, donor-receiver gap distance, laser fluence and pulse shape are optimized for quality transfer. Optimization of the LIFT process parameters will enable the reproducible and controllable printing of electrodes for creating an all-printed graphene-based photodetector and the solder paste deposition for assembly applications.

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