NTUA at SPIE Photonics West 2025

From 25-30 January 2025, the SPIE Photonics West 2025, the largest conference and exhibition for the optics and photonics community, took place in San Francisco, California (US). Our coordinator National Technical University of Athens attended and represented Project MatEl.

The conference provided opportunities to connect with researchers and industry and learn about the latest breakthroughs in the fields of, among others, photonics, lasers, and optoelectronics.

In this context, on the 29th of January, Prof. Ioanna Zergioti had the chance to present the joint results of the National Technical University of Athens, PHIX Photonics Assembly and LioniX International on the “Laser induced forward transfer of metals and solder materials for the digital bonding in photonic applications”, achieved within the Project MatEl. In this presentation, it was highlighted how the combination of LIFT and laser soldering technology was utilized to efficiently print solder paste and successfully bond micro-components on photonic chips, for assembly applications. Below you can find the abstract of the presentation:

In this work, we demonstrate the application of laser induced forward transfer (LIFT) of metal nanoparticle inks and pastes for the additive manufacturing micro-electrodes and laser soldering of solder paste onto SiO2/Si substrates, in order to bond micro-components on photonic chips. Preliminary results were promising, in the combination of solder paste LIFT and laser soldering achieving the bonding of a capacitor on silicon substrates from a mechanical point of view.