High-performance silicon-metal laser welding resisting extreme conditions
Abstract
Reliable material joining is essential for countless industrial applications. While femtosecond laser welding provides a route beyond conventional bonding methods, demonstrations of silicon-metal joints are rare due to nonlinear propagation effects and have so far been limited to shear joining strengths of a few MPa. Here, we demonstrate high-strength silicon-Kovar laser welding using sub-nanosecond pulses. By optimizing the focal position, the welding pattern, the laser polarization, and the metal roughness, remarkable shear joining strengths up to 15.8 MPa are achieved. The silicon-metal joints withstand temperatures of up to 500 °C and are hermetically sealed. Together with the remarkable strength values, the resistance to harsh environments underpins the applicability of silicon-metal welding in various fields including aerospace, nuclear science, and metallurgy.
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BibTeX
@misc{yin2026highperformance,
title = {{High-performance silicon-metal laser welding resisting extreme conditions}},
author = {Jiawei Yin and Markus Blothe and Hagen P. Kohl and Christina Schütze and Stefan Nolte and Maxime Chambonneau},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.28423},
eprint = {2608.28423},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.28423},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - High-performance silicon-metal laser welding resisting extreme conditions
AU - Jiawei Yin
AU - Markus Blothe
AU - Hagen P. Kohl
AU - Christina Schütze
AU - Stefan Nolte
AU - Maxime Chambonneau
PY - 2026
DA - 2026/08/28
PB - arXiv
DO - 10.48550/arxiv.2608.28423
UR - https://arxiv.org/abs/2608.28423
AB - Reliable material joining is essential for countless industrial applications. While femtosecond laser welding provides a route beyond conventional bonding methods, demonstrations of silicon-metal joints are rare due to nonlinear propagation effects and have so far been limited to shear joining strengths of a few MPa. Here, we demonstrate high-strength silicon-Kovar laser welding using sub-nanosecond pulses. By optimizing the focal position, the welding pattern, the laser polarization, and the metal roughness, remarkable shear joining strengths up to 15.8 MPa are achieved. The silicon-metal joints withstand temperatures of up to 500 °C and are hermetically sealed. Together with the remarkable strength values, the resistance to harsh environments underpins the applicability of silicon-metal welding in various fields including aerospace, nuclear science, and metallurgy.
ER -