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Silicon Through holes by Accumulative interplaY of 2 Micron short pulsEs

Objective

At a time when digitalization is omnipresent in our daily lives and silicon-based devices remain a key factor, the demand for high-density interconnections and increasingly compact, reliable electronics is essential for the continued advancement of semiconductor technologies. Through-Silicon Vias (TSV), the vertical interconnects that make true 3D integration possible in CMOS chips, MEMS sensors, and AI hardware play a key role. The STAY2ME project lays the foundation for a radical shift in how silicon structures that drive tomorrow’s technologies can be shaped and connected. Our radically innovative laser-based technology enables non-contact, chemicals-free, high-aspect-ratio micro-drilling within silicon, delivering unprecedented precision without detrimental side-effects in the surrounding material. This will be a game-changer for fabricating TSV. At the core of this innovation is a mJ-energy class laser operating at 2 micrometers in the novel GHz-burst regime, where a rapid train of pulses is delivered in ultrashort bursts. This laser combines the right wavelength with the right pulse dynamics, achieving nonlinear absorption and how energy accumulates in silicon-thus avoiding the laser beam distortion and chaotic energy deposition that plague existing methods. It could outperform the precision, speed and sustainability of Deep Reactive Ion Etching, today’s state-of-the-art for TSVs, and transforms what was once a materials limitation into a design revolution. Understanding and controlling how such a laser interacts with silicon is a breakthrough, opening a fundamentally new regime of laser-based silicon processing which offers unprecedented control over the drilling process. One of the unique strengths of this project lies in its interdisciplinary consortium, bringing together specialists from physics, chemistry, electrical and mechanical engineering, and thus, covering all facets and know-how to successfully carry out the STAY2ME project.

Fields of science (EuroSciVoc)

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Keywords

Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)

Programme(s)

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Topic(s)

Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.

Funding Scheme

Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.

HORIZON-EIC - HORIZON EIC Grants

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Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

(opens in new window) HORIZON-EIC-2025-PATHFINDEROPEN

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Coordinator

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 529 332,50
Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 715 062,50

Participants (6)

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