French manufacturer of radiation-hardened 3D-stacked electronics and STT-MRAM non-volatile memory for space and aviation applications.
3D PLUS SA is a French electronics manufacturer specializing in 3D-stacked microelectronic modules designed to operate reliably in extreme environments — primarily space, aviation, and defense. Their core engineering capability is radiation hardening: designing and packaging electronic components that survive cosmic radiation, which destroys conventional silicon. In the MNEMOSYNE project, which they coordinated, they developed STT-MRAM (Spin-Transfer Torque Magnetic RAM) — a non-volatile memory technology using FDSOI processes — specifically for space and aviation applications, with an explicit goal of reducing Europe's dependence on non-European memory suppliers. They sit at the intersection of advanced semiconductor packaging and mission-critical electronics, making them a strategic industrial partner for European space programs.
Both RADSAGA (2017, radiation and reliability challenges for space/avionics electronics) and MNEMOSYNE (2020, radiation hardening by design for space memory) confirm this as their defining technical capability.
MNEMOSYNE explicitly lists '3D stacking' as a core keyword, consistent with the company's founding identity as a 3D microelectronics packager.
MNEMOSYNE (€1.07M, coordinated) was dedicated entirely to developing magnetic non-volatile RAM with a serial interface for space applications using FDSOI technology.
Both projects target space and avionics environments specifically; RADSAGA covered ground-level and airborne radiation effects alongside space.
'European non dependence' is an explicit keyword in MNEMOSYNE, indicating 3D PLUS positions itself as a strategic European alternative to non-EU suppliers of space-grade memory.
3D PLUS entered H2020 participation in 2017 through RADSAGA, a Marie Skłodowska-Curie training network where they contributed as an industrial partner to a broad consortium focused on radiation and reliability challenges across multiple application domains — space, avionics, and ground systems. By 2020, their focus sharpened considerably: as coordinator of MNEMOSYNE, they moved from broad radiation reliability into a very specific technology bet — STT-MRAM non-volatile memory built on FDSOI processes, targeted at space and aviation. The shift is from training-network participant covering general radiation effects to industrial coordinator driving a specific European memory technology toward flight readiness.
3D PLUS is moving from broad radiation-hardening participation toward coordinating focused, product-oriented memory technology development — suggesting they are building toward a commercial space-grade memory product and are likely to seek future partners in semiconductor fabrication, ESA supply chains, and radiation testing.
3D PLUS has demonstrated both roles: industrial partner in a large multi-partner training network (RADSAGA), and coordinator of a focused research project (MNEMOSYNE). Their 26 unique partners across 10 countries across just 2 projects indicates they work in medium-to-large consortia rather than narrow bilateral arrangements. As a private company leading MNEMOSYNE, they are comfortable taking the consortium leadership role when the technology agenda aligns with their commercial roadmap.
3D PLUS has built connections with 26 distinct consortium partners across 10 countries through just two projects, suggesting strong per-project network density. Their collaborations span European space and semiconductor research institutions, consistent with ESA-adjacent industrial networks.
3D PLUS is one of the few European private companies with both manufacturing capability in 3D-stacked electronics and the technical credibility to coordinate EU-funded research on radiation-hardened memory — a combination rare outside large defense primes. Their explicit commitment to reducing European non-dependence in space-grade memory positions them as a strategic industrial player for ESA, Arianespace, and European defense electronics supply chains. For consortium builders, they bring the rare combination of hardware manufacturing, radiation hardening know-how, and industrial-grade component qualification in a single organization.
