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GRENOBLE, France - Feb. CEA-Leti scientists have opened a pathway to large-scale integration of Si-spin qubits using existing flip-chip processes with die-to-wafer 3D-interconnect technologies developed in-house. In a paper presented during the 2020 Electronics System-Integration Technology Conference (ESTC), the team reported preliminary electrical characterizations at cryogenic temperatures of chip assemblies made with 3D interconnects such as SnAg microbumps and direct Cu bonded pads from Cu/SiO 2 hybrid bonding process.

Gallium Nitride Seen as Highly Efficient Replacement for Silicon in Wide Range of Consumer and Industrial Uses GRENOBLE , France - Dec. Two complementary research papers from CEA-Leti confirmed that the institute's approach to gallium-nitride (GaN) technologies is on track overcome challenges in the architecture and performance of advanced GaN devices embedding a MOS gate, and targeting the fast-growing global market for power-conversion systems.

The validation and application of theories in physics require the measurement of universal values known as fundamental constants. A team of French researchers 1 has just conducted the most accurate measurement to date of the fine-structure constant, which characterizes the strength of interaction between light and charged elementary particles, such as electrons.

Publication by Laboratoire de physique in Physical Review X on June 22, 2020. Abstract Active matter, composed of self-propelled entities, forms a wide class of out-of-equilibrium systems that display striking collective behaviors, among which, the so-called active turbulence where spatially and time-disordered flow patterns spontaneously arise in a variety of active systems.

Astrophysicists consider that around 40% of the ordinary matter that makes up stars, planets and galaxies remains undetected, concealed in the form of a hot gas in the complexe cosmic web. Today, scientists at the Institut d'Astrophysique Spatiale (CNRS/Université Paris-Saclay) may have detected, for the first time, this hidden matter through an innovative statistical analysis of 20-year-old data.

Magnets are to be found everywhere in our daily lives, whether in satellites, telephones or on fridge doors. However, they are made up of heavy inorganic materials whose component elements are, in some cases, of limited availability. Now, researchers from the CNRS, the University of Bordeaux and the ESRF (European Synchrotron Radiation Facility in Grenoble) 1 have developed a new lightweight molecule-based magnet, produced at low temperatures, and exhibiting unprecedented magnetic properties.

With Ultimate Goal of Improving Virus Knowledge, Team Now Will Use its Optomechanical System to Design a Prototype for Airborne Virus Analysis GRENOBLE, France - Oct. Targeting analysis of biological particles with large aspect ratios, such as viruses or fibrils, CEA scientists have demonstrated a breakthrough in single-particle mass spectrometry (MS) that could fast track the detection of viral particles in hospitals, offices, airplanes and other public places.

The gravitational wave 1 detectors LIGO and Virgo have just chalked up their biggest catch yet, a black hole 142 times the mass of the Sun, resulting from the merger of two black holes of 85 and 66 solar masses.  The remnant black hole is the most massive ever observed with gravitational waves, and it could give us some clues about the formation of the supermassive black holes that sit at the centres of some galaxies.

The Earth is the only planet known to have liquid water on its surface, a fundamental characteristic when it comes to explaining the emergence of life.

Scientists from the Coordination Chemistry Laboratory and Laboratory for Analysis and Architecture of Systems, both of the CNRS, recently developed molecular films that can measure the operating temperature of electronic components on a nanometric scale. These patented temperature-sensitive molecules have the distinctive quality of being extremely stable, even after millions of uses.

VLSI 2020 Paper Details First Proof of Integration of FDSOI CMOS Devices Processed at 500°C, for Further 3D Monolithic Integration GRENOBLE, France - June 22, 2020 - In an FDSOI CMOS processing breakthrough, CEA-Leti scientists have pushed fabrication thermal-process boundaries down to 500°C for CMOS integration, while showing strong performance gains especially in P-type metal-oxide-semiconductor (PMOS) logic devices.

Virtual Presentation During VLSI 2020 Details Transistors' Performance And Power-Use Advantages Versus FinFET Devices -GRENOBLE, France - June 15, 2020 - CEA-Leti has demonstrated fabrication of a new gate-all-around (GAA) nanosheet device as an alternative to FinFET technology targeting high-performance (HPC) applications such as smartphones, laptops, and mobile systems with data collection and processing involving low-power and high-speed operation.

In conventional ultrasounds, variations in soft tissue structure distort ultrasound wavefronts. They blur the image and can hence prove detrimental to medical diagnosis. Researchers at the Institut Langevin (CNRS/ESPCI Paris-PSL) 1 have developed a new non-invasive ultrasound method that avoids such aberrations.

We live in a world of matter - because matter overtook antimatter , though they were both created in equal amounts by the Big Bang when our universe began. As featured on the cover of Nature on 16 April 2020, neutrinos and the associated antimatter particles, antineutrinos, are reported to have a high likelihood of differing behaviour that offers a promising path to explaining the asymmetry between matter and antimatter.

Contrary to popular belief, Neanderthals were no less technologically advanced than Homo sapiens . An international team, including researchers from the CNRS, have discovered the first evidence of cord making, dating back more than 40,000 years 1 , on aflint fragment from the prehistoric site of Abri du Maras in the south of France 2 .

A palette of colours on a silver plate: that is what the world's first colour photograph looks like. It was taken by French physicist Edmond Becquerel in 1848. His process was empirical, never explained, and quickly abandoned. A team at the Centre de Recherche sur la Conservation (CNRS/Muséum National d'Histoire Naturelle/Ministère de la Culture) has now shone a light on this, in collaboration with the SOLEIL synchrotron and the Laboratoire de Physique des Solides (CNRS/Université Paris-Saclay) .

Presentation at ISSCC 2020 Shows Role FD-SOI Can Play in Embedding Qubit Arrays with Classic Electronics to Build Large-Scale Quantum Silicon Processors SAN FRANCISCO - Feb. Leti, an institute of CEA, and CEA-IRIG, a fundamental research institute, have created the world's first quantum integrated circuit that demonstrates the possibility of integrating conventional electronic devices and elements with quantum dots on a CMOS chip.

Publication by Laboratoire de Physique in Physical Review Letters on December 23, 2019. Pattern formation, observed experimentally in a radio-frequency plasma in annular geometry, and characterized by azimuthal symmetry breaking of the plasma parameters, is reported. The azimuthal modulation increases with increasing pressure in the range 1-300 Pa.

Gold nanoparticles, which are supposed to be stable in biological environments, can be degraded inside cells. This research conducted by teams from the CNRS, l'Université de Paris, Sorbonne Université, and l'Université de Strasbourg will be published in PNAS on December 16 2019, and reveals the ability of cells to metabolize gold, which is nevertheless not essential for their functioning.

'Results Hold promise for Fast, Accurate Single-Shot Readout 'Of Foundry-Compatible Si MOS Spin Qubits' 'SAN FRANCISCO ' Dec. 11, 2019 ' Leti, a technology research institute of CEA Tech, and its research partners have demonstrated a potentially scalable readout technique that could be fast enough for high-fidelity measurements in large arrays of quantum dots.