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Until recently, it was widely considered that the atomic force microscope (AFM) had hit a ceiling in terms of resolution. Researchers from Leti, CNRS, and Vmicro changed that with a new type of resonator. The conventional vibrating-cantilever-style probe, which tops out at around 1 MHz, has been replaced by a micrometric optically-excited silicon ring that […] >>

Some IC designers prefer to distribute their circuits’ functions across several physical bricks interconnected by a passive interposer. The approach is not new, but now the interposer is. Leti recently added logic (such as clock, I/O, voltage conversion, and other functions), making the interposer active. The institute designed, fabricated, assembled, and tested one with advanced […] >>

In research funded by the French National Research Agency (ANR), a team at Irig electrochemically functionalized silicon micropores. The very sensitive biosensors created in this way are suitable for use analyzing living cells. Their process, inspired by bipolar electrochemistry, involved placing two electrodes on either side of the pore. This technique usually requires voltages that […] >>

Leti presented an integrated vibration-energy harvesting circuit at ISSCC in San Francisco in February. The circuit, which is connected to the energy-harvester output, boasts never-before-seen levels of performance. It regulates the impedance at the input to the interface that optimizes the extraction yield (in excess of 95%). The circuit’s architecture boosts conversion yields (also in […] >>

Researchers at Irig collaborated with an international team to obtain dynamic coupling between two magnetic layers (yttrium iron garnet) separated by a gadolinium-gallium garnet substrate. These materials are all very good electrical insulators. The spin information can cross the substrate (which is neither magnetic nor electrically conductive) when the information is carried by chiral photons, […] >>