French Team on Route Towards an Interposer Prototype for Quantum And Control Chips Integration at Very Low Temperature

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Platform Optimizes Control and Readout of Qubits by Placing Control Electronics Near Quantum Chips Without Wire Bonding

www.myscience.org, Feb. 04, 2021 – 

GRENOBLE, France - Feb. 4, 2021 - A team of French scientists has started to build a prototype interposer that meets requirements of quantum computing by allowing integration and testing of both quantum and control chips fabricated from different materials and technologies and coming from different partners.

• Known as QuIC3, which stands for quantum integrated circuits with CryoCMOS , the prototype demonstrator controls quantum chips by embedding control electronics near the quantum chip inside a dilution cryostat at T<1K. This temperature range is required for reliable operation of qubits, the fundamental or logic units of quantum computers. The demonstrator is made from an interposer in silicon on which quantum chips and control electronics are integrated by 3D flip-chip processes. The control electronics are fabricated on standard FDSOI 28nm-node technology and manufactured by STMicroelectronics.
• The team included scientists at CEA-Leti, CEA-List and Néel Institute at the French National Centre for Scientific Research (CNRS).

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