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Nanofabrication engineer

Permanent contract

C12 develops reliable & application-specific quantum computers, to solve highly complex computing tasks, currently out of reach of even most powerful supercomputers.

Building a quantum computer still needs innovators ready to tackle exciting challenges. C12 founders are convinced that only a new material for the qubit will bring a technological breakthrough.

C12 uniquely uses carbon nanotubes as the fundamental building blocks of its quantum processor. This high-purity material minimizes errors, radically improves performance and reduces hardware overhead for fault-tolerant computing. Combined with well-established semiconductor techniques, carbon nanotubes will help scale quantum computing, just as silicon revolutionized classical computing.

Founded in 2020, C12 is a fast-growing start-up, having raised a seed round of USD 10 million in June 2021 and building its own lab space in the center of Paris.

C12’s unique technology

At C12, a qubit, the fundamental functional unit of a quantum computer, is built from an ultra-pure carbon nanotube suspended above a silicon chip containing control electrodes and a quantum communication bus. Spin qubits coupled to a microwave cavity brings interesting perspectives for their individual control and manipulation as well as for the circuit architecture. A suspended isotopically pure 12C nanotube holds great promises in terms of stability, as it reduces all sources of decoherence (charge noise, nuclear spin noise, phonon relaxation).

C12 encourages all who feel qualified to apply. Recruitment decisions are based solely on qualifications, skills, knowledge and experience. Applications from women are particularly welcomed.

Your role at C12 Quantum

We are looking for a nanofabrication engineer for the fabrication of electronic circuits chips in our cleanroom. These printed circuits enable the control & read-out of our qubits and include superconducting resonators as well as superconducting & magnetic gate electrodes.

Your job will involve:

The nanofabrication of chips

The calibration of the tools and the monitoring of this calibration (dry etch, e-beam) by using metrology tools (AFM, SEM)

Helping to create, develop and maintain process documentation

Identifying potential limiting factors to quality and repeatability of the nanofabrication process

Designing and implementing procedures/tools to enhance throughput

Taking care of the regular maintenance of the clean room’s main equipment (e-beam, evaporator, SEM, etc.) with the help of the lab manager

As part of the nanofabrication team, you will have interactions with the quantum device design teams to improve overall circuit performance.

About you
  • Master or Ph.D. in Physics, Experimental Physics, Materials Science and Engineering, Nanotechnology, Nanoscience or a related field
  • Previous experience (> 6 months) performing multi-step nanofabrication autonomously in a clean room with the following processes or tools: 
  • Dry etch (required)
  • Wet processes (cleaning, resist spinning and wet etch) (required)
  • Metrology tools (SEM, AFM) (required)
  • Metal evaporation (desirable)
  • Wafer dicing (desirable)
  • Wafer-scale and photolithography experiences (advantage)
  • Electron-beam lithography of precisely defined sub-micron features (advantage)
  • Meticulous attention to detail
  • Good English language and written skills
You should join us if
  • You want to contribute to achieve landmark results in quantum computing, making a difference in the emerging quantum technologies
  • You want to work within a 26-people team with various backgrounds in nanofabrication, quantum electronics, and carbon nanotube science to create a revolutionary quantum computing processor
  • You want to thrive in a exceptional scientific environment with several industrial and academic partners
  • You relate to our values (excellence, scientific integrity, diversity, curiosity, and care) and want to help us define our product-focus culture and ambition to accelerate
Submit your resume to join the quantum race