R. Segaud, T. Chêne, P. Gergaud, S. Minoret, F. Gustavo, J. Garrione, A. Royer, F. Nemouchi
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TaN thin film study for Superconducting BEOL integration
Superconducting materials integration is one of the emerging subjects for quantum applications. This paper proposes an integration scheme based on superconducting layer etching. A material selection is proposed for interconnections including metal and dielectric. Then, a focus is realised on TaN layers as a potential technological choice. The deposition process window is explored in term of N2 flow and thickness leading to a Tc up to 2 K for 40 nm of TaN.
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