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Séminaire Département Nanophysique (DEPHY)

CMOS-compatible materials and processes for spintronic applications in 300mm R&D

Mercredi 23 octobre 2019 à 14:00, Salle de séminaire 445, bâtiment 1005, CEA-Grenoble

Publié le 23 octobre 2019
Maik Wagner-Reetz
Fraunhofer IPMS, Dresden ​
Spin-based implementations like e.g. Magnetic Random Access Memory (MRAM) or Racetrack Memory (RTM) are possible approaches to overcome fundamental scaling limits and to increase storage density. The charge-to-spin-conversion and vice versa is a key element in spin-based computing systems and is addressed in recent research. Spin-Orbit-Coupling phenomena play a vital role in both, Spin-Orbit-Torque MRAM and RTM, where new materials with high Spin Hall Angles are needed. Therefore, several materials ranging from (heavy) metals to binary compounds could be considered, like e.g. CoSi, TaP or W3Ta. A CoSi process sequence including wet chemical silicon oxide removal, Cobalt CVD deposition with annealing is available. For TaP and W3Ta a CMOS-compatible thin film process is not yet available. The CMOS-compatible compounds are theoretically predicted to have high Spin Hall Angles. Several open questions, like e.g. influences of interfaces or grain boundaries have to be addressed in order to pave the way for new unconventional approaches. In this talk we want to focus on the CMOS-compatible fabrication and analytics of such thin films. Our new 300mm MRAM sputter system with mixed protocol zone environment is a key to get access to state-of-the-art materials and beyond. Besides the material fundamentals, we also focus on integration issues, like e.g. MTJ scaling to sub 50nm structures.