The investing conglomerate is looking to team up with TSMC on the initiative as SoftBank continues to pour money into AI.

SoftBank founder Masayoshi Son is pushing the idea of a vast $1tn artificial intelligence and robotics complex in the US state of Arizona that could include the establishment of a free-trade zone and the involvement of the world’s biggest chipmaker, TSMC.

SoftBank's founder has a vision for bringing high-tech manufacturing back to the U.S. Arizona might be at the center of it all.