Former Arm boss Tudor Brown quits SMIC as US - China relations sour Former Arm boss Tudor Brown quits SMIC as US - China relations sour Brown is the latest of several individuals with UK or US nationality to have left the Chinese chipmaker ’s board Debby WuTudor Brown . Picture: BLOOMBERGTudor Brown , the former president of Arm , has resigned from the board of Semiconductor Manufacturing International Corp ( SMIC ), stepping away from the Chinese chipmaker that has been hit with US sanctions. Brown , a celebrated engineer who was part of Arm ’s founding, is leaving...