Chiang Shang-yi, a Taiwanese semiconductor industry veteran who helped build the world’s largest contract chip foundry, called his decision to join mainland China’s top chip maker “one of the foolish things” he had done, according to a newly released interview transcript. The former Taiwan Semiconductor Manufacturing Co (TSMC) executive, who headed the company’s research and development until 2006, made the comment during a March interview with the California-based Computer History Museum (CHM). Following his retirement from TSMC, Chiang, now 76, served as an independent non-executive director at Shanghai-based Semiconductor Manufacturing International Corp (SMIC) from December 2016 to June 2019. He…