Taiwan Semiconductor Manufacturing Co (TSMC) has pledged an additional US$100 billion to expand its manufacturing facilities in Arizona, boosting the company’s US investment to US$265 billion, as the chip foundry rushes to meet booming demand driven by artificial intelligence.TSMC chairman CC Wei said the firm planned to proceed “as fast as possible” with the new Arizona investment but declined to provide a timeline, noting that progress would “depend on the market situation and our customers’...