Taiwan Semiconductor Manufacturing Co. has achieved early production yields at its first plant in Arizona that surpass similar factories back home, a significant breakthrough for a US expansion project initially dogged by delays and worker strife.The share of chips manufactured at TSMC’s facility in Phoenix that are usable is about 4 percentage points higher than comparable facilities in Taiwan, Rick Cassidy, president of TSMC’s US division, told listeners on a webinar Wednesday, according to a ...