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.

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TSMC U.S. President Rick Cassidy said in an October 23 webinar that its Phoenix, Arizona fab achieved a 4% better yield than comparable manufacturing sites in Taiwan. According to Bloomberg, this is a key metric for TSMC,