There's a rumor that TSMC Phoenix will be bigger than what was originally announced. UDN appears to be the original source of this information:
udn.com
Phoenix Business Journal seems to collaborate the UDN article:
www.bizjournals.com

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Phoenix Business Journal seems to collaborate the UDN article:

Reports: Taiwan Semiconductor's Phoenix plant likely three times larger than originally announced - Phoenix Business Journal
The Taiwan Semiconductor Manufacturing Co. plant in north Phoenix could end up being much bigger than originally announced, and the first phase will total 3.8 million square feet of buildings.
