The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
TSMC[2] said it had "pushed up the mass production schedule for its second wafer fab in the U.S. state of Arizona to the second half of 2027 from the previously planned 2028," naming a half-year rather than a day.
TSMC's own Arizona page: "Second Fab: Construction was completed on the fab structure in 2025. Volume production on N3 process technology targeted for the second-half of 2027."
Reports C.C. Wei on TSMC's[2] Q1 2026 call: in Arizona "construction of a second fab has been completed with commercial production slated for the second half of 2027 using the 3nm process".
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