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's[4] Arizona page gives only a span: "Third Fab: In April 2025, TSMC broke ground on the site of the third fab, slated for N2 and A16 process technologies. Targeting volume production by the end of the decade." - so the decade's last day, estimated.
TrendForce relays an Economic Daily News report that the third fab could reach mass production as early as 2027 on 2nm and A16 as US customers press for local capacity - an unconfirmed pull-in that TSMC's[1][4] own page has not adopted.
Arizona's Family reports the groundbreaking on Tuesday 29 April 2025 near 43rd Avenue and Dove Valley Road during Commerce Secretary Howard Lutnick's visit, repeating TSMC's[1][4] 2nm-or-better node and production 'by the end of the decade'.
TSMC's[1] release announcing the third Phoenix fab alongside up to US$6.6 billion in proposed CHIPS Act funding: it 'will produce chips using 2nm or more advanced processes, with production beginning by the end of the decade', taking TSMC's Arizona capital spending above US$65 billion.
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