TSMC founder and government trade envoy for Taiwan, Morris Chang, has confirmed plans for 3nm chip production at the new TSMC Arizona fab.When asked about 3nm in Arizona, Chang told reporters that TSMC has plans for the more advanced process, but they were not yet completely finalized.“Five-nanometre is phase one, 3-nanometre is phase two.”During the APEC event, Chang met with a number of political and business leaders, with several asking him about possible TSMC expansions in their countries.Now we know 3nm family chips will be coming from TSMC Arizona (phase two) in due course.All this positive news for TSMC and demand for its output makes Warren Buffet’s $5B investment a week ago look rather canny."