The 2020s began the angstrom era where the branding of the most recent chip technologies is stated in angstroms. This was a marketing decision and not a technical measurement.
There are approximately 10 angstroms per nanometer, and once the branding reached one and two nanometers, in order to publish ever-decreasing numbers, angstroms were chosen. For example, Intel has used 18A and 20A. To review the full evolution, see
chip feature size. See
angstrom and
Intel node names.