3nm chip and 28nm chip have the following differences.
1, in terms of process, the 3nm chip is an advanced process chip, and the 28nm chip is a mature process chip.
2, in terms of application, many chips in our daily life are still based on mature processes of 28nm and above. Including the current most popular 5G network, artificial intelligence, new energy vehicles, UHV industry, etc., and 28nm chip in performance, energy consumption, cost-effective.
3, in terms of manufacturing, 28nm chips TSMC, Samsung, SMIC and other chip foundries can be mass produced, 3nm chips only TSMC, Samsung is developing, are not mass produced.