Firstly I'd note that some commentators are saying this number (3nm) is a meaningless marketing term. That's not correct. 3nm means the smallest feature - eg,

Firstly I'd note that some commentators are saying this number (3nm) is a meaningless marketing term. That's not correct. 3nm means the smallest feature - eg, the width on a channel[1] not the size of a transistor. There are quantum effects at this level (and indeed parger), and one of the big challenges with process design is minimusing them. See [2] for an overview. [1] https://www.electropages.com/blog/2022/05/samsungs-3nm-technology-what-do-we-know https://www.electropages.com/blog/2022/05/samsungs-3nm-techn... [2] https://semiengineering.com/quantum-effects-at-7-5nm/ https://semiengineering.com/quantum-effects-at-7-5nm/ [1] https://www.electropages.com/blog/2022/05/samsungs-3nm-technology-what-do-we-know https://www.electropages.com/blog/2022/05/samsungs-3nm-techn...