How transistor shrinking works and where quantum tunneling becomes the wall

Moore's Law is an empirical observation — not a physical law — first articulated by Gordon Moore in 1965 while he was director of R&D at Fairchild Semiconductor. Moore observed that the number of components on an integrated circuit had been roughly doubling annually and projected continued growth. In 1975, after co-founding Intel, he revised the doubling cadence to approximately every two years.