Soon after Bardeen, Brattain, and Shockley invented a solid-state device in 19471 to replace electron vacuum tubes, the microelectronics industry and a revolution started. Since its birth, the industry has experienced four decades of unprecedented explosive growth driven by two factors: Noyce and Kilby inventing the planar integrated circuit2,3 and the advantageous characteristics that result from scaling (shrinking) solid-state devices. © 2006 Elsevier Ltd. All rights reserved.
Thompson, S. E., & Parthasarathy, S. (2006). Moore’s law: the future of Si microelectronics. Materials Today, 9(6), 20–25. https://doi.org/10.1016/S1369-7021(06)71539-5