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I remember watching a documentary about early works in quantum physics and how it was essential to the microelectronics revolution and the invention of the transistor. What part exactly helped? Is there a source on technical aspects that lead to such development?

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One word: Semiconductors.

Semiconductor physics cannot be explained using classical physics. One needs to understand the electronic band structure of these materials in order to engineer various devices (e.g., p-n junctions, p-n-p junctions etc.) using them. Without such basic devices we won't be able to engineer modern electronic devices.

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  • $\begingroup$ Very helpful indeed! Thanks a lot for the quick answer. $\endgroup$ – mskayyali Jul 8 at 14:30
  • $\begingroup$ And, if we are talking of modern devices, then in addition to p-n junctions one should also mention heterostructures. $\endgroup$ – Ruslan Jul 8 at 14:38

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