Related to development of semiconductor devices, especially transistors. The original computers used punched holes. In some way it’s an extension of that same idea

Edit: for the curious, some accessible intros

https://www.livescience.com/20718-computer-history.html

https://theconversation.com/what-is-a-semiconductor-an-electrical-engineer-explains-how-these-critical-electronic-components-work-and-how-they-are-made-188337

https://news.stanford.edu/stories/2023/09/stanford-explainer-semiconductors