Not for silicon, as far as I know. https://www.bayjournal.com/columns/past_is_prologue/you-probably-dont-know-mark-olson-yet-he-affected-you-just-the-same/arti

Not for silicon, as far as I know. https://www.bayjournal.com/columns/past_is_prologue/you-probably-dont-know-mark-olson-yet-he-affected-you-just-the-same/article_e49e934c-6e2a-56e3-aadd-1fe79fac2cd5.html https://www.bayjournal.com/columns/past_is_prologue/you-prob... From his obituary: "A critical component in the design was a diode that would allow electrons to flow in one direction only, requiring the use of pure silicon. Mark's research at DuPont pinpointed a way to purify the element, and he himself grew the first crystal of hyper-pure silicon. This forged the way for DuPont to embark on a silicon production program that over the next 50 years led to the development of radar, silicon transistors, semiconductors and the Silicon Valley computer phenomenon." https://somd.com/announcements/obits/name/4855-Carl-Marcus-Olson.html https://somd.com/announcements/obits/name/4855-Carl-Marcus-O...