# Walter Schottky

| *July 23rd 1886, in Zürich, Switzerland †March 4th1976, in Pretzfeld, Germany
| I apologize to whoever wrote this text (in German). I forgot where I found it. here is (an occasionally embellished) translation
| Walter Schottky was a German physicist.
|  | After he finished his education, he taught Physics as a Professor at the University of Rostock (Germany) from 1923 to 1927.
|  | After that he switched to Siemens & Halske, where he worked in Berlin and Pretzfeld (obscure town in Bavaria, where Siemens kept a Research center). He conducted basic research in semiconductor physics (better known by then as "dirty physics" and with no products to speak of) and Electronics (meaning whatever one did with vacuum tubes). The Schottky effect was named after him (meaning a special mode for electron emission from hot filaments), the Schottky diode, Schottky defects and the Schottky equation (also know as Schottky-Langmuir law of space charges)
|  | He conducted important research towards the "Schrot" effect (how does noise come about in electron currents?), space charge topics (not only in semiconductors, but also in vacuum tubes, etc.) and about blocking behavior of semiconductors (then still a kind of puzzle).
|  | 1915 he invented the tetrode (a special vacuum tube of large importance) and 1918 the "Superhet" principle for radio receivers (not much radio in 1918 yet!).

With frame

2.1.3 Schottky-Defects

© H. Föll (Defects - Script)