Walter H. Schottky (July 23, 1886, Zürich, Switzerland - March 4, 1976, Pretzfeld, West Germany) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens. In 1938, Schottky formulated a theory predicting the Schottky effect, now used in Schottky diodes. July 23 is the 204th day (205th in leap years) of the year in the Gregorian Calendar, with 161 days remaining. ... 1886 (MDCCCLXXXVI) is a common year starting on Friday (click on link to calendar) // Events January 18 - Modern field hockey is born with the formation of The Hockey Association in England. ... Location within Switzerland â–¶ (help· info) (German pronunciation IPA: ; in English often Zurich, without the umlaut) is the largest city in Switzerland (population: 366,145 in 2004; population of urban area: 1,091,732) and capital of the canton of Zürich. ... March 4 is the 63rd day of the year in the Gregorian Calendar (64th in leap years). ... 1976 (MCMLXXVI) is a leap year starting on Thursday (link will take you to calendar). ... 1915 (MCMXV) was a common year starting on Friday (see link for calendar). ... 1919 (MCMXIX) was a common year starting on Wednesday (see link for calendar). ... Siemens AG (FWB: SIE, NYSE: SI) is the worlds largest electronics company. ... 1938 (MCMXXXVIII) was a common year starting on Saturday (link will take you to calendar). ... The Schottky diode (named after German physicist Walter H. Schottky) is a semiconductor diode with a low forward voltage drop and a very fast switching action. ...

He was awarded the Royal Society's Hughes medal in 1936 for his discovery of the Schrot effect (spontaneous current variations in high-vacuum discharge tubes, called by him the "Schrot effect": literally, the "small shot effect") in thermionic emission and his invention of the screen-grid tetrode and a superheterodyne method of receiving wireless signals. The premises of the Royal Society in London. ... The Hughes Medal, named for microphone inventor David Edward Hughes, is one of several medals awarded by the Royal Society, Englands reigning academy of science. ... 1936 (MCMXXXVI) was a leap year starting on Wednesday (link will take you to calendar). ... Walter H. Schottky (July 23, 1886, Zürich, Switzerland - March 4, 1976, Pretzfeld, West Germany) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens. ...

External links

• Biography of Walter H. Schottky