Walter H. Schottky
Walter Hans Schottky was a German physicist who played a major early role in developing the theory of electron and ion emission phenomena, invented the screen-grid vacuum tube in 1915 while working at Siemens, co-invented the ribbon microphone and ribbon loudspeaker along with Dr. Erwin Gerlach in 1924 and later made many significant contributions in the areas of semiconductor devices, technical physics and technology.
From *.wikipedia.org,
General Info
.
Male
Date of Birth
July 23rd, 1886
Age
139
Birth Place
Switzerland, Canton of Zürich
Date of Death
March 4th, 1976
Died Aged
89
Star Sign
Cancer
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