Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Hall Robert Noel B1

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Hall Robert Noel B1

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Image title: 
Robert Hall
Credit line: 
General Electric Research and Development Center, courtesy AIP Emilio Segrè Visual Archives

Robert N. Hall, scientist at the General Electric Research Laboratory, developed a new method of growing silicon crystals for transistors. With his 'meltback' process, transistors will have greatly improved frequency range as indicated on the blackboard in the background and will be useful in television, radar, shortwave radio, and other electronic devices where high-frequency requirements have previously called for bulkier vacuum tubes. Dr. Hall is shown holding one of the transistors. The tiny silicon crystal, barely discernible at the top junction of the wires above the supporting element, contains a center layer of material only 1/5000th of an inch thick.

Original format: 
1 photographic print (black and white; 10 x 8 inches)
Hall, Robert Noel,1919-