Title
First transistor
Catalog Number
102748481
Type
Still image
Description
A plastic wedge secured two gold contacts to the first transistor’s germanium surface. Voltage applied to one contact modulated the current flowing through the other, amplifying the input signal up to 100 times.
Date
1947
Publisher
Bell Laboratories
Format
Transparency
Category
Identification photograph
Credit
Courtesy of Gwen Bell
