Photos: Integrated circuit celebrates 50th birthday
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The Computer History Museum has notebooks of Jean Hoerni and Robert Noyce on display as part of its collection.
After Fairchild developed the NPN mesa transistor, which had major reliability problems, Hoerni developed the first planar transistor in March 1959, and then engineered a stable planar manufacturing process.
May 9, 2009 1:01 PM PDT
Photo by: Computer History Museum
