A solid-state amplifier
The point-contact transistor made modern computing possible. Chips now hold tens of billions of transistors each, and the problem shifted from building one to making them smaller.
Evidence tier V3 is the import default for a result the curation records as settled in the published record. No formal proof or certificate is attached to this page yet.
Closed 1947, John Bardeen, Walter Brattain and William Shockley at Bell Labs.
Sources
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