2N107 germanium alloy junction PNP transistor (General Electric (GE))

The idea
The production of a cheep and efficient early era 3 transistor microchip for basic electrical functions.

Manufacturing
The then standard silicon\germanium etching process.

Casing
A 3 legged metallic TO-18 transistor packing unit shell. T-18 stands for Transistor Outline Package, Case Style 18. The Philips TAA320 integrated circuit was often mistaken for the 2N107 germanium alloy junction PNP transistor (General Electric (GE)) transistor at the time.

Also see

 * Science
 * Integrated circuits