Fairchild integrated circuit flip flop mounted on TO-18 header
One version of the Fairchild Semiconductor Micrologic F element integrated circuit mounted on a TO-18 header. This object is an engineering prototype that embodies a design that was not used in the subsequent commercial product. The Micrologic F element is a 4-transistor flip flop circuit. It was the first monolithic integrated circuit, and it was produced using the planar process. This device was produced using a physical isolation proof of concept process involving etching from the rear and back-filling with non-conducting epoxy material. See X4731.2008, Accession #: 102696650 for example of the PN junction isolation production process employed after September 1960.