This is a photograph of a Texas Instruments' Solid Circuit circa 1960 mounted in an open-top flat package. It comprises multiple etched mesa active and passive elements interconnected with gold "flying-wires" as developed by Jack Kilby. The function is unknown. The device is in the collection of the Computer History Museum. See Kilby's paper “Invention of the integrated circuit,” IEEE Transactions in Electron Devices, Vol. ED-23, No. 7 (July 1976) pp. 648-654.
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