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Perhaps I was a bit vague. Sorry. Not much sleep has passed my way of lately.
Hybrid IC
An Integrated Circuit that is composed of more then one type technology. Where for instance. Integrating the Graphene portions of circuit devices onto say a MOS (metal oxide semiconductor) die (chip). Where the Graphene circuitry would act as extremely fast I/O (Input and Output) sections of the circuit. And the MOS portions in between might be a specialty CPU, (Central Processor Unit), perhaps a DSP (digital signal processor) communication circuitry, etc..
The goal. the I/O operate at extremely high frequencies, say in photonic applications that talk to the bulk of the system's logic in the form of slower MOS silicon based traditional type circuitry. In some cases there may be a enormous amount of processing required, so the idea is to allow for information coming into the chip to run at speeds far exceeding the clock rates applicable for the MOS portions, let the processor, whatever, do it's processing, then ship the information (data) to the output stage where it can again at higher speeds transfer the information say into a fiber optic cable or perhaps into some specialty device say a amplifier that feeds say a radar antennae, or some specialty electronics within say a medical instrument.
Hope that helps a little.