Integrated circuit is generally refers to the integration of the chip, like the north bridge chip on the motherboard, the CPU inside, are called integrated circuits, the original name is also called integrated blocks. The PCB refers to the circuit board we usually see, and the welding chip is printed on the circuit board. Understanding of the relationship between the two: The integrated circuit (IC) is welded on the PCB board; The PCB board is the carrier of the integrated circuit (IC).
In simple terms, the integrated circuit is to integrate a general circuit into a chip, it is a whole, once it is damaged inside, the chip is damaged, and the PCB can weld its own components, broken components can be replaced.