The main material of IC card is plastic: PCV, PET, etc. The built-in IC integrated chip stores some security verification information for identity identification. According to different uses, IC cards are made into different size and shape structures, but the basic structure is to embed the IC integrated chip into the plastic base card. For example, the mobile phone SIM card is actually a kind of IC card, and its size is several: ordinary SIM card, Micro SIM card, Nano SIM card.