Substrate: Many PVC material, also has the plastic or the paper system
Contact Surface: Metal material, usually copper flakes, the input and output of the integrated circuit is connected to the large contact surface so that the operation of the reader can be facilitated, and the large contact surface will also help to prolong the service life of the card. Contacts generally have 8 (C1 C2 C3 C4 C5 C6 C7 c8,c4 and C8 designed for future retention), But for historical reasons some smart cards are designed to be 6 of contacts (C1 C2 C3 C5 C6 C7). In addition, C6 original design for the EEPROM power supply, but because later the EEPROM required program voltage (programming voltage) by the chip directly control, so C6 is usually no longer used.
Integrated chip: Usually very thin, within 0.5mm, diameter of about 1/4 centimeters, generally rounded, square also have, internal chip generally have CPU RAM ROM EPROM.
Kanner os cos (Chip keyboard-based system). The Kanner operating system is used to respond to the instructions that the external device sends to the card, such as verification calculation, read and write data, reading card number, writing key, locking the data area, illegal operation to automatically destroy the relevant settings of the card, verifying the reader's permission and so on.
Kanner stored data, generally stored data are: Verify the card reader permissions with the algorithm, the authenticated key, card number, data area (such as: Shenzhen Tong, Yangcheng Pass, such as bus cards can be saved balance, the date of the card, the parking lot card can save the time, the meal card can save the remaining amount, user information).