Integrated circuit is a kind of micro-electronic device or component. Using a certain process, the required transistors, resistors, capacitors, inductors and other components and wiring interconnect in a circuit, the production of a small piece or a few small pieces of semiconductor chip or dielectric substrate, and then encapsulated in a shell, become a required circuit function of the micro structure; All the components have formed a whole in the structure, which makes electronic components towards miniaturization, low power consumption, intelligence and high reliability has taken a big step forward.
Can structure integrated circuit, also known as IC, according to its function, structure, can be divided into analog integrated circuit into the circuit, digital integrated circuit and digital/analog hybrid integrated circuit three categories. Analog integrated circuits, also known as linear circuits, are used to generate, amplify, and process a variety of analog signals. For example, audio signal of semiconductor radio, tape signal of recorder, etc.), its input signal and output signal are proportional to each other. Digital integrated circuits (dics) are used to generate, amplify, and process various digital signals. Such as 3G mobile phone, digital camera, computer CPU, digital TV logic control and playback of audio signal and video signal).
Integrated circuit manufacturing process

Integrated circuit according to the production process can be divided into semiconductor integrated circuit and membrane integrated circuit. Film integrated circuit and classification of thick film integrated circuit and film integrated circuit. Integrated circuit integration can be divided into:

SSIC Small Scale Integrated circuits

Medium Scale Integrated circuits

LSIC Large Scale Integrated circuits

VLSIC Very Large Scale Integrated circuits

ULSIC Ultra Large Scale Integrated circuits

GSIC vlsi is also known as msi or Giga Scale Integration.
Integrated circuit can be divided into bipolar integrated circuit and monopole integrated circuit according to the type of conduction, they are digital integrated circuit. The fabrication process of bipolar IC is complex and the power consumption is large, which means the IC has TTL, ECL, HTL, LST-TL, STTL and other types. Unipolar integrated circuit is easy to make, with simple manufacturing process and low power consumption. It is easy to make large-scale integrated circuit, which represents CMOS, NMOS, PMOS and other types of integrated circuit.