1. Metal packaging integrated circuit  
The functions of metal packaging integrated circuits are relatively single, with fewer pins. It is very convenient for installation and change  
2. Power plastic seal integrated circuit  
The power plastic seal integrated circuit generally has only one column pin, and the number of pins is generally 3 ~ 16.  
Its internal circuits are simple and are used for high -power circuits. Usually there are heat sinks, which can be packed on other metal heat sinks. Generally, their pins do not perform special bending treatment  
3. Single -column direct integrated integrated circuit  
The internal circuit of a single -column direct -integrated integrated circuit is relatively simple. The number of pins is small (3 ~ 16), only a row of pins. This integrated circuit costs low cost and easy to install. Small integrated circuits mostly use this form of packaging  
4. Dual -column direct -inserted integrated circuit  
Double -column direct -inserted integrated circuits are mostly rectangular structures. The two rows of pins are led by both sides. This integrated circuit internal circuits are more complicated. Generally, ceramic plastic seals are used. Usually, it is straight and no special bending treatment is performed.  
5. Dual -column surface installation integrated circuit  
The pin distribution of the dual -column surface installation circuit is on both sides, with a large number of pins, generally 5 ~ 28.  
The dual -column surface installation integrated circuit pins are very fine and have special bending treatment, which is convenient to paste on the circuit board.  
6. Flat packaging integrated circuit,  
The number of pins of the flat packaging type integrated circuit is large, and the gap between the pins is small. Mainly installed on the circuit board by surface installation technology. This integrated circuit is very common in digital products. It has powerful functions and small volume. It is difficult to repair and replace (requires professional tools)  
7, rectangular needle pin insertion integrated circuit  
There are many pins of rectangular needle insertion integrated circuits. The internal structure is very complicated and powerful. This integrated circuit is mostly used in highly intelligent digital products. For example, the central processor (CPU) in the computer mostly uses needle -footed enclosure forms.  
8. Ball array column -type integrated circuit  
The ball grid array integrated circuit is small in size, and the pins are below the integrated circuit (therefore, the pins are not visible around the integrated circuit), the shape is spherical, and the surface patch welding technology is widely used in small digital products. Such as the signal processing integrated circuit of the new mobile phone.