PCB circuit boards have a wide range of applications, ranging from military equipment to electronic daily necessities, and PCB boards are widely used. The main advantages are as follows:
1. Due to the repeatability (reproducibility) and consistency of the graphics, the wiring and assembly errors are reduced, saving the maintenance, debugging and inspection time of the equipment;
2, PCB circuit board design can be standardized, which is conducive to interchange;
3. PCB circuit board has high wiring density, small size and light weight, which is conducive to miniaturization of electronic equipment;
4. Conducive to mechanization and automated production, increasing labor productivity and reducing the cost of electronic equipment.
The manufacturing method of PCB circuit board can be divided into two categories: subtraction method (reduction method) and addition method (addition method). At present, large-scale industrial production is mainly based on the method of reducing copper foil in the subtraction method. In particular, the flexural resistance and precision of the FPC flexible board are better applied to high-precision instruments (such as cameras, mobile phones, video cameras, etc.).
When PCB is carrying out SMT chip processing (SMT), there are usually 3 methods (based on the situation of opening the steel mesh): all manual, semi-automatic, and fully automatic. All manual is to brush the steel mesh, and the electronic components are placed manually. Semi-automatic refers to b...
, and connect them to complete specific functions of the circuit. Compared with discrete component circuits, integrated circuits greatly reduce the volume, weight, number of lead wires and solder joints of point circuits, and improve circuit performance and reliability. The miniaturization, minia...
PCB circuit board proofing or board making requires a lot of information, and the difference in each item will have a huge impact on the final price. Size, board thickness, surface treatment, resistance resistance, solder mask coverage, solder mask color, gold finger, copper foil thickness, etc. ...