What are the causes of pcb short-circuit

A printed circuit board is a type of circuit board that is typically used to connect and support electronic components. Therefore, the quality of a printed circuit board directly affects the performance and stability of the entire circuit. Printed circuit board disconnection is one of the common faults in electronic products, which can cause the circuit to not work and affect the normal operation of electronic products. So, what are the reasons for circuit board disconnection?

1. Problems with board materials. If the material quality is not good, it can lead to the pcb being easily broken. Circuit boards are usually composed of fiberglass and resin, therefore, high-quality materials should be selected when selecting materials to make printed circuit boards.

2. Problems with the processing technology of printed circuit boards. Improper processing technology of boards can also lead to board breakage. Therefore, in the processing of printed circuit boards, it is necessary to continuously adjust the processing parameters to ensure the scientific and reasonable processing technology.

3. Problems with the usage environment of printed circuit boards. The environment in which the printed circuit board is used is also a factor that affects whether the board is disconnected. If used in humid or high-temperature environments, it can cause uneven expansion and contraction of the circuit board, leading to board fracture.

4. Poor maintenance. After using electronic products for a period of time, the electronic components on the board are prone to loosening. If not repaired and maintained for a long time, it can also cause the circuit board to break.

From the perspective of processing, there are mainly the following processes that may cause wire breakage.

1. Film application process: The film is not firmly applied, resulting in bubbles. If the film is wet, there may be garbage pollution.

2. Exposure process: Problems caused by scratches or garbage on the negative film, including exposure machine issues, insufficient exposure of local areas, etc.

3. Development process: The development is blurry and unclear.

4. Etching process: Excessive nozzle pressure and prolonged etching time.

5. Electroplating problem: Uneven electroplating or surface adsorption during electroplating.

6. Improper operation: During the production process of the circuit board, the circuit board was scratched and broken due to improper operation.

Analysis of the causes of PCB short-circuit: First, take a look at the form of short-circuit. Through the form of short-circuit, carefully analyze the production process that may cause wire breakage on the circuit board, and then gradually investigate the possible causes during the production process.

There are many reasons for short-circuit, but as long as prevention is the main focus, every problem can be better handled. When using electronic products, maintaining a dry and warm environment, regular maintenance, and using high-quality materials and rigorous processing techniques all play an indispensable role.