The Printed Circuit Board Assembly Process

 printed circuit board assembly

Printed circuit board assembly requires a number of individual stages to create the final product. While each stage is required, they can be done individually and do not require a specific order. While a printed circuit board could be assembled in one's home, the process is made far easier if a person has electrical and engineering experience. Advances in technology have allowed the process to be simplified and quickened exponentially in recent years. The process has been optimized to achieve very few defects and maximize efficiency.

Solder Paste
 printed circuit board assembly

Before any parts can be laid on the board, a paste must be applied that will hold the components in place. Solder paste is a specialized mixture of flux and small grains of solder that have been mixed together. After the solder paste has been laid, the board must then be loaded with reels of components that put each part in their specific place.

Soldering
Once all the components have been placed on the board, they must be hardwired into place by passing through a soldering machine. Essentially, the parts are welded into place so that they cannot move or become loose once the printed circuit board has been installed in an electrical product.

 printed circuit board assembly



Inspection
 printed circuit board assembly

After the boards have gone through soldering, they must be inspected. Because of time and budget constraints, it is not possible for the boards to be inspected by the human eye. Instead, they are passed through a machine that uses automatic optical inspection to check for misplaced components and loose soldering. If a mistake is found, the board will have to be corrected before it can be sent for final production.

Test
In order to ensure that a consumer product is in good working, it must be tested before it leaves the factory. Testing can occur both manually and automatically, but it is imperative that verification be done because the factory's reputation is always on the line. Once the printed circuit board has been placed in a shipped electronic, the feedback process begins. During this process, the assembly line is reviewed to ensure that no mistakes were made. Any problems that are found must be rectified immediately.