PCB Technical - PCB environmental protection and PCBA quality control

At present, the country has higher and higher requirements for environmental protection and greater efforts in link governance. This is a challenge but also an opportunity for PCB factories. If PCB factories are determined to solve the problem of environmental pollution, then FPC flexible circuit board products can be at the forefront of the market, and PCB factories can get opportunities for further development.

The Internet era has broken the traditional marketing model, and a large number of resources have been gathered together to the greatest extent through the Internet, which has also accelerated the development speed of FPC flexible circuit boards, and then as the development speed accelerates, environmental problems will continue to appear in PCB factories. In front of you. However, with the development of the Internet, environmental protection and environmental informatization have also been developed by leaps and bounds. Environmental information data centers and green electronic procurement are gradually being applied to the actual production and operation fields. From this point of view, the environmental protection problems of PCB factories can be solved from the following two points.

1. Focus on product innovation in energy saving and emission reduction. PCB factories must learn to attach importance to Internet technology and realize the practical application of automated monitoring and intelligent management in production through the integration of overall industry knowledge.

2. Pay attention to the trend of environmental protection informatization and the development of various environmental protection technologies. PCB factories can start with big data to monitor the company's pollution discharge and treatment results, and find and solve environmental pollution problems in a timely manner. Keep up with the production concept of the new era, continuously improve resource utilization, and realize green production. Efforts to enable the PCB factory industry to achieve an efficient, economical and environmentally friendly production model, and actively respond to the country's environmental protection policy.

There are many links in PCBA patch processing, and the quality of each link will affect the quality of the final product, so every link must not be careless, and quality control must be done at every step.

1. PCB circuit board

After the PCBA factory receives an order for PCBA patch processing, the first thing to do is to analyze the Gerber file, considering the hole spacing of the PCB and the carrying capacity of the board, wiring will cause high-frequency signal interference, impedance and other factors.

2. Procurement and inspection of components

The purchase of components requires quality assurance through channels, and it is best to pick up the goods from large traders and original factories. Strictly inspect the incoming materials.

3. SMT Assembly processing

Solder paste printing and reflow oven temperature control are the main points. The quality of the laser stencil must be good and meet the process requirements. The steel mesh is made according to the requirements of PCB. The furnace temperature and speed of reflow soldering need to be strictly controlled. Strict implementation of AOI testing can reduce defects caused by human factors.

4. Plug-in processing

In the process of plug-in processing, the mold design for wave soldering must meet the requirements, and the use of molds can maximize the probability of good products after the furnace.

5. Program firing

In the DFM report, it is recommended to the customer to set some test points on the PCB to test the PCBA circuit continuity after soldering all the components. According to the program provided by the customer, the program can be burned into the main control IC through the burner, and the function changes brought by various touch actions can be tested, and then the function of the whole PCBA can be checked by this.

6. PCBA board test

For PCBA patch processing boards, the main test content is ICT, FCT, aging test, temperature and humidity test, drop test, etc.