PCB manufacturing process: First, cut the sub copper sheet into small pieces, then apply a layer of photosensitive wet film, and send it to a machine to project ultraviolet light through the template to make the circuit graphics appear on the new inner board. Then, use sodium carbonate to wash all the drawings except for the circuit graphics, and then perform optical detection. Then, use the PP semi-solid picture film and multiple new memory versions to conduct the mosaics and laminations, Then the multilayer plates were fabricated by heating and hot pressing under vacuum conditions.

In order to transmit the electronic signal to each layer of the circuit board, as many as 2000 holes need to be drilled in the circuit board. These holes are like guiding the electronic signal to the correct line entrance. After drilling, the processes such as copper plate electricity are carried out successively to increase the conductivity between the same layers. The next step is that the outer layer graphics are generally the same as the inner layer graphics through several processes such as photosensitive development graphics electroplating, outer layer lithography, and then add solder resist to heat and bake to form a green hard surface protective copper wire. At this stage, the color of solder resist can be selected, but usually the manufacturer uses green because it is helpful for defect inspection, Because it has high contrast and trace visibility, which is critical for PCB prototyping. The color of the solder mask usually does not affect the function of the circuit board. Although the darker color is more heat absorbing, it is impractical for high temperature applications. After the wire solder mask is completed, start to solder the electronic components. They direct the current to the correct circuit just like AC channels and intersections. Finally, according to customer needs, such a circuit board as cutting and forming and efficiency testing is completed.

PCB manufacturing is a detail intensive process, and even simple mistakes will cause enterprises to pay a price due to incorrect construction. When selecting your PCB manufacturing company, consider using a PCB manufacturer with a successful record.

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