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Pcb manufacturing process

How to distinguish the quality of the circuit board

  • 2019-04-22 12:31:13

With the rapid development of mobile phones, electronics and communications industries, it has also contributed to the continuous growth and rapid growth of the PCB circuit board fabraction industry. But the question that comes with it is, how do we distinguish the quality of the PCB circuit board? We can mainly start from two aspects; the first method is to judge from the appearance; on the other hand, it is judged from the quality specification requirements of the PCB board itself.

The method to judge the quality of the PCB board:

First: distinguish the appearance of the board from the appearance, It can be analyzed and judged through three aspects;

1. Standard rules for size and thickness.

The real size and the board thickness might be different from the standard. The customer can measure and check the thickness and specifications according to their requirements to see if the different tolerance is acceptable.

2. Surface and color.

The external circuit board has ink coverage, so the circuit board can play the role of insulation. If the color of the board is not bright enough or there is less ink, the insulation board itself is not good.

3. The appearance of the weld.

since there are large number of parts on the circuit board, if the welding is not good enough, the circuit board that the parts are easy to fall off, seriously affecting the welding quality of the circuit board.  And if the appearance is good, it is very important to carefully identify the interface.

Second: high-quality PCB circuit boards need to meet the following requirements:

1. It is required to use the telephone after the component is installed, which means the electrical connection should meet the requirements;

2. The line width, line thickness and line spacing of the line should meet the requirements to avoid heating, disconnection, and short circuit of the line;

3. It is not easy to fall off due to high temperature copper skin;

4. The copper surface is not easily oxidized, affecting the installation speed, and it will be destroyed soon after oxidation;

5. The shape is not deformed, so as to avoid deformation of the outer casing after installation and the screw holes are misaligned. Now it is mechanized installation, the hole position of the circuit board and the deformation error of the line and design should be within the allowable range;

6. High temperature, high humidity and special environment should also be considered;

The above is the method of judging whether the PCB circuit board is good or not. When purchasing the PCB circuit board, be sure to polish your eyes.  If you want to learn more about pcb fabrication and layout

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