Judgment method of PCB circuit board China manufacturer

Judgment method of PCB circuit board

Due to fierce market price competition, the cost of PCB board materials is also rising. More and more manufacturers are monopolizing the market at low prices in order to enhance their core competitiveness. However, behind these ultra-low prices, it is obtained by reducing the cost of materials and manufacturing costs, but devices are usually prone to cracks (cracks), easy to scratch, (or scratches), and the comprehensive factors such as precision and performance have not reached the standard , Which seriously affects the solderability and reliability of the products used.

In the face of the wide variety of PCB circuit boards on the market, distinguishing the quality of PCB circuit boards can be done from two aspects; the first method is to judge from the appearance, and the other is to judge from the quality requirements of the PCB board itself.

Method to judge the quality of PCB circuit board:

First: distinguish the quality of the circuit board from the appearance

Under normal circumstances, the appearance of the PCB circuit board can be analyzed and judged through three aspects;

1. Standard rules for size and thickness.

The thickness of the circuit board is different from that of the standard circuit board. Customers can measure and check the thickness and specifications of their products.

2. Light and color.

The external circuit board is covered with ink, and the circuit board can play an insulating role. If the color of the board is not bright and there is little ink, the insulation board is not good.

3. The appearance of the weld.

Because there are many parts in the circuit board, if the welding is not good, the circuit board that the parts are easy to fall off will seriously affect the welding quality of the circuit board.

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

1. After the components are installed, the telephone should be easy to use, that is, the electrical connection must meet the requirements;

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

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

4. The copper surface is not easy to oxidize, which affects the installation speed, and it will break soon after oxidation;

5. No additional electromagnetic radiation;

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

7.The high temperature, high humidity and special environment resistance should also be considered;

8. The mechanical properties of the surface should meet the installation requirements;

The above is the way to judge the quality of the PCB circuit board. When buying a PCB circuit board, be sure to keep your eyes open.