PCB circuit board multifarious how to distinguish good from bad?

With the rapid development of mobile phone, electronics, communication industry, but also promote the PCB circuit board industry continues to expand and rapid growth, people for the components of the layer, weight, precision, materials, color, reliability and other requirements are increasingly high.

However, due to the fierce price competition in the market, the cost of PCB board materials is also on the rise. In order to improve the core competitiveness, more and more manufacturers monopolize the market with low prices. However, behind these ultra-low prices, is to reduce the cost of materials and production costs to obtain, but the device is usually prone to cracks (cracks), easy scratches, (or bruises), its precision, performance and other comprehensive factors are not up to standard, seriously affecting the use of products on the weldability and reliability and so on.

In the face of various PCB circuit boards on the market, distinguish PCB circuit boards good or bad can start from two aspects; The first method is to judge from the appearance, on the other hand is to judge from the quality specification of PCB board itself.

The method of judging the quality of PCB circuit board:

First: Distinguish from the appearance of the circuit board is good or bad

In general, the appearance of PCB circuit boards can be analyzed and judged through three aspects;

1. Standard rules for size and thickness.

The thickness of the circuit board to the standard circuit board is different sizes, customers can measure and check according to their own product thickness and specifications.

2. Light and color.

External circuit boards are covered with ink, circuit boards can play the role of insulation, if the color of the board is not bright, less ink, insulation board itself is not good.

3. Appearance of weld.

Due to more parts of the circuit board, if the welding is not good, parts easy to fall off the circuit board, seriously affect the welding quality of the circuit board, good appearance, careful identification, the interface is very important.

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

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

2, line width, line thickness, line distance meet the requirements, so as to avoid line heating, open circuit, and short circuit;

3, by high temperature copper is not easy to fall off;

4, the surface of copper is not easy to oxidize, affect the installation speed, oxidation after use soon after bad;

5. No additional electromagnetic radiation;

6. The shape is not deformed, so as to avoid the deformation of the shell and dislocation of the screw hole after installation. Now are mechanized installation, circuit board hole location and line and design deformation error should be within the allowable range;

7, and high temperature, high humidity and special environment should also be considered in the range;

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

The above is the PCB circuit board judge good or bad method, in the purchase of PCB circuit boards, we must polish our eyes.