With the rapid development of the mobile phone, electronics, and communication industries, PCB circuit boards have also promoted the continuous increase and rapid development of the PCB circuit board industry. People have higher and higher requirements for layers, components, accuracy, data, color, reliability, etc.

However, due to fierce market price competition, the cost of printed circuit board materials is also on the rise. More and more manufacturers are monopolizing the market through low prices to enhance their core competitiveness. However, these ultra-low prices are obtained to reduce the cost of materials and production processes, but the equipment often exhibits simple cracks (fissures), scratches (or scratches), and its accuracy, performance, and other comprehensive factors do not meet the specifications. Seriously affecting the weldability and reliability of the product.

Faced with various printed circuit boards in the market, there are two ways to distinguish the quality of printed circuit boards. One is to judge from the appearance, and the other is to judge from the quality standard requirements of the PCB board itself.

Methods to determine the quality of PCB circuit boards:

First place: Distinguishing the quality of a circuit board from its appearance

Generally speaking, the presentation of PCB circuit boards can be analyzed and judged from three aspects.

1. Specification rules for size and thickness.

The thickness of the circuit board is different from the standard circuit board, and users can measure and inspect it according to their own product thickness and standards.

2. Light and color.

The external circuit board is covered with ink, which can provide insulation. If the color of the circuit board is not bright and there is less ink, the insulation board itself is not good.

3. Weld appearance.

Due to the large number of parts, if the welding is not good and the circuit board falls off easily, it will seriously affect the welding quality of the circuit board. Good appearance, careful identification, and strong interface are very important.

Secondly, the demand for high-quality PCB circuit boards meets the following requirements

1. After installing the components, a telephone should be used, and the electrical connections should meet the requirements;

2. The width, thickness, and spacing of the circuit should meet the requirements to avoid heating, breaking, and short circuiting of the circuit.

3. It's not easy to fall off the copper sheet at high temperatures.

4. Copper surface is not easily oxidized, which affects installation speed. After oxidation, it will be quickly damaged.

5. No additional electromagnetic radiation;

6. The appearance does not deform, avoiding deformation of the shell and misalignment of the screw holes after installation. The current installation is mechanized, and the position and deformation errors of the circuit board and the planning should be within the allowable range;

7. High temperature, high humidity, and special environmental resistance should also be considered.

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

The above are the methods for distinguishing PCB circuit boards. When choosing to purchase a PCB circuit board, be sure to wipe your eyes.

Article source: PCB manufacturerhttp://www.yonghongpcb.com/