Technical Article: Xeusheng Electronics teaches you to distinguish the good and bad PCB

PCB has been known as the "mother of electronic products" reputation, almost all electronic products are inseparable from PCB. The large demand determines the wide supply, but more and more manufacturers in order to enhance the core competitiveness, to monopolize the market with low prices. However, behind these ultra-low prices, is to reduce the cost of materials and production process to obtain, but the device is usually prone to cracks (cracks), easy to scratch, its precision, performance and other comprehensive factors do not meet the standards, seriously affecting the use of products in the solderability and reliability, etc.

In the face of a wide variety of PCB boards on the market, Xusheng Electronics teaches you from two aspects to identify the quality of PCB boards:

One: distinguish the stand or fall of the circuit board from the appearance

In general, PCB circuit board appearance can be analyzed and judged from three aspects;

1. Standard rules for size and thickness.

The thickness of the circuit board on the standard circuit board is different in size and can be measured & checked according to the thickness and specifications of their products.

2. Light and color.

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

3. Weld appearance.

Due to there are many parts on PCB, if the welding is not good, the parts are easy to fall off the circuit board, seriously affect the welding quality of the circuit board, good appearance, strong interface is very important.

Two: high quality PCB circuit board needs to meet the following requirements

1, Electrical connection to meet the requirements;

2, Line width, line thickness, line distance to meet the requirements, in order to avoid line heating, circuit break and short circuit;

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

4, Copper surface is not easy to oxidize, affect the installation speed, after the oxidation of the service life is short;

5, No additional electromagnetic radiation;

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

7, High temperature, high humidity and special environment should also be taken into consideration;

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

The above is Xusheng Electronics teaches you the method to distinguish the good and bad PCB, in the purchase of PCB circuit board, you can operate in accordance with this method. Xusheng electronic scale has the world's leading industry (annual production capacity of 13.5 million ㎡), the world's longest intelligent production line (460 m), Xusheng electronic PCB production in strict accordance with the "fast, high quality, protect" (i.e., delivery fast, cost-effective, industry leading quality and after-sale guarantee) standards, fully meet customer needs, dedicated to provide customers with more than expected product value, realize the industry leading price.