How to judge the quality of pcb circuit board

With the rapid development of mobile phones, electronics, communications and other industries, the PCB circuit board industry has also continued to grow rapidly. People have increasingly higher requirements for the number of layers, weight, precision, materials, colors and number of layers. reliability. Due to fierce market price competition, the cost of board materials is also rising. More and more manufacturers are monopolizing the market at low prices to improve their core competitiveness. However, the reason behind these ultra-low prices is the reduced cost of materials and process manufacturing. Equipment is usually prone to cracks (cracking), scratches (or scratches), and its comprehensive factors (such as accuracy and performance) do not meet standards, seriously affecting the solderability and reliability of the product.

So, how to judge the quality of circuit boards? You can refer to the following points

1. Size and thickness standard rules: The thickness of the circuit board is different from the thickness of the standard circuit board. Customers can measure and inspect according to thickness and specifications.

2. Light color: The external circuit board is covered with ink, and the circuit board can be used as an insulation layer. If the color of the board is not bright and less ink is used, the insulation board is not good.

3. Welding appearance: Since there are many parts on the circuit board, if the welding is poor and the parts are easy to fall off, it will seriously affect the welding quality of the circuit board. It’s important to have a good look, identify it carefully and have a strong interface.

High-quality PCB circuit boards need to meet the following requirements

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

2. High-temperature copper skin is not easy to fall off

3. The copper surface is not easily oxidized

4. No additional electromagnetic radiation

5. The shape should be without deformation, and the hole position of the circuit board and the deformation error between the circuit and the design should be within the allowable range

6. High temperature, high humidity and special environmental tolerance should be considered

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