1. With the rapid development of the mobile phone, electronics, and communications industries, there has been continuous growth in the PCB circuit board industry.
2. Customers are increasingly focused on the number of layers, weight, precision, materials, colors, and reliability of components from PCB manufacturers.
3. However, fierce market price competition has led to a rising trend in the cost of PCB materials, with more manufacturers opting for low prices to enhance their core competitiveness.
4. Unfortunately, these ultra-low prices often result from reducing material and manufacturing costs, which can lead to issues such as cracks and scratches.
5. Consequently, the precision and overall performance of these devices frequently fail to meet standards, seriously affecting the solderability and reliability of the final product.
6. In the face of various PCB circuit boards available in the market, there are two main ways to distinguish their quality: by appearance and by the quality specifications of the boards themselves.
7. How to assess the quality of a PCB circuit board:
8. First: evaluate the quality of the circuit board based on its 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 may differ from that of standard circuit boards. Customers should measure and verify the thickness and specifications of their own products.
2. **Light and color.**
The outer surface of circuit boards is coated with ink, providing insulation. If the color of the board is dull and the ink coverage is insufficient, it indicates poor insulation quality.
3. **The appearance of the solder joints.**
A circuit board comprises many components. Poor soldering can lead to components detaching from the board, seriously affecting overall soldering quality. A careful inspection of the appearance is crucial for ensuring strong connections.
**Second: High-quality PCB circuit boards need to meet the following requirements:**
1. The components must be easily operable after installation, ensuring that electrical connections meet specified requirements.
2. The line width, thickness, and spacing must comply with standards to prevent overheating, breakage, or short-circuiting.
3. The copper layer should not detach under high temperatures.
4. The copper surface must resist oxidation, which can hinder installation speed and lead to quick failure.
5. There should be no additional electromagnetic radiation.
6. The shape must remain unchanged to avoid shell deformation and misalignment of screw holes post-installation. With mechanized installations, the positioning of holes and allowable deformation must be within specified limits.
7. The PCB must withstand high temperatures, humidity, and special environmental conditions.
8. The mechanical properties of the surface must meet installation requirements.
The above guidelines summarize how to assess the quality of PCB circuit boards, as outlined by PCB manufacturers. When purchasing PCB circuit boards, it’s essential to remain vigilant.
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