What are X-ray?
PCB assembly is one of the important processes in electronic product manufacturing, and surface mounting technology (SMT) is a critical step. SMT involves placing electronic components on a PCB and soldering them, which requires high-precision welding techniques because the components are typically very small. To ensure the quality and reliability of electronic products, X-ray equipment is widely used in SMT.
X-ray equipment is a crucial inspection tool that can penetrate substances and detect their internal structures. In SMT, X-ray equipment is mainly used to inspect the quality and internal structure of solder joints. Solder joints are critical parts that connect electronic components and PCBs. If the quality of solder joints is poor, the electronic components may become loose or fail, which can affect the performance of the entire circuit board.
The working principle of X-ray equipment is based on the penetrating ability of X-rays. X-rays are high-energy electromagnetic waves with strong penetrating power. When X-rays pass through a substance, they interact with the atoms in the substance, producing scattering and absorption. The way these interactions occur depends on the density and thickness of the substance, so the internal structure of the substance can be determined by detecting the absorption and scattering of X-rays.
In SMT, X-ray equipment usually uses two detection methods: transmission and reflection. Transmission involves passing X-rays through the solder joints and electronic components and detecting the intensity and scattering of the rays on the other side. This method can detect the quality of solder joints and the internal structure of electronic components. Reflection involves reflecting X-rays from the surface of the PCB and detecting the intensity and scattering of the reflected rays. This method can detect the interlayer structure and internal connections of the PCB.
The advantages of X-ray equipment are its high precision in detecting the quality and internal structure of solder joints and electronic components, especially for small solder joints and electronic components. In addition, X-ray equipment can quickly scan the entire PCB, greatly improving detection efficiency and accuracy. However, X-ray equipment also has some disadvantages, such as radiation risks and high costs.
Overall, the application of X-ray equipment in PCB assembly is widespread and one of the important processes in electronic product manufacturing. Through the detection of X-ray equipment, the quality and reliability of soldering and electronic components can be ensured, and the quality and performance of electronic products can be improved. With the continuous development of technology, the performance and application range of X-ray equipment are also constantly improving, providing important support for the development of the electronic manufacturing industry.