How many products can the X-ray detector detect?

-ray is one of the five conventional detection methods of radiation, which has been widely used in industry. There is no essential difference between X-ray and natural light. These two kinds of light are electromagnetic waves, but the energy of X-ray quantum is much greater than that of visible light. They have complex physical and chemical interactions with matter and can penetrate visible and invisible objects. It can ionize atoms, make some substances emit fluorescence, and also make some substances undergo photochemical reactions. If the workpiece has a local defect, it will change the attenuation of the object to the light, resulting in the change of transmission intensity. Whether the workpiece has defects, and the location and size of defects can be determined by certain detection methods.

X-rays are extremely short wavelength electromagnetic waves, which are photons. X-rays can penetrate substances that ordinary visible light cannot. Permeability depends on the wavelength of the X-ray, the density and thickness of the penetrating material. The shorter the wavelength of light, the stronger the penetration; The lower the density, the thinner the thickness, and the easier the X-ray penetration.

As X-rays are absorbed by the substance, the molecules that make up the substance are broken down into positive ions and negative ions, which is ionization. The number of ions is proportional to the X-ray absorbed by the substance. According to the ionization degree of air or other substances, the number of X-rays can be calculated.

The basic principle of X-ray imaging is determined by the nature, density and thickness of X-rays. The existing X-ray detection equipment can realize real-time imaging, which greatly improves the detection efficiency.

X-ray inspection technology can be divided into four categories: quality inspection, thickness measurement, article inspection and dynamic research. Quality inspection is widely used in casting, welding process defect detection, industry, lithium batteries, electronic semiconductors and other fields. The thickness gauge can be used for on-line, real-time and non-contact thickness measurement. Cargo inspection can be used for airport, station, customs inspection and structural dimension determination. Dynamics can be used to study dynamic processes such as trajectory, explosion, nuclear technology and casting technology.

X-ray detection will not damage the tested object, which is convenient and practical, and can achieve the unique detection effect that other detection methods can not achieve.

With the discovery, application and development of X-ray, a large number of Xray detection can be seen in various industries. Xray testing equipment is also known as X-ray perspective detector and X-ray nondestructive detector. Xray detector is a test method that uses low-energy X-ray to quickly detect the internal quality of the inspected object and the foreign matters therein, and displays the image of the inspected object through the computer.

What products can Xray test?

SMT, metal casting parts, semiconductor chips, etc. For electronic components, Xray can detect IC chips, PCB printed circuit boards, pcba/smt/bga solder joints, lithium batteries, IGBT semiconductors and led/lcd. For metal casting parts, Xray can carry out Xray internal inspection for hardware castings, welds, cracks, auto parts, pressure vessels, pipelines, etc.

In addition, Xray can also detect the internal cracks and foreign matters of plastic materials and parts, electronic components, LED components, etc., and analyze the internal displacement of BGA, circuit boards, etc; Identify BGA welding defects such as empty welding and false welding, as well as the internal conditions of microelectronic systems and adhesive sealing components, cables, fittings and plastic parts.

There are many products detected by Xray, and the detection principle is the same. Take the detection of voids as an example: when BGA components are welded, voids and voids inevitably occur. The impact of these defects on BGA Solder Joints will reduce the mechanical strength of the solder joints and affect the reliability and life of the solder joints. Therefore, it is necessary to control the occurrence of voids.

In the quality standard of solder joint, the gap plays a decisive role in the quality. Especially in large solder joints, the area of solder joint can reach 25cm ²， It is difficult to control the change of sealing gas in the cavity. The common result is that the size and position of the gap left in the solder are different. In terms of heat transfer, the gap will cause module failure and even damage during normal operation. Therefore, quality control is absolutely necessary in the production process.