Application of Xray nondestructive testing in failure of electronic products

Date：2021-12-08 14:17:12Views：1347

Failure analysis is a new developing subject. The common technical means of failure analysis include appearance inspection, nondestructive testing, thermal analysis, electrical performance testing, dyeing and penetrant testing. It usually simulates and reproduces the failure phenomenon according to the failure mode and phenomenon, finds out the failure cause and finds out the failure mechanism through analysis and verification. It has important practical significance for improving product quality, technology development, process improvement, product maintenance and arbitration of failure accidents. In case of failure, it is necessary to formulate an appropriate NDT plan according to the results of failure analysis, and use NDT equipment to help identify and prevent the continuation of failure, which is a very important process. For fault analysis, NDT equipment can select appropriate testing methods according to different materials, testing positions, components and other requirements.

The main failure modes of electronic components include but are not limited to open circuit, short circuit, burning, explosion, electric leakage, function failure, electrical parameter drift, unstable failure, etc. For hardware engineers, the failure of electronic components is a very troublesome thing. For example, the appearance of a semiconductor device is intact, but in fact it has semi failure or full failure, which will spend a lot of time on hardware circuit debugging, and sometimes even blow up. NDT has a wide range of applications, including power system research institute, power construction company, light water reactor nuclear power station, wind power station, shipbuilding, natural gas pipeline, CNOOC offshore pipeline inspection, PetroChina, Yanchang oil pipeline inspection, pressure vessel inspection, aircraft maintenance, aircraft parts suppliers, military metal products suppliers, steel structure welding inspection 3D printing products, etc., these industries are closely related to nondestructive testing. The development of core technology promotes the development of nondestructive testing equipment.

Why must nondestructive testing be performed? The so-called nondestructive test, that is, non-destructive test, which uses the sound, optical, magnetic and electrical properties of materials to detect whether there are defects or non-uniformity in the tested object without damaging or affecting the performance of the tested object, so as to give the size, location, nature and quantity of defects. Compared with destructive testing, non-destructive testing has the following characteristics:

1. It is non-destructive because it will not damage the performance of the detected object during testing;

2. It is comprehensive, because the detection is non-destructive, so if necessary, 100% of the tested objects can be completely detected, which is impossible for destructive testing;

3. It is the whole process. Destructive testing is usually only applicable to the testing of raw materials, such as tension, compression, bending, etc.

X-ray detection uses the strong penetration of X-ray to detect various defects in materials, which plays a strong guiding role in the cutting and sampling process of complex failure parts; X-ray diffraction technology can analyze and study the crystal from the atomic or ionic level, and accurately measure a variety of residual stresses that may cause component failure; X-ray will ionize the irradiated material, resulting in the unique information of various elements. Various spectrometers with X-ray as the light source can also analyze the types and valence states of chemical elements constituting the analyzed material, which plays an important role in the accurate judgment of failure causes.

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