Aging refers to applying environmental stress to the product by high temperature method, while environmental stress screening includes not only high temperature stress, but also many other stresses, such as temperature cycling, random vibration and so on.
Why must electronic products be subject to 100% aging test before leaving the factory;
Because in the processing process of electronic products, various defects will be introduced due to the complex processing and the large use of components and materials (even the best designed products). Whether processing defects or component defects, they can be divided into obvious defects and potential defects. Obvious defects refer to those defects that cause the product to fail to work normally, such as short circuit / open circuit. However, potential defects make the product temporarily usable, but the defects will soon be exposed during use, and the product will not work normally. For example, the product is not enough solder. Although the product can be used, slight vibration may cause open circuit of the solder joint. Obvious defects can be inspected by conventional inspection means (i.e. ict: on-line test, in circuit test), which is a standard test means to inspect production defects and defective components by testing the electrical performance and electrical connection of on-line components (components on the board). It mainly checks the on-line single component and the open and short circuit of each circuit network. It has the characteristics of simple operation, fast and fast, accurate fault location, FT, etc.) to find out. Potential defects can not be found by conventional inspection methods, but eliminated by aging methods. If the effect of aging method is not good, the potential defects that have not been eliminated will show up in the form of early failure (or failure) during the operation of Zui products, resulting in an increase in product repair rate and maintenance cost.
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