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Xing Hongtai introduces high temperature storage test of solder wire

2019-12-25 15:38:34 Sources: Shenzhen Xinghongtai Tin Industry Co., Ltd. 853

The high temperature storage of solder wire is mainly used to examine the effect of temperature and time on the reliability of resin solder wire under storage conditions. For solder joints, high temperature storage is often encountered in the use environment. The impact of high temperature on solder joints mainly reflects the growth of intermetallic compounds at the interface of solder joints. At the same time as intermetallic compounds grow thick, Kirkendall may also be Voids, the strength of the solder joints of the solder product will decrease. This means that high temperature stress can cause solder joint aging or early failure. This accelerated aging process can be described by a Class A law.

 
At present, there is no test standard specifically for the high temperature test of solder wire solder joints. For the selection of general solder joint high temperature test conditions, refer to JEDEC's standard JESD22-A103C-2004. The level of high temperature stress can be divided into 7 levels for AG. In terms of solder joints, conditions A or G are generally selected because other temperature conditions may cause other new degradation failure mechanisms, such as exceeding the Tg of the PCB substrate, which will cause severe deformation of the PCB, which will cause new stress on the solder joints. , Will inevitably lead to the creation of new mechanisms. In addition, some solder joints can cause similar problems.

In addition, because the high temperature stress is single and limited by the surrounding factors, the test time is generally longer, which is more than 1000h. It is best to have testing equipment for testing in order to detect failed samples early. You can also use a scanning electron microscope to check the growth or speed of Kirkendall voids after sectioning to achieve a preliminary assessment of solder joint reliability.

Shenzhen Xinghongtai Tin Industry Co., Ltd. is a professional solder wire manufacturer.It has been focusing on the development and production of solder wires for 12 years.It provides solder wires, leaded solder wires, solder wires, solder bars and solder wires of different specifications.