We use cookies to improve your online experience. By continuing browsing this website, we assume you agree our use of cookies.

Industry News

Solder paste quality inspection steps

Views : 130
Update time : 2022-09-08 09:44:49
1. For solder powder detection, the particle size of tin powder can be measured with a high magnification microscope to check the distribution of tin powder particles. It is relatively high, which proves that the quality of this solder paste solder powder is relatively good, and it will not affect the quality of SMD printing on the stencil.
2. Use atomic absorption spectrometer to measure the chemical elements in the solder paste. Usually the detection items are the content of harmful metal elements such as lead, mercury and cadmium. If the solder paste is a halogen-free solder paste, it is also necessary to check the halogen in the solder paste in advance. Does the content meet the standard?
3. In the viscosity test, the viscosity of the solder paste will greatly affect the printability of the solder paste on the screen. If the viscosity of a solder paste is large, the slump performance will be greatly improved, but the printability will be poor. It may affect the release effect, and the solder paste may stick to the stainless steel mesh, resulting in poor printing.
4. Stencil printability test, the use of smt stencil to print solder paste is an indispensable step in the patch welding process, so it is essential for a solder paste to have good printability, so the IQ C department can Take a small amount of solder paste and perform a printability test to verify that the stencil printability of this solder paste is good.
5. Test the solderability of the solder hook. The sweatability of the solder paste can be divided into wettability and solderability. This function is mainly to test whether the solder paste will dry out. If it does not dry out, the connection strength after soldering meets the requirements. requirements? This step of checking whether it is good or bad can be tested using discarded circuit boards and electronic components that have been disassembled.
6. Whether the solder joints are full and shiny, this detection step can be done by pasting the solder paste on the glass and reflow soldering. After the soldering is completed, it can be observed with the naked eye to see whether the solder joints are shiny. It can also be seen from the glass whether there is a lot of residue after solder paste soldering?
Through the above steps, we can basically judge the quality of a solder paste intuitively or from data, whether the solder paste is lead, lead-free or silver-containing, an experienced electronics factory can pass each The data of each test is summarized and organized into a table, and the quality of the solder paste is verified by analyzing the results of each test.
Related News
Read More >>
High Purity Tin Ingot: Crucial Applications and Benefits High Purity Tin Ingot: Crucial Applications and Benefits
May .14.2024
High purity tin ingots are indispensable in various industries, offering exceptional quality and performance.
Pure Tin Ingot: Essential Material for Diverse Industrial Applications Pure Tin Ingot: Essential Material for Diverse Industrial Applications
May .10.2024
Pure tin ingots are indispensable raw materials utilized in various industrial sectors for their unique properties and versatile applications.
Unlocking the Potential of Pure Tin Bars: Essential Components for Diverse Industries Unlocking the Potential of Pure Tin Bars: Essential Components for Diverse Industries
May .06.2024
Pure tin bars, renowned for their exceptional purity and versatility, serve as fundamental building blocks across a spectrum of industries, from electronics to metallurgy.
Lead Bar for Sale: Uses, Specifications, and Buying Considerations Lead Bar for Sale: Uses, Specifications, and Buying Considerations
Apr .30.2024
Lead bars are essential industrial materials with diverse applications across various sectors. In this article, we explore the uses, specifications, and important considerations when purchasing lead bars for sale.
pop_close
pop_main
Leave us your e-mail address and we'll give you a free consultation.
1. Price reference LME, more favorable 2.Transportation is safer and more reliable with CRF.