How to choose a suitable solder paste in SMT assembly?

inSMTIn surface mount technology (SMT) processingSolder pasteWidely applied inPCBAAssemblyPCBAManufacturing and all kinds ofSMTIn the process, forPCBAThe quality of the finished product plays a decisive role. Solder paste is a kind of soldering material, whose function is to solder various electronic components togetherPCBOn the panel. When faced with various processing techniques, how should one choose a suitable solder paste? Shenzhen JJY Solder Paste Manufacturer offers the following suggestions for your reference:

1, Lead-free&There is lead

The choice between lead-free and leaded solder paste should be based on customer requirements and market demand. With the enhancement of people's environmental awareness, lead-free products are now widely accepted in the market. However, this does not mean that leaded solder paste has no market. Many electronic merchants still use leaded solder paste to save costs. If your product is targeted at the whole world, it would be wiser for you to choose lead-free solder paste.

2, Washing with water and no-wash

Whether to choose water-washed solder paste depends onPCBAThe processing technology after reflow soldering during the processing andPCBIt is determined by the cleanliness of the board.PCBThe tin residue on the panel may melt due to the heat generated by large components during product use, causing a short circuit and reducing the product's service life.

3, The proportion of solder paste alloy components

The proportion of alloys in solder paste determines the melting point of tinSMTThe degree of oxidation on its own surface and the fluidity of the solder paste are directly affected during the processing. When choosing a solder paste with what alloy ratio, you should consider several issues: What alloy ratio of solder paste is suitablePCBAWhat are the welding temperature and operating temperature during the processing? Consider the ductility and adhesiveness of different metal compositions? After considering the above issues carefully, we believe you can choose a solder paste that suits your processing technology. For more solder-related information, you can search for "Shenzhen JJY" to view. We will update the information regularly. If you have any related needs, please feel free to contact us and we will serve you wholeheartedly.