How much do you know about the common classifications of solder paste in SMT assembly?

SMTMany kinds of production raw materials are used in surface mount technology (SMT) processing.Solder pasteOne of the more important ones is that the quality of the solder paste will also have a direct impactSMTThe soldering quality of surface mount technology (SMT) processing, and different types of solder paste also need to be selected for different production processes and products. Below, JJY Solder Paste Manufacturer will briefly introduce the common classifications of solder pastes to you:

I. Classification by solder paste ingredients

1Leaded solder paste: It contains lead and poses a significant threat to the environment and human health. However, it has a good soldering effect and a low cost, and can be applied to some electronic products that have no environmental protection requirements.

2Lead-free solder paste: It is environmentally friendly in composition and has low harm. It is applied in eco-friendly electronic products. With the increasing national environmental protection requirements, lead-free technology is becoming more and more advancedsmtThe processing industry will become a trend.

Ii. Classification by the melting point of solder paste

Generally speaking, the melting points of solder paste can be classified into three types: high temperature, medium temperature and low temperature.

The commonly used high temperature isSn-Ag-Cu 305,0307; There is at medium temperatureSn-Bi-Ag; Low temperature is commonly usedSn-Bi. inSMTIn surface mount technology (SMT) processing, the selection should be based on different product characteristics.

Iii. Classification by the fineness of tin powder

According to the particle diameter of tin powder, solder paste can be classified into1,2,3,4,5,6Grade number powder, among which3,4,5The most commonly used ones are the number of followers. The more precise the product is, the smaller the tin powder needs to be selected. However, the smaller the tin powder, the larger the oxidation area of the tin powder will be. In addition, round tin powder helps to improve the printing quality.

3Number powder: The price is relatively low and it is commonly used in large quantitiessmtIn terms of craftsmanship

4Powder: Commonly used for tight-fitting feetIC,smtChip processing

5Powder: Commonly used in very precise welded components, mobile phones, tablets and other products with high requirements;

smtThe higher the difficulty of the product in surface mount technology (SMT) processing, the more important the selection of solder paste becomes. Choosing the appropriate solder paste for each product can help improve the qualitysmtThe process of surface mount technology (SMT) processing.

Shenzhen JJY Industrial Technology Co., Ltd. mainly produces and operates: lead-free solder paste, lead-free high-temperature solder paste, lead-free medium-temperature solder paste, lead-free low-temperature solder paste, etc. If you have any needs, please feel free to contact us.