Ten common problems in SMT patch production and processing

1. Generally speaking, the SMT processing workshop requires a temperature of 25±3°C;

2. When printing solder paste, the required materials and special tools are solder paste, thick steel plate, scraper, wiper, dust-free cloth, cleaning agent, and mixing knife;

3. The common solder paste alloy composition is Sn/Pb aluminum alloy ratio is 63/37;

4. The main components of solder paste are divided into two categories: tin powder and solder paste.

5. The important role of solder paste in electric welding is to remove metal oxides, destroy the interfacial tension of molten tin, and avoid oxidation in air.

6. The volume ratio of tin powder particles to solder paste Flux (solder paste) is about 1:1, and the weight is about 9:1;

7. Warehouse materials take the principle of first-in first-out method;

8. When opening, the solder paste needs to go through two extremely important whole processes of heating and stirring;

9. The common production methods of steel plates are: etching, laser, electroforming and other production methods;

10. The full name of SMT is Surfacemount (or mounting) technology, and Chinese refers to surface mount technology;