SMT processing SMT is also called surface assembly technology or surface paste technology. It is the abbreviation of the Surface Mountain Technology and a popular processing technology in the electronic processing industry. SMT patch processing is processed on the basis of the PCB line board, and the components are installed on the PCB. The following one -brief introduction of the common production steps for SMT patch processing will be briefly introduced.
1. Ten paste printing: This link is usually in the front of the patch processing production line. The main function is to printed the leakage of the welded paste or patch glue to the pad of the PCB through the steel mesh to prepare the welding of the component.
2. Plastic point: The main content of the point -to -point operation is to drop glue to the fixed position of PCB. The main role is to fix the component to the PCB board.
3. Patch: The role of the patch link in the SMT patch processing is to accurately install the surface assembly device to the fixed position of the PCB. The equipment used is a patch machine, which is generally distinguished according to the speed and accuracy of the patch.
4. CICS: The main role is to melt the patch glue, so that the surface assembly component is firmly glued with the PCB board.
5. Reflux welding: The main role of reflux welding is to melt the welding paste so that the surface assembly components are firmly bonded with the PCB board, and the return welding process in SMT patch is directly related to the welding quality of the circuit board. The temperature curve is also one of the important parameters of SMT processing.
6. Cleaning: Its function is to remove the harmful welding residue on the human body on the assembled PCB board.
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