SMT basic process elements include: screen printing (or dispensing), mounting (curing), reflow soldering, cleaning, testing, repair.

1. Screen printing: Its function is to leak solder paste or patch glue onto the PCB pad to prepare for the welding of components. The equipment used is screen printing machine (screen printing machine), located at the front end of the SMT line. 

2, dispensing: it is to drop the glue to the fixed position of PCB, its main role is to fix the components to the PCB board. The equipment used is the dispensing machine, which is located at the front end of the SMT production line or behind the testing equipment.

3. Mounting: Its function is to accurately install the surface assembly components to the fixed position of PCB. The equipment used is the SMT machine, which is located behind the screen printing machine in the SMT production line.

4, curing: its role is to melt the patch glue, so that the surface assembly components and PCB board firmly bonded together. The equipment used is the curing furnace, which is located behind the SMT machine in the SMT line.

5, reflow welding: its role is to melt the welding paste, so that the surface assembly components and PCB board firmly bonded together. The equipment used is reflow furnace, which is located behind the SMT machine in the SMT line.

6, cleaning: its role is to assemble the PCB board above the welding residue harmful to human health, such as flux, etc., to remove. The equipment used is a cleaning machine, the position can not be fixed, can be online or not online.

7, detection: its role is to assemble the PCB board welding quality and assembly quality detection. The equipment used includes magnifying glass, microscope, online tester (ICT), flying needle tester, automatic optical testing (AOI), X-RAY testing system, function tester, etc. Location According to the need of detection, can be configured in the production line of the appropriate place.

8, repair: its role is to detect the fault of the PCB board rework. The tools used are soldering iron, repair workstation, etc. Configuration anywhere in the production line.