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

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

2, dispensing: it is the glue drops to the fixed position of the PCB board, 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 role is to accurately install the surface assembly components to the fixed position of the 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 production line.

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

6. Cleaning: Its role is to remove welding residues such as flux that are harmful to the human body on the assembled PCB. 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, on-line tester (ICT), flying needle tester, automatic Optical inspection (AOI), X-RAY inspection system, function tester, etc. Location According to the need of detection, it can be configured in the appropriate place of the production line.

8, repair: its role is to detect the failure of the PCB board rework. The tools used are soldering iron, repair workstation, etc., which can be configured anywhere in the production line.