The basic process components of SMT include: screen printing (or dispensing), placement (curing), reflow soldering, cleaning, testing, rework

1. Silkscreen: Use laser stencil to leak solder paste or patch glue onto the pads of the PCB to prepare for the welding of components. The equipment used is screen printing machine (screen printing machine), SMT patch stencil, which is located at the front end of the SMT production line.

2. Dispensing: it drips glue onto the fixed position of the PCB board, and its main function is to fix the components to the PCB board. The equipment used is a glue dispenser, which is located at the front end of the SMT production line or behind the inspection equipment.

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

4. Curing: Its function is to melt the patch glue, so that the surface mount components and the PCB board are firmly bonded together. The equipment used is a curing oven, which is located behind the placement machine in the SMT production line.

5. Reflow soldering: its function is to melt the solder paste, so that the surface mount components and the PCB board are firmly bonded together. The equipment used is a reflow oven, located behind the placement machine in the SMT production line.

6. Cleaning: Its function is to remove the welding residues such as flux that are harmful to the human body on the assembled PCB board. The equipment used is a washing machine, the location may not be fixed, it may be online or not.

7. Inspection: Its function is to inspect the welding quality and assembly quality of the assembled PCB board. The equipment used includes magnifying glass, microscope, in-line tester (ICT), flying probe tester, automatic optical inspection (AOI), X-RAY inspection system, functional tester, etc. The location can be configured in a suitable place on the production line according to the needs of the inspection.

8. Rework: Its function is to rework the PCB board that has detected the failure. The tools used are soldering iron, rework station, etc. Configured anywhere in the production line.