SMT production process(9)

1. Silk screen printing: Its function is to leak solder paste or patch glue onto the pads of the PCB to prepare for the soldering of components. The equipment used is a screen printing machine (screen printing machine), which is located at the forefront of the SMT production line.

2. Glue dispensing: It is to drop glue onto the fixed position of the PCB, and its main function is to fix the components on the PCB. The equipment used is a glue dispenser, which is located at the forefront of the SMT production line or behind the testing equipment.

3. Mounting: Its function is to accurately install the surface mount components to 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 adhesive, 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, which is located behind the placement machine in the SMT production line.

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

7. Inspection: Its function is to inspect the welding quality and assembly quality of the assembled PCB board. The equipment used is a magnifying glass, a microscope, an online tester (ICT), a flying probe tester, and an automatic optical inspection.

8. (AOI), X-RAY detection system, function tester, etc. The location can be configured in a suitable place on the production line according to the needs of detection.

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