SMT adhesive standard process

The standard process for SMT adhesive production is: Printing → (dispensing) → mounting.

1. Printing: Its function is to print solder paste or SMT adhesive on the pad of PCB circuit board to prepare for soldering of components. The equipment used is a screen printing machine, which is located at the forefront of the SMT process line.

2. Dispensing: it is to put the SMT adhesive to the fixed position of the PCB, its main function is to fix the components to the PCB. The equipment used is a dispenser located at the forefront of the SMT line or behind the inspection equipment.

3. Mounting: Its function is to accurately mount the surface-assembled components to the fixed position of the PCB. The equipment used is a surface mounting machine located behind the screen printing machine in the SMT production line.

4. Curing: The function is to melt the SMT adhesive so that the surface-assembled components and the PCB board are firmly bonded together. The equipment used is a curing oven located behind the surface mounting machine in the SMT line.

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

6. Cleaning: The function is to remove the soldering residue (such as flux) which is harmful to the human body on the assembled PCB board. The equipment used is a cleaning machine, position is not fixed.

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

8. Repair: its role is to rework PCB boards that detect faults. The tools used are mainly heat guns, soldering irons, rework stations and so on. Configure anywhere in the production line.