PCBA detailed process

Detailed process of PCBA:

1 Solder paste printing

Unfreeze and stir the solder paste just taken out of the cold storage room, and then accurately leak print it onto the PCB pad through the solder paste printer.

2 Solder paste thickness gauge

Check the printing effect of the solder paste to see if there is tin continuity, less tin and missing printing.

3 Mounting by mounting machine

The mounter can accurately mount components onto PCB pads by absorbing components.

4 Reflow welding

Put the PCB mounted with components into the reflow welding track, pass through the drying area, preheating area, welding area and cooling area, and realize the welding of components.

5 AOI detection

After the PCB is welded, AOI is used to test the welding effect of PCB, and QA spot checks are conducted.

6 DIP plug-in processing

The DIP production line workers simply process the plug-in materials and insert them into the corresponding positions of the boards.

7 Wave soldering

Put the board of the inserted part into the wave soldering, and realize the welding of PCBA board through spraying flux, preheating, wave soldering, cooling and other links.

8 Cleaning after welding

The PCBA board after wave soldering has many defects, which generally requires maintenance and cleaning. After the quality personnel check it correctly, they can move to the next process.

9 Function test

In PCBA function test, ICT, FCT, aging test and program burning are generally required for PCBA board to ensure normal operation of PCBA function and reduce the later repair rate.

10 Finished product assembly

After the PCBA board completes the internal function test, the product shell is composed.

11 Finished product inspection

OQC inspection shall be carried out on the finished products to confirm that there is no error in shipment.