SMT Processes

March 21, 2024

Processes	Details	Pics
Step 1: Preparation	1. Generate SMT coordinate file according to Gerber file & BOM List 2. SMT programme 3. Prepare components 4. Arrange well inspection personnel for IPQC
Step 2: Laser Steel Mesh	Laser steel mesh in line with pad layer. make hollow-out position of the steel mesh consistent with pads on the PCB, so that solder paste covers accurately the pads.
Step 3: Solder Paste Printing	Cover the pads with solder paste
Step 4: 3D SPI Solder Paste Detection	With the help of optical image technique to detect the condition of solder paste, such as offset, proportion, height, short circuit, etc. It aims to screen poor printing PCB in time.
Step 5: SMT	To place components on PCB with the help of Sm471 plus high-speed SMT machine & Sm481 PLUS multifunctional SMT machine
Step 6: Reflow Soldering	To fix components on PCB
Step 7: AOI Detection	To inspect whether the appearance & welding spot of the components meet requirement.

Processes