SMT technology is used to process PCB. The biggest difference between PCB and PCB is whether there are welded electronic components.
PCB=empty board, PCBA=assembled circuit board
The electronic components are welded on the circuit board through SMT (Surface Mount Technology) technology.
Only the circuit board with electronic components welded can have a channel to let electronic signals flow. The SMT production line is a streamlined production line, and each step must be completed before entering the next process.
Next, we will introduce the basic manufacturing process of SMT production line.
Basic manufacturing process of SMT production line
Step 1: Automatic loading machine
It can meet the needs of fully automatic feeding of PCB bare boards and semi-finished products, and it can also adjust the width of the equipment track according to the width of the PCB.
Step 2: Printing solder paste
Solder paste is printed on the PCB board through steel plate. Solder paste is an important raw material for welding electronic components.
Step 3: Fast printing machine/universal printing machine
The fast printing machine can quickly weld electronic parts on the circuit board, and the SMT production line will have 1-4 fast printing machines.
Universal printers do the same job, but they do not pursue speed but study the accuracy of the stamping.
Step 4: Visual inspection
Manual visual inspection shall be conducted to ensure the correct printing. To enter the oven for welding.
Step 5: Backwelding
The most important manufacturing process is to melt solder paste to form a intermetallic compound by heating, and weld electronic components and circuit boards together. This machine is also known as an oven.
Step 6: Automatic caching machine
Realize lean production of SMT process automation and adapt to the temporary storage of PCB boards.
Multiple sports modes: sending board mode, first in first out, last in first out, NGOK receiving board and straight through.
Step 7: AOL (optical detection)
AOL optical inspection is used to quickly check the welding status and pick out the defective finished products.
Step 8: Visual inspection
Check the finished products again by manual visual inspection to avoid AOL’s misjudgment.
Final words
Our PCB & PCBA services also specialize in prototyping and small-volume production, making IBE the one-stop destination of boards fabrication and assembly. This arrangement makes your R&D work easy and time-saving. Our professional engineers and technicians will work closely with you through our customer service people to ensure the best quality and quickest possible lead time. We have established us as the leading supplier of PCB and PCBA services for our consistent quality and excellent services.
IBE PCBA capabilities: SMT Assembly, BGA Assembly, Through-Hole Assembly, Mixed Assembly, Rigid Flex PCB Assembly Services. Compliant with a wide range of standards including IPC 610 Class 2 and Class 3.
IBE PCBA service provides printed circuit board manufacture, components procurement, and assembly under one roof. This video shows how it’s done and our PCBA facility.
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