AOI test equipment and PCBA solder paste composition

AOI test equipment and PCBA solder paste composition
Advantages of using AOI detection equipment SMT patch processing
As Surface Mount Technology (SMT) assembly becomes more and more accurate and efficient, manual visual inspection obviously cannot meet the requirements of modern industry. Compared with manual visual inspection, AOI (automatic optical detector) has higher stability, repeatability and higher accuracy, and its products are widely used in electronic manufacturers.
Advantages of AOI in SMT patch processing:
1. Simple programming
AOI usually converts the TXT auxiliary text file automatically generated after the placement machine programming is completed into a file of the required format, from which AOI obtains the five parameters of the position number, part number, X coordinate, Y coordinate, and component rotation direction, and then the system will automatically generate the circuit layout to determine the position parameters and parameters to be tested of each component After completion, fine tune the test parameters of each component according to the process requirements

2. Easy to operate
Since AOI basically uses highly intelligent software, it does not require operators to have rich professional knowledge to operate the placement process.
3. High fault coverage
Due to the use of high-precision optical instruments and highly intelligent test software, ordinary AOI equipment can detect various production defects, and the fault coverage can reach 80%.
4. Reduce production costs
Because AOI can be placed in front of the reflow furnace to check PCB, it can timely find defects caused by various reasons, rather than wait until PCB passes the reflow furnace to check, which greatly reduces the production cost.
AOI inspection equipment can reduce process defects, find and eliminate errors in the early assembly process, and achieve good process control. Early detection of defects will prevent defective boards from being sent to subsequent assembly stages. AOI will reduce maintenance costs and avoid obsolescence. The repaired PCB board appears.
SMT chip processing plants
SMT mounting technology is an important part of PCBA processing technology. Solder paste is one of the important raw materials for patch processing. The following Guangzhou SMT chip processing factory Chen Ri Electronics will introduce the composition of solder paste used for PCBA processing in detail.
Solder paste is a paste or paste evenly mixed with alloy solder powder and solder paste flux. Because the main metal component of most solder pastes is tin, solder pastes are also called solder pastes. Solder paste is an indispensable welding material in wafer processing technology, which is widely used in reflow soldering. The solder paste has a certain viscosity at room temperature, and can initially bond the electronic components to a predetermined position. At the welding temperature, as the solvent and some additives volatilize, the welding parts will be connected with each other to form a permanent connection.
At present, most of the coated solder pastes are printed by SMT die, which has the advantages of simple operation, fast and accurate, and can be used immediately after production But at the same time, there are some shortcomings such as poor reliability of solder joints, which easily lead to faulty soldering, waste of solder paste and high cost