Which Aspects Of One-stop PCBA Processing Should Be Paid Attention To To Ensure Quality?
Which aspects of one-stop PCBA processing should be paid attention to to ensure quality?
1. SMT patch
There are two key nodes in the PCBA manufacturing process, which are the systematic quality control details of solder paste printing and reflow temperature control in SMT chip processing. And when printing high-precision circuit boards for special and complex processes, in order to meet high-quality requirements, laser stencils need to be used according to specific conditions. And according to PCB manufacturing requirements and customer product characteristics, some may need to increase U-shaped holes or reduce steel mesh holes.
When performing certain treatments on the stencil production of the PCBA processing technology, the temperature control accuracy of the reflow oven is very important for the wetting of the solder paste and the firmness of the stencil welding, and can be adjusted according to the normal SOP operation guide. In order to minimize the quality defects of PCBA patch prices in the SMT link. In addition, strict implementation of the AOI test can greatly reduce the defects caused by human factors.
Two, DIP plug-in post welding
One of the most important and final processes in the circuit board processing stage is post-dip soldering. In the process of DIP plug-in post-welding, the consideration of the furnace jig for wave soldering is very important. How to use the furnace fixture to greatly increase the yield rate, reduce soldering defects such as continuous tin, little tin, and tin shortage, and according to the different requirements of customers' products, pcba processing plants must continue to summarize experience in practice, and accumulate in experience The process achieves technological upgrading.
Three, test and program firing
The manufacturability report is an evaluation work that we should do before the entire production after receiving the customer's production contract. In the previous DFM report, we can provide some suggestions to the customer before the PCB processing, such as Set up some key test points on the PCB (test point) for the key test of the continuity and connectivity of the circuit after the PCB soldering test and the subsequent PCBA processing. When conditions permit, you can communicate with the customer to provide the back-end program, and then burn the PCBA program into the core master IC through the burner. In this way, the circuit board can be tested more concisely through touch action, so that the integrity of the entire PCBA can be tested and inspected, and defective products can be found in time.
Four, PCBA test
In addition, many customers looking for one-stop PCBA processing services also have requirements for PCBA back-end testing. The content of this kind of test generally includes ICT (circuit test), FCT (function test), burn test (aging test), temperature and humidity test, drop test, etc.
Four points to ensure quality in this one-stop PCBA processing: SMT patch, DIP plug-in post-welding, testing and program firing, and PCBA testing are completely completed in Tecoo. As long as customers leave it to us, there is basically no worries in the follow-up.
