Components
The type, model, nominal value, and polarity of components must fully comply with the product assembly drawing and bill of materials.
Placement position
During placement, component terminations or leads must be aligned or centered correctly, the solder ends must make accurate contact with the solder paste pattern, and the placement position on the board must be precise.
Placement pressure
Pressure must be properly controlled during SMT placement. If the pressure is too low, the solder paste may not hold the component firmly, causing position shift during reflow soldering. If the pressure is too high, it may cause solder paste bridging or smearing.
PCB board
The PCB serves as the base substrate for SMT assembly, and its quality directly affects the overall SMT process quality.
Reflow temperature profile
When the PCB, components, and solder paste printing are all normal, the key factor determining whether the product is qualified is the reflow temperature profile setting.
Equipment
Proper tools are essential for quality work. SMT placement relies on production equipment and its performance, so equipment is a necessary means for large-scale and refined SMT production. For non-standard conveyor rails, heating module brackets, or other custom mechanical parts used in such equipment, Hansheng Automation provides precision machining based on customer specifications.
Stencil
Stencil thickness and aperture design directly influence SMT assembly quality. Stencils are inherently non-standard, and for custom stencil frames or precision-machined stencil fixtures, Hansheng Automation can manufacture according to customer drawings and required tolerances.
SMT assembly supplier
Selecting a qualified SMT assembly provider helps ensure processing quality. Differences in SMT process capability can directly affect equipment utilization, first-pass yield, and final product yield.
