Copper Contamination in the Solder Pot: Signs and Limits Copper contamination is the slowest and most predictable way for a wave soldering bath to drift out of specification. Copper dissolves into the molten alloy from every plated through-hole, every exposed pad and every tinned lead that passes over the wave,…

Reflow Conveyor Vibration: Where Components Move Conveyor vibration is one of the few reflow variables that leaves no trace in the profile. The thermocouple records the peak temperature, the zones hold their setpoints and the boards come out at the right rate, yet a handful of small parts have moved…

PCB Etch Factor Data: Design and Assembly Considerations Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. Understanding PCB etch factor data gives you a practical advantage when…

Squeegee Speed Control: Aperture Fill and Paste Release Squeegee speed is the rate at which the blade travels across the stencil, and it sets the time each aperture has to fill with solder paste. It is the parameter most often changed to improve a marginal print and the one least…

Contact Printing: Exposure Energy and Registration Accuracy Contact printing forms the resist image by placing a photographic film directly against the resist-coated panel and exposing it through the film. The gap between film and resist is essentially zero, so the image is transferred with the resolution the film and the…

PCB Etch Factor Limits: Where the Edges Are Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB etch factor limits from the perspective of a PCBA factory floor,…

PCB Etch Factor Maintenance: What Matters on the Production Line Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. Understanding PCB etch factor maintenance gives you a practical…

PCB Desmear Problems: What Matters on the Production Line Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. Understanding PCB desmear problems gives you a practical advantage when…

SMT Print Room Humidity: Control for Consistent Paste Printing Solder paste is sensitive to the air around it, and the print room humidity is one of the few variables that affects the paste before it is even printed. A room that is too dry dries the paste in the stencil…

SMT Ionized Air Control: Balance, Decay Time and Emitter Care Ionized air is used on an assembly line to neutralise the static charge that friction and separation put on parts, boards and fixtures. It does not prevent charge being generated, and it does not replace grounding, but it removes the…