PCB ESD Control Timing: How Long It Takes 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 ESD control timing gives you a practical advantage when…

PCB ESD Control Traceability: Following One Board Modern electronics depend on boards that are assembled correctly the first time. Every product – a phone, a charger, a medical instrument or an industrial controller – relies on thousands of solder joints that must conduct current for years. This article explains PCB…

Paste Jetting: Design Rules and Process Limits Solder paste jetting and stencil printing both put a measured volume of paste onto a pad, and beyond that they have almost nothing in common. Printing transfers paste through a foil that is aligned to the board, so the deposit is defined by…

Board Warpage Measurement Methods for Large PCB Panels Warpage is easy to feel and hard to measure consistently. Two people can check the same panel and reach different conclusions because they used different reference surfaces, different support points or different temperatures. On large thin panels the effect is worse, and…

Reflow Oven Nitrogen Control And Oxygen Concentration Nitrogen in a solder reflow oven is not there to heat the board. It is there to displace oxygen, because oxide formation during the reflow cycle competes directly with the wetting that forms the joint. Whether the gas is worth its cost depends…

Press-Fit: Preparation, Placement and Process Control A press-fit connector is held in the board entirely by mechanical interference, with no solder anywhere in the joint. The pin is deliberately larger than the hole, and a compliant section absorbs the difference by deforming elastically as it is pushed in. The result…

Solder Pot Maintenance and Dross Control A wave solder pot is a small metallurgical plant. It holds several hundred kilograms of molten alloy at a controlled temperature, pumps it through a nozzle, exposes it to air and flux, and is replenished by whatever the operator adds. Everything that happens to…

Solder Pot Alloy Analysis and Contamination Control A solder pot is a chemical reactor that runs for years. Boards pass through it, alloy is added to it and oxide is removed from it, and the composition of the bath drifts away from the specification with every tonne processed. Analysis is…

PCB ESD Control Handover: Passing It On 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 ESD control handover gives you a practical advantage when you…

Press-Fit: Design Rules and Process Limits A press-fit connector is installed by pushing a compliant pin into a plated through-hole that is smaller than the pin. The pin deforms elastically and presses against the barrel wall, and the resulting gas-tight contact carries the signal without any solder. The process looks…