Cleaning Chemistry Compatibility Testing A cleaning process has to remove flux residue without damaging anything else on the board, and the list of things that can be damaged is longer than most process engineers expect. Labels peel, connector housings craze, relay seals take on water, laser markings fade, and a…

Press-Fit Connectors: Hole Tolerance and Barrel Plating A press-fit joint is made without solder, and that is precisely why it demands more of the board than a soldered joint does. The connection depends on the hole wall deforming against the pin and staying in contact for the life of the…

Solder Joint Inspection Under Low-Angle Light Solder is a mirror. What an inspector sees on a joint is mostly the reflection of whatever light is aimed at it, which is why the same joint can look perfect under one lamp and defective under another. Low-angle light, directed across the board…

PCB Cleanroom Environment: Where It Happens 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 cleanroom environment gives you a practical advantage when you choose a…

PCB Cleanroom Improvement: Getting Better Each Lot 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 cleanroom improvement from the perspective of a PCBA factory floor, covering improving…

PCB Cleanroom Traceability: Following One Board 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 cleanroom traceability from the perspective of a PCBA factory floor, covering tracing cleanroom…

PCB ESD Control Limits: Where the Edges Are 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 limits gives you a practical advantage when…

PCB Cleanroom Timing: How Long It Takes 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…

PCB ESD Control Maintenance: Keeping It Working 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 ESD control maintenance from the perspective of a PCBA factory floor, covering…

Solder Pot: Design Rules and Process Limits A solder pot is a chemical reactor that nobody designed as one. Every board adds copper, every lead adds its plating, and the alloy that started the shift inside specification drifts towards a composition that no longer wets the way the profile assumes.…