PCB Mechanical Assembly Steps: Screws, Standoffs and Tabs 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 mechanical assembly steps gives you a practical advantage when…

ESD Control on the Electronic Assembly Line Static electricity is generated by movement and it is invisible. A person walking across a floor can accumulate a charge of several thousand volts, and the discharge that follows when a hand approaches a board is fast enough to damage a semiconductor junction…

Thermal Pad Voiding: Causes and Control A thermal pad is soldered like any other joint and judged differently. Instead of a fillet that can be inspected from the side, the connection is a large area under a package, and the quality of the joint is expressed as the proportion of…

Energy Harvesting Circuit Design Guide An energy harvesting circuit takes a source that produces microwatts or milliwatts and turns it into something a sensor node can use. The source is weak, intermittent and has a high internal resistance, so the design is about matching, storing and budgeting rather than about…

Component Lead Coplanarity and Placement Force A component can only be soldered if its leads reach the paste. On a fine pitch part the difference between a lead that touches and one that floats above the deposit is a few tens of microns, and it is a property of the…

PCB Torque Specification: How Tight Is Tight 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 torque specification from the perspective of a PCBA factory floor, covering setting…

Nitrogen Reflow: What the Inert Atmosphere Buys Air is mostly nitrogen, and the oxygen in it is the part that matters to a soldering process. At reflow temperature that oxygen reacts with the metal surfaces and with the solder, forming oxides that resist wetting and that change the way the…

PCB Panel Bow Measurement: Out of Flat by How Much 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…

PCB Plating in the Hole: Getting Copper Inside 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 plating in the hole from the perspective of a PCBA factory…

PCB Smear Removal: Cleaning the Resin 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 smear…