DBC Substrate: Direct Bonded Copper for Power Modules When Metal Core and FR-4 Both Run Out Power density in modern converters has risen to the point where the two familiar answers stop working. FR-4 insulates well but conducts heat at a few tenths of a watt per metre kelvin, and…

Immersion Silver PCB: Flat Pads, Lead Free and What It Costs A Finish Chosen for Flatness Surface finish is the part of the board specification that gets the least attention and causes a surprising share of assembly problems. It has three jobs: keep the copper solderable until the board is…

PCB Hidden Solder Ball Under BGA: A Factory-Floor Review 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 hidden solder ball under BGA from the perspective of a…

PCB Head in Pillow Defect: Practical Process Controls 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 head in pillow defect gives you a practical advantage…

Imaging System PCB: Design for Sensors, Bandwidth and Noise The Board Behind Every Image An imaging product is judged by the picture it produces, and the picture is limited by the board that carries the sensor. Between the pixel array and the processed output sits a circuit that has to…

PCB Solder Beading Cause: Small Balls Beside the Joint 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…

Military PCB Assembly: Standards, Materials and Testing Assembled for Conditions That Do Not Forgive A commercial board is designed around a use case. A military board is designed around a set of conditions: temperature extremes, sustained vibration, humidity, salt, shock and electromagnetic interference, often all present at once, in equipment…

PCB Microball Shadow Effect: Design, Process, and Quality Notes 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 microball shadow effect from the perspective of a PCBA factory…

Teflon PCB: PTFE Materials for RF and High Speed Designs Where FR-4 Stops Working Every material choice in electronics is a compromise, and FR-4 is the compromise that suits the most designs. It is cheap, easy to process, mechanically sound and electrically adequate below a few gigahertz. Push a design…

PCB Tombstone Defect Cause: When a Part Stands Up 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 tombstone defect cause gives you a practical advantage…