PCB Electroless Copper Thickness: The First Layer Down 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 electroless copper thickness gives you a practical advantage when…

PCB Entry Material Choice: What the Drill Meets First 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 entry material choice from the perspective of a PCBA factory…

Nitrogen in Reflow: Oxygen Level, Wetting and Oven Maintenance Nitrogen in a reflow oven displaces the oxygen that would otherwise oxidise the solder and the pads during the critical seconds when the alloy is molten. It is a real benefit and it is not always worth the cost, and the…

I2C Bus PCB Design and Pull Up Selection The I2C bus is attractive because it needs only two wires and a pair of pull up resistors, and it is used in almost every design that has a sensor, a memory or a small display. Its simplicity hides a set of…

PCB Prepreg Flow Control: Moving Under Pressure 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 prepreg flow control from the perspective of a PCBA factory floor, covering…

PCB Desmear Versus Etchback: Cleaning the Barrel 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 Lamination Pressure Ramp: Squeezing the Stack 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 lamination pressure ramp gives you a practical advantage when you…

Thermal Simulation For Metal Core Board Design A metal core board is chosen when the heat a circuit produces cannot be moved by copper alone. The aluminium base spreads heat far better than a laminate, but the path from the device to that base passes through a thin insulating layer…

Selecting Surface Mount Bridge Rectifiers A bridge rectifier converts alternating current into direct current with four diodes in a single package. The surface mount versions are compact, inexpensive and available in a wide range of ratings, and the differences between them matter more than the headline current figure suggests. Choosing…

Analog Switch and Multiplexer Circuit Design An analogue switch is a pair of MOSFETs that connects or disconnects a signal path, and it behaves quite differently from the mechanical switch it replaces. It has a resistance that varies with the signal, it injects a small charge every time it changes…