PCB X-ray CT Scanning: Looking Inside a 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 explains…

Black Oil-Resistant PCB: Materials, Coatings and Applications A black oil-resistant PCB is a board whose solder mask has been selected and processed to survive contact with oils, fuels and lubricants while maintaining electrical performance. The colour is a consequence of the pigment system, and the resistance comes from the resin…

Fast PCB Fabrication: How Express Turnaround Actually Works Fast PCB fabrication is often described as a service level, but it is really a set of decisions about data readiness, process standardization and queue position. Understanding which of those three is binding explains why an order can be completed in twenty-four…

Overmolding for Flexible Circuits: A Practical Guide Overmolding seals a flexible circuit inside a molded polymer body. It is used on cables, medical leads, sensor assemblies and handheld products where the circuit must be protected from moisture, mechanical abuse and handling, and where a separate enclosure would be too bulky…

Camera Module PCB Design: Layout for Image Sensors A camera module packs an image sensor, a lens, a clock source and a high-speed serial interface into a space measured in millimetres. The board is small, dense and electrically sensitive, and it usually sits on the end of a flexible interconnect…

How to Arrange Layers in a Rigid-Flex PCB Stackup A rigid-flex board is built by laminating flexible polyimide layers into rigid sections, and the stackup is what makes that possible or impossible. Unlike a conventional board, the layer arrangement has to satisfy two different sets of mechanical conditions at once:…

PCB Tab Routing on A Panel: The Bridges That Hold the Board 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 tab routing on a panel…

Single-Sided PCB Manufacturing: A Complete Guide A single-sided board carries its copper pattern on one face only, which sounds like a limitation and is in fact the reason it survives. It is the cheapest board that can be fabricated, the fastest to turn around and the easiest to inspect, and…

PCB Solder Ball Rework: Bringing a BGA Back 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 solder ball rework from the perspective of a PCBA factory floor,…

Thermostat PCB Design: Sensors, Switching and Isolation A thermostat is a small, unglamorous product that hides a surprising amount of design discipline. It combines a sensor with low-level analog signal conditioning, a switching output that may control mains voltage, and a user interface, all inside a housing that is often…