How an Overlooked Capacitor Solved Multiple EMC Failures
Case studies of radiated, conducted, surge, and ESD failures fixed by capacitor placement and value—covering decoupling distance, self-resonance, X/Y capacitors, and TVS pairing.
PCB Knowledge
Printed circuit boards (PCBs) form the backbone of modern electronics, enabling everything from smartphones to industrial machinery. In our PCB Knowledge category, we delve into the essential principles, techniques, and innovations that drive this field forward. Whether you are an engineer refining your designs or a hobbyist embarking on your first project, this collection offers valuable resources to enhance your understanding and skills. The scope of PCB Knowledge spans foundational concepts such as circuit layout and component selection, extending to advanced topics like high-speed signal integrity and thermal management. We provide detailed guides that walk through design software usage, manufacturing processes, and quality assurance methods. Tutorials offer hands-on instructions for prototyping and assembly, while insights from industry experts share real-world case studies and emerging trends. Best practices emphasize reliability, cost efficiency, and compliance with standards like IPC, ensuring your projects meet professional benchmarks. The practical value lies in its direct applicability to everyday challenges. For instance, articles on troubleshooting common PCB failures can save time and resources in product development cycles. Discussions on materials science reveal how choices in substrates and coatings impact performance in harsh environments, such as automotive or aerospace applications. By addressing these elements, PCB Knowledge equips you with tools to innovate and optimize electronic systems that power renewable energy solutions, medical devices, and consumer gadgets. As you read through the articles here, you will gain a comprehensive perspective that connects theoretical knowledge with tangible outcomes. This category serves as a hub for ongoing learning, where each piece builds on the others to foster expertise in PCB technology. Stay informed on the latest advancements, from flexible PCBs to sustainable manufacturing, and apply these insights to your work for superior results.
PCB Design Keep Going Wrong? 13 Key Fundamentals That Build a Solid Baseline
Thirteen PCB fundamentals covering FR-4, impedance, surface finish, stackup, SI, vias, test points, and fiducials, from layout through manufacturability.
Can a 0 Ω Resistor Really Be Used as a Jumper? A Trap Many Engineers Have Hit
A 0 Ω resistor is not an ideal short. Rated current, 20–50 mΩ resistance, and 0.5–2 nH inductance limit its use as a jumper on power, high-speed, and EMC paths.
Unstable DDR Is Not Always a Chip Problem: How Much Does a 39 Ω Termination Resistor Change the Eye Diagram?
A DDR3 daisy-chain simulation compares address-line A3 with and without a 39 Ω termination resistor, showing how reflections close the eye and why near-end devices can look worse.
Why Moving a Component Only 1 mm from a Press-Fit Connector Still Causes Assembly Interference
Press-fit connector keep-out is a 3D motion envelope, not a pad outline. See why 1 mm spacing can still jam assembly and how to check front, back, side, and tooling.
Is a 0 Ω Resistor Only a Jumper? Six Practical Uses in Hardware Design
A 0 Ω resistor is more than a jumper. Use it for single-point grounds, config options, EMC, crude current sense, SI placeholders, and simple hot-plug current limiting.
PCB Layout Pitfalls: One Small Detail Can Ruin the Board
Common PCB failures come from small layout details: HV/LV partitioning, crystal placement, split crossings, pad exits, via walls, gold-finger openings, and tombstone pads.
Skip One Ground Via and the Board Still Runs. Why Might EMC Still Fail?
A board can boot after a high-speed layer change and still fail EMC. Without a nearby return via, current detours, the loop grows, and radiation and the eye can degrade.
When Space Is Tight, Can a Via Go Directly in the Pad?
A via in an SMT pad can wick solder and unbalance wetting. Via-in-pad is usable only when fill, capping, stencil, inspection, and fabricator capability are confirmed.
Why Does a Pad Tied Straight to a Copper Pour Become More Prone to Poor Soldering?
A pad solidly tied into a large copper pour dumps heat into the plane and is harder to wet. Thermal relief limits that heat path, but the spokes must still carry current.
2-Layer vs 4-Layer FR4 PCB: Cost, Performance, and Design Differences
2 layer vs 4 layer FR4 PCB from the fab floor: layer structure, routing space, signal integrity, cost, and when factories recommend upgrading to 4-layer.
FR4 vs HDI PCB: Structure, Performance, and Cost Differences
FR4 vs HDI PCB from the fab floor: when a drilled FR4 multilayer is enough, when microvias cut layer count, and how density, yield, and sequential lamination set cost.
