EMC Fixes in PCB Layout: Return Paths First Most boards that fail electromagnetic compatibility testing do so for reasons that were present in the layout from the first day, and the fixes are usually cheap if they are applied early and expensive if they are applied after the enclosure has…

Test Coverage: Design for Testability: Test Access and Coverage Rules Design for test is one of the few engineering disciplines that costs nothing to apply and saves a great deal when it is missing. Its whole purpose is to make a fault visible at the stage where it can be…

SMT Component Placement Accuracy and Offset Control Placement accuracy sounds like a single number on a machine datasheet, but in production it is the sum of registration, vision, mechanical wear, and the tolerance built into your land patterns. A head that can place a chip within twenty-five micrometres still produces…

Silver Sintering Die Attach for Power Electronics Boards As silicon carbide and gallium nitride devices push power densities upward, the weakest element in many modules is no longer the semiconductor but the layer that attaches it to the substrate. Solder melts between 180 and 230 degrees, and a joint that…

HALT Testing: HALT and HASS Testing for PCB Assembly Reliability Two acronyms dominate accelerated reliability work on electronics, and they answer different questions. HALT testing asks how much abuse a design can take before it breaks, while HASS testing asks whether a production unit was built correctly. Used together they…

PCB Manufacturing Price: A 2020-2025 Cost Analysis Board pricing moved sharply between 2020 and 2025, and not in one direction. Laminate shortages pushed prices up, capacity expansions pushed them back down, and the mix of technology being bought changed at the same time. This analysis explains what happened to the…

PCB Copper Thickness Measurement Methods and Techniques Copper thickness is one of the few PCB characteristics that directly determines current capacity, impedance, and the fatigue life of a plated barrel, yet it is also one of the easiest to report carelessly. Two labs can measure the same panel and disagree…

Why PCB Design Relies on EM Simulation Before Fabrication A board can be designed, fabricated and assembled by a competent team and still fail its first electromagnetic compatibility test. When that happens, the correction is rarely a single change: it is a redesign of the layer assignment, the return path…

Wave Soldering Thermal Profile and Pot Maintenance Guide Wave soldering still carries through-hole connectors, power terminals, and mixed-technology assemblies that reflow cannot reach, and it does so with a process window far narrower than most engineers assume. The thermal profile decides whether flux activates and whether barrels fill, while the…

TVS Diode Clamping Vs The High Speed Eye Diagram Selection of a transient voltage suppressor often begins and ends with the clamping voltage on the datasheet. A part that clamps lower than its competitor looks like the safer choice for a high speed interface, and it often is not: the…