High Frequency PCB Laminate: Dk, Df and How to Choose Once a serial link runs above a few gigabits per second, the laminate stops being an inert substrate and starts being part of the channel. Two boards with identical routing and identical drivers can deliver different eye heights purely because…

PCB Slot Antenna Avoidance: When a Gap Starts to Radiate 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 slot antenna avoidance from the perspective of a PCBA…

PCB Crosstalk Between Adjacent Traces: Signals That Talk to Each Other 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.…

PCB Guard Trace on A Sensitive Node: A Fence Around a Weak Signal 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…

Insulated Metal Substrate PCB: Structure and Applications Heat is what limits a power electronic design, and the insulated metal substrate PCB is one of the most direct answers to it. Instead of relying on copper area and airflow to move heat away from a component, an IMS board carries that…

PCB Ground Strap in An Enclosure: Tying the Two Returns Together 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 ground strap in an enclosure gives…

Stepped Rigid-Flex Board: Design Guide for Cavity and Step Structures A stepped rigid-flex board changes thickness across the same outline. A rigid section may be four layers thick, the flex section two, and the components may sit in a cavity milled into the structure so that total height stays within…

PCB Silkscreen: Process, Materials and Design Rules The PCB silkscreen is the printed layer that carries reference designators, polarity marks, connector pin numbering and the board revision. It is the least electrically significant layer on the board and the one most often read by the people who assemble, test and…

Medical FR4 PCB: Requirements, Documentation and Cost Drivers A medical FR4 PCB is usually the same laminate as any other FR4 board. What changes is the documentation, the inspection and the cleanliness requirements applied to it, and those changes are what move the price. Understanding where the cost sits lets…

Wire-Bondable Soft Gold PCB: Surface Finish for Bond Reliability Wire bonding joins a bare die to a board with fine metal wire, usually gold or aluminium. The joint is formed by heat, pressure and ultrasonic energy rather than by solder, and the reliability of that joint depends almost entirely on…