PCB Base Material Selection: Design and Assembly Considerations 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…

8-Layer PCB Price Guide: Prototype and Volume Costs Eight layers is the point where a board stops being a wiring platform and becomes a transmission structure. Two inner layers usually become solid references, the routing is split by function, and the stackup itself starts to set the electrical performance. That…

PCB Prepreg and Core Choice: A Practical Manufacturing Guide 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 prepreg and core choice gives you a practical…

FR-2 PCB: Where Phenolic Laminate Still Makes Sense Most discussions of laminate assume a glass fibre substrate, and for good reason: it covers the overwhelming majority of boards built today. There is still a large category of products, though, where a paper-based phenolic material is the right answer and a…

PCB Tg and Td Meaning: Two Numbers on a Data Sheet Two numbers on a laminate data sheet decide how a board behaves in the reflow oven and in the field. Tg marks the glass transition temperature, where the resin softens and expands faster. Td marks the decomposition temperature, where…

Design Review: Checks Before a PCB Layout Is Released The last stage before a layout is released is a design review that compares the board against the documents it was built from. It is the cheapest point at which an error can be found, and the checks are the same…

Stencil Manufacturing Methods Compared: Laser, Etching and Electroforming The stencil is the one tool in the SMT process that directly sets the volume of solder paste on every pad. Three methods dominate its manufacture, and they differ in how the aperture walls are formed, which is what ultimately decides how…

Component Placement: The Decisions That Matter Most Placement is the most leveraged decision in a layout. Once the large parts and the connectors are fixed, the routing options are largely determined: the length of the critical nets, the size of the loops, the thermal path from the power stage and…

SMT Prototype Quality Control: Process Checks That Prevent Defects Small batch SMT is judged by a different standard than volume production. There is no long run over which variation averages out, so a single setup error becomes a defect rate that looks alarming on a small sample. The countermeasure is…

Automotive Sensor PCB: Materials, EMC and Reliability A sensor board inside a vehicle is a small circuit in a hostile place. It sits on the engine, in the wheel arch, behind a bumper or inside a seat, and it has to produce the same reading after fifteen years and two…