PCB Schematic vs PCB Design File: What Each Stage Defines New engineers often use the terms interchangeably, and the confusion causes real mistakes: a review that treats a schematic as if it were a layout, or a change made in the layout that never finds its way back into the…

Motion Control PCB Design: Current, Grounding and Interfaces Motion control hardware sits between two worlds. On one side there is a power stage switching tens of amps into a motor; on the other there is a feedback chain measuring microvolt-level signals from a current shunt and counting pulses from an…

PCB Prototype Inspection and Safe Board Testing A bare board can be perfect in the fabrication report and still fail in the lab because of how it was handled. Equally, a board with a genuine defect can pass unnoticed because the inspection was limited to a quick visual glance. Incoming…

Flexible PCB Materials: Polyimide, PET and LCP Compared A flexible circuit is only as good as the film it is built on, and the choice of that film sets the temperature limit, the bend life, the electrical loss and the cost of the finished part. The materials used in flexible…

Copper Foil Peeling in PCB Fabrication: Causes and Fixes When copper separates from the laminate it usually does so in a way that looks like a design error and is actually a process one. A trace that lifts during assembly, a pad that peels when a component is reworked, a…

Rigid-Flex Manufacturing Process: Steps and Tolerances A rigid-flex board is not a rigid board with a flexible tail glued on. It is a single construction in which rigid and flexible sections are laminated together and permanently interconnected, which means the process has to satisfy the requirements of both. That combination…

IoT PCB Design: Standards, Low Power and RF Integration An IoT product combines four things that are individually difficult and together are unforgiving: a radio, a battery, sensors with small analogue signals, and a fast digital core, all inside a package the size of a coin. An IoT PCB design…

PCBA Design Mistakes That Raise Assembly Cost Most of the cost of a PCB assembly is fixed by decisions taken during layout, long before a purchase order is raised. Panel geometry, component choice, the number of part types and the surface finish all determine how difficult the build is, and…

Micro Hole Machining Methods in PCB Production Hole sizes on printed circuit boards have fallen steadily as boards moved from single-sided to multilayer construction and as density increased. The definitions used in production are simple: a diameter below 0.6 mm is a small hole, and one below 0.3 mm is…

PCB Layout Checklist: Placement, Routing and Rule Checks A PCB layout checklist is useful for the same reason it is useful in an aircraft cockpit: it protects against the failure mode of a competent person concentrating on one thing and forgetting another. Layout work invites exactly that failure, because the…