Edge Clearance: Preparation, Placement and Process Control Every surface mount line has a set of dimensional limits that are not written on the board drawing but are enforced every time the panel enters a machine. Understanding those limits explains why a design that is electrically perfect can still be difficult…

Differential Pair Matching And Phase Tuning A differential pair carries information in the difference between two conductors, and the receiver recovers it by comparing them. Anything that delays one member of the pair relative to the other reduces that difference before the comparison is made, and the loss is not…

Adhesive Application Control on the SMT Line Adhesive application looks like the simplest operation on an SMT line: a dispensing head moves across the board and leaves a row of dots. In practice it is one of the most sensitive steps in the process, because the result, a dot a…

Drill Wear: PCB Drilling and Hole Quality: What Controls the Result The quality of a drilled hole determines the quality of everything that happens inside it, and the factors that control it are divided between the designer, who sets the geometry, and the shop, which sets the process. Understanding where…

How a PCB Unit Price Is Calculated: The Real Breakdown A unit price is an average, and averages hide their inputs. The number a buyer receives contains material, process time, yield, tooling amortisation and test, and each of those responds differently to volume and to design change. This guide explains…

Solder Paste Printing Parameters and Squeegee Control Solder paste printing is the step that decides how much alloy each pad receives, and almost every assembly defect can be traced back to it. Deposit volume, shape, and position all come from the interaction between a stencil, a squeegee, a paste, and…

PCB Coating Repair: Fixing a Broken Conformal Coat A conformal coat protects a finished board from moisture, dust and chemical attack. When that film cracks, lifts or gets scratched during handling, the exposed copper and solder joints lose their barrier. Repair is possible, but the result depends on surface preparation…

PCB Void Rate Measurement: What Buyers and Engineers Should Check 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 void rate measurement gives you a practical…

PCB Squeegee Pressure Setting: Design, Process, and Quality Notes 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 squeegee pressure setting gives you a practical advantage…

PCB Coating for Harsh Environment: Design, Process, and Quality Notes 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…