PCB Shipment Inspection to the IPC-A-600 Class 3 Standard A customer who receives bare boards has no way to inspect the inside of a plated hole, and very little way to judge a surface finish beyond its appearance. That is why the acceptance standard has to be agreed before the…

PCB Card Edge Connector Design: What Buyers and Engineers Should Check 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.…

Zero Drift and Weighing Test on a Scale Main Board A scale main board that reads correctly when it leaves the line can drift in the field for reasons that have nothing to do with the conversion chip. A slowly wandering zero or a display that keeps jumping may come…

PCB Backplane Design Rules: Design, Process, and Quality Notes 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 backplane design rules from the perspective of a PCBA factory…

RS485 Testing on a Smart Meter Communication Board A smart meter communication board can power up correctly and still fail in the field, because the behaviour that matters is only visible under repeated traffic. A board may answer the first request after a cold start and then stop, lose an…

PCB Mixed Dielectric Stackup: 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…

PCB Low Loss Laminate Selection: Process Details and Inspection Points 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 low loss laminate selection from the perspective of a…

QFN Assembly and X-ray Inspection on a Charging Module Board A charging module control board combines power management, sampling, communication and protection, and it usually carries both bottom terminated devices and a dense population of small passives. On a QFN assembly the visible fillets on the outer leads prove very…

PCB Inkjet Legend Marking: A Practical Review for Manufacturing Teams 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…

PCB Eye Diagram Measurement: What Matters on the Production Line 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 eye diagram measurement gives you a practical…