PCB Storage and Shelf Life Before Assembly A finished board that sits in a warehouse does not stay the same. The surface finish oxidises, the laminate absorbs moisture from the air, and the mask continues to cure slowly, and all three change how the board behaves when it reaches the…

PCB Board Storage Cost: What It Adds Up To 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 board storage cost from the perspective of a PCBA factory…

PCB Board Storage Problems: When It Goes Wrong 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 board storage problems gives you a practical advantage when…

PCB Cleanroom Handover: Passing It On 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 cleanroom handover from the perspective of a PCBA factory floor, covering handing over…

PCB Cleanroom Specification: Writing It Down Precisely 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 cleanroom specification from the perspective of a PCBA factory floor, covering specifying…

Work Instruction Content for PCB Assembly A work instruction is the document that tells a qualified operator how to perform one operation and how to know that it has been performed correctly. It is written for the person at the machine, not for the customer or the auditor, and it…

Solderable Finish Shelf Life and Storage A solderable finish is a thin layer of metal that has to remain wettable until the moment it is soldered. It oxidises, it corrodes, it diffuses into the layers beneath it, and it picks up contamination from the environment. Shelf life is the period…

PCB Cleanroom Sample: Checking a Small Piece 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 cleanroom sample gives you a practical advantage when you choose…

Component Orientation and Polarity Verification An orientation error is a defect that passes almost every test. A diode placed the wrong way round conducts in the reverse direction and may still pass a functional test that only checks for presence; an electrolytic capacitor reversed may work briefly and fail later;…

Solder Joint Cooling Rate and Grain Structure A solder joint is not a homogeneous piece of metal. It is a composite of tin-rich grains, particles of intermetallic compound and the layers that form where the alloy meets the copper or the component finish. The size and distribution of those features…