PCB Shop Humidity Data: What the Numbers Say 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 shop humidity data from the perspective of a PCBA factory floor,…

Nano Coating: Design Rules and Process Limits A nano coating is a thin chemical film applied to the walls of a stencil to change how paste behaves at the aperture. The claim is simple: less paste sticks to the wall, so the deposit is more complete and the underside of…

Stencil Foil Tension: Frame Care and Paste Release A stainless stencil is a spring, and like any spring it only behaves predictably while it is stretched. Stencil foil tension, the force that keeps the mesh and the foil flat between the frame members, decides how the foil behaves when the…

Thermal Pad Voiding Control A thermal pad is a large area of paste that has to reflow into a thin, continuous layer between a component and the board. Because the area is large and the gap is small, the volatiles from the flux have very little room to escape, and…

Line Balance and Buffer Size on an SMT Line Line balance is the gap between the rate a line can produce and the rate it actually produces once the stations have to wait for one another. On an SMT line the constraints are rarely the placement machines, which run at…

Fabrication Audit Checklist and Records An audit is a walk through a shop comparing what is written with what is done, and the records are what make the comparison possible. A shop that runs a good process and keeps poor records fails an audit, and a shop that keeps good…

Shear and Pull Testing of Solder Joints A solder joint can be pulled, sheared or bent, and each test measures a different property. The result is a number that describes the joint and the process that made it, and it is only comparable with another number taken the same way.…

PCB Shop Humidity Limits: Where the Edges Are 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 shop humidity limits gives you a practical advantage when…

PCB Shop Humidity Setup: Getting Ready 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 shop…

AOI Programming: Design Rules and Process Limits Automated optical inspection only earns its place if it finds the defects that matter without flooding the line with calls that are not defects. The difference between a useful program and an expensive one is almost entirely in the programming, and the work…