Cleanliness Test Selection for PCB Assemblies: 5 Rules Cleanliness is one of the few process outputs that cannot be judged reliably by looking at the board. A residue that is invisible under the microscope can hold enough ionic material to corrode a fine pitch circuit in service. A visible mark,…

Step Stencil Control for Mixed Paste Volumes: 6 Rules A step stencil carries two or more thicknesses in one sheet, so a heavy deposit can be printed on a power pad while a fine pitch area receives a thin one. It removes the compromise that a single thickness forces on…

PCB Breakaway Tab Plan: Laying It Out First 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 breakaway tab plan gives you a practical advantage when…

PCB Impedance Coupon Traceability: Following One Board 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 impedance coupon traceability from the perspective of a PCBA factory floor, covering…

Convection Airflow Balance in the Reflow Oven Convection airflow is the mechanism that carries heat from the heater bank to the board, and its balance across the tunnel decides whether two identical boards processed side by side receive the same thermal profile. An oven can hold its set points perfectly…

PCB Breakaway Tab 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 breakaway tab data from the perspective of a PCBA factory floor,…

PCB Breakaway Tab Limits: Where the Edges Are 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…

Test Point Contamination and Contact Resistance in ICT Test point contamination raises the resistance between the probe and the pad, and the in-circuit tester reads that added resistance as part of the circuit it is measuring. A pad that should show 5 milliohms of contact resistance can show 500 milliohms…

PCB Breakaway Tab Maintenance: Keeping It Working 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 breakaway tab maintenance gives you a practical advantage when you…

Conveyor Finger Maintenance and Board Support in Reflow The conveyor finger is the only contact the board has with the machine, and it defines where the board sits in every zone. A finger that has bent, worn or picked up a crust of flux changes the board position, the heat…