PCB Statement of Work Environment: A Practical Manufacturing Guide 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…

Four Point Bend Testing for Solder Joint Reliability Four point bend testing loads a populated board so that it curves between two inner supports while being pushed by two outer rollers. The arrangement produces a region of uniform bending moment between the inner supports, which means the joints inside that…

Thermal Profiler Setup: Getting a True Reflow Reading A thermal profiler records the temperature history that a board actually experiences, and the value of that record depends entirely on how the sensors were attached. A reading taken beside a pad instead of on it, or routed so that heat drains…

Pogo Pin Fixtures: Contact Resistance and Maintenance A pogo pin is a spring loaded contact that presses a probe tip against a test point, and a bed of nails fixture holds hundreds of them in a plate that is lowered onto the board. Every measurement the fixture makes passes through…

Laminate Moisture: 4 Checks Before the Press Cycle Laminate moisture is the water that a core or a sheet of prepreg holds inside it, and it has no place in a press cycle. When the stack is heated, that water turns to steam, and the steam has to go somewhere:…

PCB Statement of Work Timing: Design and Assembly Considerations 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 statement of work timing gives you a practical…

Busbar Contact Resistance: 4 Checks for Even Plating Current Current leaves the rectifier through copper busbars, crosses a series of bolted and clamped joints, and enters the tank through the rack hooks. Every one of those interfaces has a resistance, and the sum of them decides how much of the…

Solder Mask Ink Viscosity: 4 Checks Before Screen Printing Ink viscosity is the property that decides how a solder mask behaves as it passes through the screen. Too thick and the ink will not flow into the openings; too thin and it bleeds under the emulsion, closing the fine clearances…

PCB Statement of Work Handover: Key Process and Quality Checks 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…

Poka Yoke in PCB Assembly: 7 Devices That Stop Mistakes A poka yoke is a device or a rule that makes a mistake impossible to commit, or impossible to pass on unnoticed. The term comes from Japanese manufacturing practice, and on a PCB assembly line the idea is simple: rather…