Nitrogen Blanket on a Wave Solder Machine: Setup and Limits A nitrogen blanket is an inert atmosphere maintained over the solder pot and along the tunnel of a wave solder machine. Its purpose is to displace oxygen, which otherwise reacts with the molten solder to form oxide and with the…

CAF Resistance Testing: Test Method and Failure Criteria CAF, or conductive anodic filament, is a failure mechanism in which a copper salt filament grows along the resin and glass interface between two conductors under the combined influence of moisture, bias voltage and time. The filament does not form inside a…

PCB Solder Bath Environment: Where It Happens 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…

PCB Solder Bath Timing: How Long It Takes 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 solder bath timing gives you a practical advantage when…

DI Resin Regeneration: Conductivity and Rinse Quality Resin regeneration is the service step that restores a deionising cylinder to full capacity after it has taken up ions from the process water. Without it the water quality falls away quietly, the rinse tanks lose their margin, and plating faults appear days…

PCB Solder Bath Handover: Passing It On 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 solder bath handover gives you a practical advantage when you…

Plating Tank Cleaning: Sludge, Passivation and Refill Tank cleaning is the shutdown work that removes the sludge, the nodules and the chemical film that build up on the walls of a plating tank. It is done between campaigns, when the bath is drained, and it decides whether the next bath…

Lamination Vacuum Pump Care: Oil, Vanes and Filters Vacuum pump care is the routine that keeps a press able to pull the air out of a book of prepreg before the resin gels. It sounds like maintenance housekeeping, but the pump is the only thing standing between a sound laminate…

Route Tab Stress: Cuts, Tabs and Edge Quality Tab stress is the damage left in a panel when the tabs holding a board are cut or broken, and it appears as lifted copper, a cracked laminate or a hairline crack that only shows itself after thermal cycling. The cut itself…

Liquid Photoimageable Resist: Coating and Imaging Control Liquid photoimageable resist is the light sensitive coating that turns artwork into a copper pattern on an inner layer or a plated pattern on an outer layer. It goes on as a liquid, is dried, is exposed through the artwork and is then…