Plating Bath Specific Gravity: 4 Limits of the Hydrometer Plating bath specific gravity is the density of the working solution compared with the density of water, and it is the fastest chemical check available on the line. A sample is drawn, a hydrometer floats in it, and the reading tells…

PCB Quality Agreement Maintenance: 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 explains…

PCB Quality Agreement Setup: Getting Ready for Production A quality agreement is a working document, not a formality. It records what the factory will control, how each check is measured, and who signs when something drifts. Buyers who treat PCB quality agreement setup as paperwork often discover the gap only…

Immersion Gold Bath: 4 Checks for a Reliable ENIG Finish The immersion gold bath is the last wet stage of an ENIG finish, and it works by displacement rather than by reduction. Gold ions in solution take electrons from the nickel beneath them, so the gold deposits as the nickel…

PCB Quality Agreement Defects: What Goes Wrong A quality agreement is meant to remove doubt from a PCB order. It states who checks what, which records are kept, and how a dispute gets settled. In practice, many agreements fail not because the parties are careless, but because the wording never…

Plating Current Density: 4 Checks for Even Copper Plating current density is the current divided by the area being plated, and it is the single number that decides how fast copper builds on the panel. Too little and the deposit is thin and dull; too much and the copper burns…

Drill Wander Control in Deep PCB Holes Drill wander is the lateral deflection of a drilled hole from the position and axis the program intended. On a 0.3 mm hole drilled through a 2.4 mm panel, a wander of 60 um at the exit is common unless the process is…

PCB Quality Agreement Standards: Agreeing the Rules 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 quality agreement standards from the perspective of a PCBA factory floor, covering…

Blowhole Defects in Wave Soldering: Causes and Cures A blowhole is a void that has pushed a bubble of gas up through the solder fillet and left an opening at the surface of the joint. It is not the same defect as a pin hole caused by shrinkage, and it…

PCB Quality Agreement Training: From Prototype to Volume Production 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…