A single sharp corner on a copper trace can trap etchant during production. Weeks later, that trapped acid eats through the conductor from the inside out, causing an intermittent field failure that no functional test caught. This is just one of many common PCB problems that slip past inexperienced fabricators. In our builds, we have learned that preventing these defects requires specific validation checks at both the design and manufacturing stages, not just hope. Below, we break down five frequent issues and the exact countermeasures your contract manufacturer should be applying to protect your yield and reputation. Acid Traps: The Silent Etching Threat Acid traps form when etching solution pools in small […]

A missing aperture definition in your PCB Gerber files can halt a production line for days. We have seen entire batches of bare boards scrapped because the solder mask layer did not align with the copper pads, all due to a corrupted vector coordinate in the output zip. These files are not just digital paperwork; they are the direct machine instructions that translate your CAD design into physical hardware. Understanding what these files actually contain prevents expensive re-spins. Below, we break down the formats, generation process, and documentation standards that keep manufacturing running smoothly. What Are PCB Gerber Files Exactly? Originally developed by Gerber Scientific (founded by Joseph Gerber), this format became […]

A fresh batch of industrial controller boards just failed field testing. The root cause? Conformal coating seeped into connector contacts during processing. This scenario repeats constantly in conformal coating exclusion zones management. Many engineers assume full-board coverage equals better protection. Actually, unmasked functional areas create invisible failure points that surface months after shipment. Understanding which components demand strict masking prevents costly rework and warranty claims. Connectors: Top Priority for Conformal Coating Exclusion Zones Connectors sit at the top of the conformal coating exclusion zones list because they depend entirely on metal-to-metal contact. Contact resistance typically measures only tens of milliohms when clean. Coating residue inside pin holes or mating surfaces creates an insulating film […]