Gong, PCB

Understand PCB copper peel strength, calculate N/mm correctly, compare test conditions, and check supplier reports without relying on a universal pass value.

Learn what PCB microsection analysis reveals, how to review measurements and sample identity, and why one good cross-section cannot approve an entire lot.

Understand conductive anodic filament in PCBs, distinguish suspected CAF from other leakage, and check supplier test evidence before approving a build.

Calculate solder mask dam width, compare individual and shared openings, and prepare fine-pitch fabrication checks without relying on a universal minimum.

Understand PCB copper thieving, protect sensitive keepouts and review CAM additions with a practical approval checklist before fabrication.

Specify PCB tooling holes for panel handling and test fixtures, with pin-fit examples, placement checks and a practical fabrication drawing checklist.

Learn when PCB backdrilling helps, how residual stubs differ from drill depth, and what stackup, fabrication files and first-lot checks to agree before ordering.

Follow glass-epoxy PCB laminate manufacture from resin impregnation to copper-clad sheets, with process boundaries, defect checks and lot-release questions.

Understand PCB factory process control with practical control plans, specification versus control limits, a Cp/Cpk example, sampling checks and reaction plans.